commit 8bcc8ca34ff0dff5e1d1c1b0382fe57974890e50
author Carl Brando <carllb52@gmail.com> Tue Mar 15 08:27:35 2022 -0400
committer Carl Brando <carllb52@gmail.com> Tue Mar 15 08:27:35 2022 -0400
tree 4f920e0d03449f2bad4af1b89bca246ea66ce0b6
parent 2fe26972d8e00076be59e0e87cf119f5151236ac
parent 07c61dd8f846c1e277f92c155839bd85840b1230

Merge branch 'main' of gitlab.com:sshah389/mixed-signal_reram-mpw-5 into main

mag/sky130_sc_ams__comparator_1.mag

diff --git a/mag/sky130_sc_ams__comparator_1.mag b/mag/sky130_sc_ams__comparator_1.mag
new file mode 100644
index 0000000..2ecfe80
--- /dev/null
+++ b/mag/sky130_sc_ams__comparator_1.mag
@@ -0,0 +1,1499 @@
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+<< labels >>
+flabel metal1 29 527 63 561 0 FreeSans 192 0 0 0 VPWR
+port 7 nsew
+flabel nwell 87 527 121 561 0 FreeSans 192 0 0 0 VPB
+port 6 nsew
+flabel metal1 29 -17 63 17 0 FreeSans 192 0 0 0 VGND
+port 4 nsew
+flabel pwell 100 -17 134 17 0 FreeSans 192 0 0 0 VNB
+port 5 nsew
+flabel locali 652 161 686 195 0 FreeSans 192 0 0 0 VIN2
+port 3 nsew
+flabel locali 652 297 686 331 0 FreeSans 192 0 0 0 VIN1
+port 2 nsew
+flabel locali 128 358 162 392 0 FreeSans 192 0 0 0 CLK
+port 1 nsew
+flabel locali 4798 323 4832 357 0 FreeSans 192 0 0 0 X
+port 8 nsew
+flabel locali 4798 255 4832 289 0 FreeSans 192 0 0 0 X
+port 8 nsew
+flabel locali 4798 187 4832 221 0 FreeSans 192 0 0 0 X
+port 8 nsew
+flabel locali 4798 391 4832 425 0 FreeSans 192 0 0 0 X
+port 8 nsew
+flabel locali 4798 119 4832 153 0 FreeSans 192 0 0 0 X
+port 8 nsew
+<< end >>

mag/sky130_sc_ams__ota_1.mag

diff --git a/mag/sky130_sc_ams__ota_1.mag b/mag/sky130_sc_ams__ota_1.mag
new file mode 100644
index 0000000..0b45396
--- /dev/null
+++ b/mag/sky130_sc_ams__ota_1.mag
@@ -0,0 +1,2435 @@
+magic
+tech sky130B
+magscale 1 2
+timestamp 1647118226
+<< nwell >>
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+<< pmos >>
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+<< ndiff >>
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+<< metal1 >>
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+rect 0 527 29 561
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+rect 339 527 397 561
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+rect 6411 -17 6469 17
+rect 6503 -17 6561 17
+rect 6595 -17 6653 17
+rect 6687 -17 6716 17
+rect 0 -48 6716 -17
+<< labels >>
+flabel metal1 29 527 63 561 0 FreeSans 192 0 0 0 VPWR
+port 8 nsew
+flabel nwell 87 527 121 561 0 FreeSans 192 0 0 0 VPB
+port 7 nsew
+flabel metal1 29 -17 63 17 0 FreeSans 192 0 0 0 VGND
+port 5 nsew
+flabel pwell 100 -17 134 17 0 FreeSans 192 0 0 0 VNB
+port 6 nsew
+flabel locali 6657 366 6691 400 0 FreeSans 192 0 0 0 Iout
+port 4 nsew
+flabel locali 6657 298 6691 332 0 FreeSans 192 0 0 0 Iout
+port 4 nsew
+flabel locali 6657 230 6691 264 0 FreeSans 192 0 0 0 Iout
+port 4 nsew
+flabel locali 6657 162 6691 196 0 FreeSans 192 0 0 0 Iout
+port 4 nsew
+flabel locali 4815 55 4849 89 0 FreeSans 192 0 0 0 Vin2
+port 2 nsew
+flabel locali 4815 437 4849 471 0 FreeSans 192 0 0 0 Vin1
+port 1 nsew
+<< end >>

mag/user_analog_project_wrapper.mag

diff --git a/mag/user_analog_project_wrapper.mag b/mag/user_analog_project_wrapper.mag
index 96f8caa..bcd04e5 100644
--- a/mag/user_analog_project_wrapper.mag
+++ b/mag/user_analog_project_wrapper.mag
@@ -1,11 +1,15 @@
 magic
 tech sky130B
 magscale 1 2
-timestamp 1646596575
+timestamp 1647124351
 << dnwell >>
 rect 561940 685328 563006 686342
 << pwell >>
 rect 562058 685450 562858 686250
+<< locali >>
+rect 548026 677495 548438 677529
+rect 543778 677268 543874 677316
+rect 548026 676951 548440 676985
 << metal1 >>
 rect 561180 686400 561428 686442
 rect 561180 686254 561216 686400
@@ -36,18 +40,36 @@
 rect 225178 683618 560962 683790
 rect 224866 683613 560962 683618
 rect 224866 683612 226828 683613
+rect 548032 677464 548438 677560
+rect 543766 677426 543886 677436
+rect 543766 677372 543776 677426
+rect 543876 677372 543886 677426
+rect 543766 677262 543886 677372
+rect 543162 677002 543810 677016
+rect 543162 676932 543168 677002
+rect 543794 676932 543810 677002
+rect 543162 676920 543810 676932
+rect 548029 676920 548440 677016
 << via1 >>
 rect 561216 686254 561378 686400
 rect 561216 685764 561378 685910
 rect 326572 684652 326878 684824
 rect 224872 683618 225178 683790
+rect 554512 677472 555148 677550
+rect 543776 677372 543876 677426
+rect 543168 676932 543794 677002
 << metal2 >>
+rect 512622 703358 513362 703376
 rect 415430 703206 416162 703216
 rect 415430 702616 415440 703206
 rect 416152 702616 416162 703206
 rect 415430 702606 416162 702616
 rect 467610 703066 468342 703076
 rect -193 -193 193 700125
+rect 172840 699800 173580 699824
+rect 172840 699100 172858 699800
+rect 173558 699100 173580 699800
+rect 172840 699084 173580 699100
 rect 224634 698474 225366 698484
 rect 224634 697884 224644 698474
 rect 225356 697884 225366 698474
@@ -66,11 +88,14 @@
 rect 467610 702476 467620 703066
 rect 468332 702476 468342 703066
 rect 467610 702466 468342 702476
+rect 512622 702658 512642 703358
+rect 513342 702658 513362 703358
+rect 467832 686486 468157 702466
+rect 512622 687290 513362 702658
 rect 522684 702928 523010 702938
 rect 522684 702578 522694 702928
 rect 523000 702578 523010 702928
 rect 568938 702909 569264 702910
-rect 467832 686486 468157 702466
 rect 522684 702447 523010 702578
 rect 568933 702900 569264 702909
 rect 568933 702550 568942 702900
@@ -79,9 +104,16 @@
 rect 568933 700536 569264 702550
 rect 522681 700196 562334 700528
 rect 564007 700208 569264 700536
+rect 512622 687282 513364 687290
+rect 512622 686566 512642 687282
+rect 513342 686566 513364 687282
 rect 562009 686923 562327 700196
 rect 564010 687532 564332 700208
 rect 568933 700207 569264 700208
+rect 512622 686565 512766 686566
+rect 513264 686565 513364 686566
+rect 512622 686558 513364 686565
+rect 512624 686550 513364 686558
 rect 467832 686484 560486 686486
 rect 467832 686400 561462 686484
 rect 467832 686254 561216 686400
@@ -116,6 +148,35 @@
 rect 583036 681176 583046 681526
 rect 562127 681170 583046 681176
 rect 582202 681166 583046 681170
+rect 543766 677426 543886 677696
+rect 555482 677560 559312 677618
+rect 554504 677550 559312 677560
+rect 554504 677472 554512 677550
+rect 555148 677472 559312 677550
+rect 554504 677464 559312 677472
+rect 543766 677372 543776 677426
+rect 543876 677372 543886 677426
+rect 543766 677364 543886 677372
+rect 555482 677362 559312 677464
+rect 512642 677336 542642 677338
+rect 512624 677308 542642 677336
+rect 512624 676608 512642 677308
+rect 513342 677140 542642 677308
+rect 513342 677016 542784 677140
+rect 513342 677002 543810 677016
+rect 513342 676932 543168 677002
+rect 543794 676932 543810 677002
+rect 513342 676920 543810 676932
+rect 513342 676796 542784 676920
+rect 513342 676608 542642 676796
+rect 512624 676598 542642 676608
+rect 512624 676582 513360 676598
+rect 558568 642500 559308 677362
+rect 558568 642478 583348 642500
+rect 558568 641778 582624 642478
+rect 583324 641778 583348 642478
+rect 558568 641760 583348 641778
+rect 558568 641758 559308 641760
 rect 524 -800 636 480
 rect 1706 -800 1818 480
 rect 2888 -800 3000 480
@@ -612,13 +673,21 @@
 rect 583250 -800 583362 480
 << via2 >>
 rect 415440 702616 416152 703206
+rect 172858 699100 173558 699800
 rect 224644 697884 225356 698474
 rect 326344 697884 327056 698474
 rect 467620 702476 468332 703066
+rect 512642 702658 513342 703358
 rect 522694 702578 523000 702928
 rect 568942 702550 569254 702900
+rect 512642 686566 513342 687282
+rect 512766 686565 513264 686566
 rect 582730 681176 583036 681526
+rect 512642 676608 513342 677308
+rect 582624 641778 583324 642478
 << metal3 >>
+rect 165596 704800 170590 704804
+rect 175896 704800 180890 704804
 rect 16194 702300 21194 704800
 rect 68194 702300 73194 704800
 rect 120194 702300 125194 704800
@@ -642,7 +711,10 @@
 rect 465394 702476 467620 703066
 rect 468332 702476 470394 703066
 rect 465394 702300 470394 702476
-rect 510594 702340 515394 704800
+rect 510594 703358 515394 704800
+rect 510594 702658 512642 703358
+rect 513342 702658 515394 703358
+rect 510594 702340 515394 702658
 rect 520594 702928 525394 704800
 rect 520594 702578 522694 702928
 rect 523000 702578 525394 702928
@@ -651,9 +723,16 @@
 rect 566594 702550 568942 702900
 rect 569254 702550 571594 702900
 rect 566594 702300 571594 702550
+rect 165596 701002 170590 702300
+rect 175896 701002 180890 702300
+rect 165556 699800 180890 701002
+rect 165556 699100 172858 699800
+rect 173558 699100 180890 699800
+rect 165556 698298 180890 699100
 rect 217296 699170 222286 702300
 rect 227598 699170 232588 702300
 rect 217296 698474 232588 699170
+rect 165556 698198 180868 698298
 rect 217296 697884 224644 698474
 rect 225356 697884 232588 698474
 rect 217296 697340 232588 697884
@@ -663,13 +742,28 @@
 rect 318994 697884 326344 698474
 rect 327056 697884 334288 698474
 rect 318994 697340 334288 697884
+rect 512612 687282 513364 687312
+rect 512612 686566 512642 687282
+rect 513342 686566 513364 687282
+rect 512612 686565 512766 686566
+rect 513264 686565 513364 686566
+rect 512612 686542 513364 686565
 rect -800 680242 1700 685242
+rect 512622 677308 513362 686542
 rect 582300 681526 584802 682984
 rect 582300 681176 582730 681526
 rect 583036 681176 584802 681526
 rect 582300 677984 584802 681176
+rect 512622 676758 512642 677308
+rect 512624 676608 512642 676758
+rect 513342 676758 513362 677308
+rect 513342 676608 513360 676758
+rect 512624 676582 513360 676608
 rect -800 643842 1660 648642
-rect 582340 639784 584800 644584
+rect 582340 642478 584800 644584
+rect 582340 641778 582624 642478
+rect 583324 641778 584800 642478
+rect 582340 639784 584800 641778
 rect -800 633842 1660 638642
 rect 582340 629784 584800 634584
 rect 583520 589472 584800 589584
@@ -857,6 +951,14 @@
 timestamp 1645671873
 transform 1 0 562058 0 1 685450
 box 0 0 864 800
+use sky130_sc_ams__comparator_1  sky130_sc_ams__comparator_1_0
+timestamp 1647118226
+transform 1 0 543156 0 1 676968
+box -38 -48 4914 592
+use sky130_sc_ams__ota_1  sky130_sc_ams__ota_1_0
+timestamp 1647118226
+transform 1 0 548438 0 1 676968
+box -38 -48 6754 592
 << labels >>
 flabel metal3 s 583520 269230 584800 269342 0 FreeSans 1120 0 0 0 gpio_analog[0]
 port 0 nsew signal bidirectional
@@ -2008,8 +2110,6 @@
 port 561 nsew signal bidirectional
 flabel metal3 s 520594 702340 525394 704800 0 FreeSans 1920 180 0 0 vssa1
 port 562 nsew signal bidirectional
-flabel metal3 s 510594 702340 515394 704800 0 FreeSans 1920 180 0 0 vssa1
-port 563 nsew signal bidirectional
 flabel metal3 s 582340 146830 584800 151630 0 FreeSans 1120 0 0 0 vssa1
 port 564 nsew signal bidirectional
 flabel metal3 s 582340 136830 584800 141630 0 FreeSans 1120 0 0 0 vssa1
@@ -2238,6 +2338,8 @@
 port 676 nsew signal input
 flabel metal2 s 6434 -800 6546 480 0 FreeSans 1120 90 0 0 wbs_we_i
 port 677 nsew signal input
+flabel metal3 s 510594 702340 515394 704800 0 FreeSans 1920 180 0 0 vssa1
+port 563 nsew signal bidirectional
 << properties >>
 string FIXED_BBOX 0 0 584000 704000
 << end >>

xschem/sky130_sc_ams__comparator_1.sch

diff --git a/xschem/sky130_sc_ams__comparator_1.sch b/xschem/sky130_sc_ams__comparator_1.sch
new file mode 100644
index 0000000..8f65613
--- /dev/null
+++ b/xschem/sky130_sc_ams__comparator_1.sch
@@ -0,0 +1,442 @@
+v {xschem version=2.9.9 file_version=1.2 }
+G {}
+K {}
+V {}
+S {}
+E {}
+N 0 170 0 230 { lab=#net1}
+N -110 170 110 170 { lab=#net1}
+N 110 30 110 110 { lab=#net2}
+N -110 30 -110 110 { lab=#net3}
+N -420 -230 420 -230 { lab=VPWR}
+N -110 -170 -110 -30 { lab=#net4}
+N 110 -170 110 -30 { lab=#net5}
+N -420 -170 -420 80 { lab=#net3}
+N -420 80 -110 80 { lab=#net3}
+N 420 -170 420 80 { lab=#net2}
+N 110 80 420 80 { lab=#net2}
+N -290 -170 -290 -140 { lab=#net4}
+N -290 -140 -110 -140 { lab=#net4}
+N 290 -170 290 -140 { lab=#net5}
+N 110 -140 290 -140 { lab=#net5}
+N -330 -200 -330 -140 { lab=CLK}
+N -460 -140 -330 -140 { lab=CLK}
+N -460 -200 -460 -140 { lab=CLK}
+N 330 -200 330 -140 { lab=CLK}
+N 330 -140 460 -140 { lab=CLK}
+N 460 -200 460 -140 { lab=CLK}
+N -70 -200 70 -140 { lab=#net5}
+N 70 -140 110 -140 { lab=#net5}
+N -70 0 70 -60 { lab=#net5}
+N 70 -60 110 -60 { lab=#net5}
+N -70 -60 70 0 { lab=#net4}
+N -110 -60 -70 -60 { lab=#net4}
+N -70 -140 70 -200 { lab=#net4}
+N -110 -140 -70 -140 { lab=#net4}
+N 620 130 620 170 { lab=#net6}
+N 620 -170 620 -130 { lab=#net7}
+N 580 -200 580 -100 { lab=#net5}
+N 580 100 580 200 { lab=#net4}
+N 110 -120 580 -120 { lab=#net5}
+N -110 -80 500 -80 { lab=#net4}
+N 500 -80 500 140 { lab=#net4}
+N 500 140 580 140 { lab=#net4}
+N 620 -150 760 -150 { lab=#net7}
+N 760 -150 760 -100 { lab=#net7}
+N 760 -100 800 -100 { lab=#net7}
+N 620 150 1120 150 { lab=#net6}
+N 1120 -100 1120 150 { lab=#net6}
+N 1080 -100 1120 -100 { lab=#net6}
+N 840 -200 840 -130 { lab=X}
+N 1040 -200 1040 -130 { lab=#net8}
+N 880 -230 1000 -180 { lab=#net8}
+N 1000 -180 1040 -180 { lab=#net8}
+N 880 -180 1000 -230 { lab=X}
+N 840 -180 880 -180 { lab=X}
+N 840 -260 1040 -260 { lab=VPWR}
+N -420 120 -420 200 { lab=VGND}
+N -420 200 -360 200 { lab=VGND}
+N -360 120 -360 200 { lab=VGND}
+N 360 120 360 200 { lab=VGND}
+N 360 200 420 200 { lab=VGND}
+N 420 120 420 200 { lab=VGND}
+N -320 -100 -320 -20 { lab=VGND}
+N -320 -20 -260 -20 { lab=VGND}
+N -260 -100 -260 -20 { lab=VGND}
+N 260 -100 260 -20 { lab=VGND}
+N 260 -20 320 -20 { lab=VGND}
+N 320 -100 320 -20 { lab=VGND}
+C {devices/ipin.sym} 0 -450 0 0 {name=p4 lab=CLK}
+C {devices/ipin.sym} -150 140 0 0 {name=p1 lab=VIN1}
+C {devices/ipin.sym} 150 140 0 1 {name=p3 lab=VIN2}
+C {devices/ipin.sym} 0 -420 0 0 {name=p5 lab=VGND}
+C {devices/ipin.sym} 0 -390 0 0 {name=p6 lab=VNB}
+C {devices/ipin.sym} 0 -360 0 0 {name=p7 lab=VPB}
+C {devices/ipin.sym} 0 -330 0 0 {name=p8 lab=VPWR}
+C {devices/opin.sym} 840 -150 0 1 {name=p2 lab=X}
+C {sky130_fd_pr/nfet_01v8.sym} -20 260 0 0 {name=M1
+L=0.15
+W=1.49
+nf=1 
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} -440 -200 0 0 {name=M2
+L=0.15
+W=0.45
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} 0 -450 0 1 {name=l1 sig_type=std_logic lab=CLK}
+C {devices/lab_pin.sym} 0 -420 0 1 {name=l2 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} 0 -390 0 1 {name=l3 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 0 -360 0 1 {name=l4 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 0 -330 0 1 {name=l5 sig_type=std_logic lab=VPWR}
+C {devices/lab_pin.sym} -40 260 0 0 {name=l6 sig_type=std_logic lab=CLK}
+C {devices/lab_pin.sym} 0 290 1 1 {name=l7 sig_type=std_logic lab=VGND}
+C {sky130_fd_pr/nfet_01v8.sym} -130 140 0 0 {name=M3
+L=0.15
+W=1
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} 130 140 0 1 {name=M4
+L=0.15
+W=1
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} 90 0 0 0 {name=M5
+L=0.15
+W=0.7
+nf=1 
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -90 0 0 1 {name=M6
+L=0.15
+W=0.7
+nf=1 
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} -310 -200 0 0 {name=M7
+L=0.15
+W=0.45
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} -90 -200 0 1 {name=M8
+L=0.15
+W=0.63
+nf=1
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} 90 -200 0 0 {name=M9
+L=0.15
+W=0.63
+nf=1
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} 310 -200 0 1 {name=M10
+L=0.15
+W=0.45
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} 440 -200 0 1 {name=M11
+L=0.15
+W=0.45
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} 0 -230 3 1 {name=l8 sig_type=std_logic lab=VPWR}
+C {devices/lab_pin.sym} 460 -200 0 1 {name=l9 sig_type=std_logic lab=CLK}
+C {devices/lab_pin.sym} -460 -200 0 0 {name=l10 sig_type=std_logic lab=CLK}
+C {devices/lab_pin.sym} -420 -200 0 1 {name=l11 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} -290 -200 0 1 {name=l12 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 110 -200 0 1 {name=l13 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} -110 -200 0 0 {name=l14 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 290 -200 0 0 {name=l15 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 420 -200 0 0 {name=l16 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 110 0 0 1 {name=l17 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -110 140 0 1 {name=l18 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 0 260 0 1 {name=l19 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -110 0 0 0 {name=l20 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 110 140 0 0 {name=l21 sig_type=std_logic lab=VNB}
+C {sky130_fd_pr/nfet_01v8.sym} 600 -100 0 0 {name=M12
+L=0.15
+W=0.65
+nf=1 
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} 600 -200 0 0 {name=M13
+L=0.15
+W=1
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} 600 200 0 0 {name=M14
+L=0.15
+W=0.65
+nf=1 
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} 600 100 0 0 {name=M15
+L=0.15
+W=1
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} 820 -100 0 0 {name=M16
+L=0.15
+W=0.645
+nf=1 
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} 1060 -100 0 1 {name=M17
+L=0.15
+W=0.645
+nf=1 
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} 620 230 1 1 {name=l22 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} 620 -70 1 1 {name=l23 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} 840 -70 1 1 {name=l24 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} 1040 -70 1 1 {name=l25 sig_type=std_logic lab=VGND}
+C {sky130_fd_pr/pfet_01v8.sym} 860 -230 0 1 {name=M18
+L=0.15
+W=0.7
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} 1020 -230 0 0 {name=M19
+L=0.15
+W=0.7
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} 940 -260 3 1 {name=l26 sig_type=std_logic lab=VPWR}
+C {devices/lab_pin.sym} 620 -230 3 1 {name=l27 sig_type=std_logic lab=VPWR}
+C {devices/lab_pin.sym} 620 70 3 1 {name=l28 sig_type=std_logic lab=VPWR}
+C {devices/lab_pin.sym} 840 -230 0 0 {name=l29 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 620 -200 0 1 {name=l30 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 620 100 0 1 {name=l31 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 1040 -230 0 1 {name=l32 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 1040 -100 0 0 {name=l33 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 840 -100 0 1 {name=l34 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 620 -100 0 1 {name=l35 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 620 200 0 1 {name=l36 sig_type=std_logic lab=VNB}
+C {sky130_fd_pr/nfet_01v8.sym} -390 100 1 0 {name=M20
+L=1
+W=1.49
+nf=1 
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} -390 120 1 1 {name=l37 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -390 200 1 1 {name=l38 sig_type=std_logic lab=VGND}
+C {sky130_fd_pr/nfet_01v8.sym} 390 100 1 0 {name=M21
+L=1
+W=1.49
+nf=1 
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} 390 120 1 1 {name=l39 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 390 200 1 1 {name=l40 sig_type=std_logic lab=VGND}
+C {sky130_fd_pr/nfet_01v8.sym} -290 -120 1 0 {name=M22
+L=1
+W=1.49
+nf=1 
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} -290 -100 1 1 {name=l41 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -290 -20 1 1 {name=l42 sig_type=std_logic lab=VGND}
+C {sky130_fd_pr/nfet_01v8.sym} 290 -120 1 0 {name=M23
+L=1
+W=1.49
+nf=1 
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} 290 -100 1 1 {name=l43 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 290 -20 1 1 {name=l44 sig_type=std_logic lab=VGND}

xschem/sky130_sc_ams__comparator_1.sym

diff --git a/xschem/sky130_sc_ams__comparator_1.sym b/xschem/sky130_sc_ams__comparator_1.sym
new file mode 100644
index 0000000..0b15c22
--- /dev/null
+++ b/xschem/sky130_sc_ams__comparator_1.sym
@@ -0,0 +1,38 @@
+v {xschem version=2.9.9 file_version=1.2 }
+G {}
+K {type=subcircuit
+format="@name @pinlist @symname"
+template="name=x1"
+}
+V {}
+S {}
+E {}
+L 4 -70 0 -50 0 {}
+L 4 70 0 90 0 {}
+L 4 -70 30 -50 30 {}
+L 4 -70 -30 -50 -30 {}
+L 4 -50 -60 -50 60 {}
+L 4 -50 60 70 0 {}
+L 4 -50 -60 70 0 {}
+L 4 10 -60 10 -30 {}
+L 4 -10 -60 -10 -40 {}
+L 4 10 30 10 60 {}
+L 4 -10 40 -10 60 {}
+B 5 -72.5 -2.5 -67.5 2.5 {name=CLK dir=in }
+B 5 -72.5 -32.5 -67.5 -27.5 {name=VIN1 dir=in }
+B 5 -72.5 27.5 -67.5 32.5 {name=VIN2 dir=in }
+B 5 7.5 57.5 12.5 62.5 {name=VGND dir=in }
+B 5 -12.5 57.5 -7.5 62.5 {name=VNB dir=in }
+B 5 -12.5 -62.5 -7.5 -57.5 {name=VPB dir=in }
+B 5 7.5 -62.5 12.5 -57.5 {name=VPWR dir=in }
+B 5 87.5 -2.5 92.5 2.5 {name=X dir=out }
+T {@symname} 20.5 -46 0 0 0.3 0.3 {}
+T {@name} -55 -92 0 0 0.2 0.2 {}
+T {CLK} -45 -4 0 0 0.2 0.2 {}
+T {VIN1} -45 -34 0 0 0.2 0.2 {}
+T {VIN2} -45 26 0 0 0.2 0.2 {}
+T {VGND} 15 51 0 0 0.2 0.2 {}
+T {VNB} -35 51 0 0 0.2 0.2 {}
+T {VPB} -35 -64 0 0 0.2 0.2 {}
+T {VPWR} 15 -64 0 0 0.2 0.2 {}
+T {X} 85 -14 0 1 0.2 0.2 {}

xschem/sky130_sc_ams__ota_1.sch

diff --git a/xschem/sky130_sc_ams__ota_1.sch b/xschem/sky130_sc_ams__ota_1.sch
new file mode 100644
index 0000000..6e377c5
--- /dev/null
+++ b/xschem/sky130_sc_ams__ota_1.sch
@@ -0,0 +1,449 @@
+v {xschem version=2.9.9 file_version=1.2 }
+G {}
+K {}
+V {}
+S {}
+E {}
+N -250 -180 -250 -120 { lab=#net1}
+N -350 -210 -290 -210 { lab=#net1}
+N -290 -160 -250 -160 { lab=#net1}
+N 270 -180 270 -120 { lab=#net2}
+N 310 -210 370 -210 { lab=#net2}
+N -310 -160 -290 -160 { lab=#net1}
+N -310 -210 -310 -160 { lab=#net1}
+N 270 -160 330 -160 { lab=#net2}
+N 330 -210 330 -160 { lab=#net2}
+N -380 -240 300 -240 { lab=VPWR}
+N -560 90 -560 120 { lab=#net3}
+N -1060 0 -1020 0 { lab=#net4}
+N -1020 0 -1020 30 { lab=#net4}
+N -1140 60 -1060 60 { lab=VGND}
+N -0 -60 0 -0 { lab=#net5}
+N -560 -180 -560 90 { lab=#net3}
+N -1020 30 -960 30 { lab=#net4}
+N -1020 -210 -960 -210 { lab=#net6}
+N -960 -160 -920 -160 { lab=#net6}
+N -980 -160 -960 -160 { lab=#net6}
+N -980 -210 -980 -160 { lab=#net6}
+N -420 30 -40 30 { lab=#net4}
+N -1060 -180 -1060 0 { lab=#net4}
+N -920 -180 -920 0 { lab=#net6}
+N -1220 -100 -1220 -40 { lab=#net4}
+N -1220 -40 -1060 -40 { lab=#net4}
+N -1220 -160 -980 -160 { lab=#net6}
+N -1360 -240 -1060 -240 { lab=VPWR}
+N -1360 -180 -1360 -130 { lab=#net7}
+N -1360 -130 -1260 -130 { lab=#net7}
+N -1360 -180 -1320 -180 { lab=#net7}
+N -1320 -210 -1320 -180 { lab=#net7}
+N -1360 -130 -1360 0 { lab=#net7}
+N -1360 60 -1140 60 { lab=VGND}
+N -1320 0 -1320 30 { lab=#net4}
+N -1320 0 -1060 0 { lab=#net4}
+N -1060 -240 -1000 -240 { lab=VPWR}
+N -720 120 -560 120 { lab=#net3}
+N -680 150 -680 180 { lab=VGND}
+N -720 180 -680 180 { lab=VGND}
+N -490 -60 -450 -60 { lab=VGND}
+N 170 -240 170 -210 { lab=VPWR}
+N 130 -180 130 -160 { lab=#net2}
+N 410 -180 410 120 { lab=Iout}
+N 130 -160 270 -160 { lab=#net2}
+N -150 -240 -150 -210 { lab=VPWR}
+N -110 -180 -110 -160 { lab=#net1}
+N -250 -160 -110 -160 { lab=#net1}
+N 300 -240 410 -240 { lab=VPWR}
+N -490 -90 -490 -60 { lab=VGND}
+N -450 -120 -250 -120 { lab=#net1}
+N -250 -60 270 -60 { lab=#net5}
+N -520 150 370 150 { lab=#net3}
+N -560 100 -500 100 { lab=#net3}
+N -500 100 -500 150 { lab=#net3}
+N -640 -240 -380 -240 { lab=VPWR}
+N -520 -210 -350 -210 { lab=#net1}
+N -1170 30 -1170 60 { lab=VGND}
+N -1060 -40 -770 -40 { lab=#net4}
+N -1000 -240 -940 -240 { lab=VPWR}
+N -830 -240 -830 -210 { lab=VPWR}
+N -790 -180 -790 -160 { lab=#net6}
+N -920 -160 -790 -160 { lab=#net6}
+N -920 0 -780 0 { lab=#net6}
+N -820 30 -820 60 { lab=VGND}
+N -820 60 -780 60 { lab=VGND}
+N -780 60 -780 120 { lab=VGND}
+N -940 -240 -640 -240 { lab=VPWR}
+N -770 -40 -660 -40 { lab=#net4}
+N -660 -40 -660 30 { lab=#net4}
+N -660 30 -420 30 { lab=#net4}
+N -920 120 -780 120 { lab=VGND}
+C {devices/ipin.sym} 310 -90 0 1 {name=Vin1 lab=Vin1}
+C {devices/ipin.sym} -290 -90 0 0 {name=Vin2 lab=Vin2}
+C {devices/ipin.sym} 0 -320 0 0 {name=p3 lab=VGND}
+C {devices/ipin.sym} 0 -350 0 0 {name=p2 lab=VNB}
+C {devices/ipin.sym} 0 -380 0 0 {name=p1 lab=VPB}
+C {devices/ipin.sym} 0 -410 0 0 {name=p4 lab=VPWR}
+C {devices/opin.sym} 410 -70 0 0 {name=Iout lab=Iout}
+C {sky130_fd_pr/pfet_01v8.sym} 390 -210 0 0 {name=M7
+L=0.30
+W=0.61
+nf=1
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} -540 -210 0 1 {name=M8
+L=0.15
+W=0.61
+nf=1
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} 290 -210 0 1 {name=M9
+L=0.15
+W=0.61
+nf=1
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -20 30 0 0 {name=M1
+L=0.15
+W=0.70
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -1040 30 0 1 {name=M10
+L=0.15
+W=0.70
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -940 30 0 0 {name=M11
+L=0.15
+W=0.70
+nf=1 
+mult=8
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} -940 -210 0 0 {name=M12
+L=0.15
+W=0.61
+nf=1
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} -1040 -210 0 1 {name=M13
+L=0.15
+W=0.61
+nf=1
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -1240 -130 0 0 {name=M14
+L=0.15
+W=0.70
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -1340 30 0 1 {name=M16
+L=0.15
+W=0.70
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -270 -90 0 0 {name=M2
+L=0.15
+W=1.06
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} 290 -90 0 1 {name=M3
+L=0.15
+W=1.06
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} 0 -380 0 1 {name=l7 sig_type=std_logic lab=VPB}
+C {sky130_fd_pr/nfet_01v8.sym} -700 150 0 1 {name=M17
+L=0.15
+W=0.70
+nf=1 
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -470 -90 0 0 {name=M18
+L=0.15
+W=1.06
+nf=1 
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} 150 -210 0 1 {name=M19
+L=0.15
+W=0.61
+nf=1
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/pfet_01v8.sym} -130 -210 0 0 {name=M20
+L=0.15
+W=0.61
+nf=1
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} -540 150 0 1 {name=M4
+L=0.15
+W=0.70
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} -110 -210 0 1 {name=l10 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} -250 -210 0 1 {name=l11 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 410 -210 0 1 {name=l12 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 130 -210 0 0 {name=l13 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 270 -210 0 0 {name=l14 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} -560 -210 0 0 {name=l15 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} -1060 -210 0 0 {name=l16 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} -920 -210 0 1 {name=l18 sig_type=std_logic lab=VPB}
+C {devices/lab_pin.sym} 0 -350 0 1 {name=l19 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -250 -90 0 1 {name=l20 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -450 -90 0 1 {name=l21 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 270 -90 0 0 {name=l22 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 0 30 0 1 {name=l23 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} 410 150 0 1 {name=l24 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -560 150 0 0 {name=l25 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -720 150 0 0 {name=l26 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -920 30 0 1 {name=l27 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -1060 30 0 0 {name=l28 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -1360 30 0 0 {name=l29 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -1220 -130 0 1 {name=l30 sig_type=std_logic lab=VNB}
+C {sky130_fd_pr/nfet_01v8.sym} -1190 30 0 1 {name=M21
+L=0.15
+W=0.70
+nf=1 
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} -1210 30 0 0 {name=l31 sig_type=std_logic lab=VNB}
+C {sky130_fd_pr/pfet_01v8.sym} -810 -210 0 0 {name=M22
+L=0.15
+W=0.61
+nf=1
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} -790 -210 0 1 {name=l32 sig_type=std_logic lab=VPB}
+C {sky130_fd_pr/pfet_01v8.sym} -1340 -210 0 1 {name=M15
+L=4.20
+W=0.42
+nf=1
+mult=1
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} -1360 -210 0 0 {name=l33 sig_type=std_logic lab=VPB}
+C {sky130_fd_pr/nfet_01v8.sym} -800 30 0 0 {name=M23
+L=0.15
+W=0.70
+nf=1 
+mult=2
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} -780 30 0 1 {name=l17 sig_type=std_logic lab=VNB}
+C {devices/lab_pin.sym} -940 90 0 0 {name=l34 sig_type=std_logic lab=VNB}
+C {sky130_fd_pr/res_xhigh_po.sym} -920 90 0 0 {name=R2
+W=1.41
+L=0.70
+model=res_xhigh_po
+spiceprefix=X
+mult=1}
+C {sky130_fd_pr/pfet_01v8.sym} -270 -210 0 0 {name=M6
+L=0.15
+W=0.61
+nf=1
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=pfet_01v8
+spiceprefix=X
+}
+C {sky130_fd_pr/nfet_01v8.sym} 390 150 0 0 {name=M5
+L=0.30
+W=0.70
+nf=1 
+mult=4
+ad="'int((nf+1)/2) * W/nf * 0.29'" 
+pd="'2*int((nf+1)/2) * (W/nf + 0.29)'"
+as="'int((nf+2)/2) * W/nf * 0.29'" 
+ps="'2*int((nf+2)/2) * (W/nf + 0.29)'"
+nrd="'0.29 / W'" nrs="'0.29 / W'"
+sa=0 sb=0 sd=0
+model=nfet_01v8
+spiceprefix=X
+}
+C {devices/lab_pin.sym} 0 -320 0 1 {name=l1 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} 0 -410 0 1 {name=l5 sig_type=std_logic lab=VPWR}
+C {devices/lab_pin.sym} 0 60 3 0 {name=l35 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} 0 -240 3 1 {name=l36 sig_type=std_logic lab=VPWR}
+C {devices/lab_pin.sym} -560 180 3 0 {name=l2 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} 410 180 3 0 {name=l3 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} -720 180 3 0 {name=l8 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} -920 120 3 0 {name=l6 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} -1210 60 3 0 {name=l4 sig_type=std_logic lab=VGND}
+C {devices/lab_pin.sym} -450 -60 3 0 {name=l9 sig_type=std_logic lab=VGND}

xschem/sky130_sc_ams__ota_1.spice

diff --git a/xschem/sky130_sc_ams__ota_1.spice b/xschem/sky130_sc_ams__ota_1.spice
new file mode 100644
index 0000000..6c6fd48
--- /dev/null
+++ b/xschem/sky130_sc_ams__ota_1.spice
@@ -0,0 +1,88 @@
+.include /home/charana/IC/OpenLane/pdks/sky130A/libs.ref/sky130_fd_pr/spice/sky130_fd_pr__nfet_01v8__tt.pm3.spice
+* SPICE3 file created from sky130_sd_ams__ota_1.ext - technology: sky130A
+.subckt sky130_sd_ams__ota_1 Vin1 Vin2 VGND VNB VPB VPWR Iout
+X0 a_599_75# a_1367_29# a_1311_55# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X1 Iout a_4632_123# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=300000u
+X2 a_4632_123# a_4632_123# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X3 VGND a_1367_29# a_3603_47# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X4 a_3603_47# a_1367_29# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X5 VPWR a_2270_413# a_2270_413# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=420000u l=4.2e+06u
+X6 a_599_75# a_1367_29# a_1311_55# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X7 VGND a_3603_375# a_3603_375# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X8 a_3603_375# a_3431_375# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X9 a_1311_55# a_2270_413# a_1367_29# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X10 a_3431_375# Vin2 a_3603_47# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X11 VGND a_3603_375# Iout VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=300000u
+X12 VPWR a_1311_55# a_1311_55# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X13 a_3603_375# a_3431_375# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X14 VPWR a_3431_375# a_3603_375# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X15 VGND VGND a_3431_375# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X16 VPWR a_1311_55# a_1311_55# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X17 a_3431_375# a_3431_375# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X18 a_1367_29# a_1367_29# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X19 a_1367_29# a_1311_55# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X20 Iout a_4632_123# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=300000u
+X21 a_4632_123# a_4632_123# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X22 a_1367_29# a_1367_29# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X23 VPWR a_4632_123# a_4632_123# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X24 a_3603_47# a_1367_29# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X25 a_599_75# a_1367_29# a_1311_55# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X26 a_3431_375# VGND VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X27 a_1367_29# a_2270_413# a_1311_55# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X28 a_1367_29# VGND VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X29 a_3603_47# Vin2 a_3431_375# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X30 a_3603_375# VGND VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X31 a_1367_29# a_1311_55# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X32 VPWR a_3431_375# a_3603_375# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X33 a_599_75# a_1367_29# a_1311_55# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X34 VPWR a_1311_55# a_1367_29# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X35 VPWR VPWR a_3431_375# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X36 VGND a_599_75# VNB sky130_fd_pr__res_xhigh_po w=1.41e+06u l=700000u
+X37 VGND VGND a_1311_55# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X38 VGND a_1367_29# a_3603_47# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X39 a_4632_123# VPWR VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X40 VPWR a_4632_123# Iout VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=300000u
+X41 VPWR VPWR a_4632_123# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X42 a_1311_55# a_1367_29# a_599_75# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X43 VGND a_3603_375# Iout VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=300000u
+X44 VGND a_1367_29# a_2270_413# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X45 VGND VGND a_3603_375# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X46 a_1311_55# a_1367_29# a_599_75# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X47 a_1311_55# a_2270_413# a_1367_29# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X48 VGND a_1367_29# a_1367_29# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X49 a_3603_47# Vin2 a_3431_375# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X50 a_3603_47# Vin1 a_4632_123# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X51 a_3431_375# a_3431_375# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X52 a_4632_123# Vin1 a_3603_47# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X53 VPWR a_1311_55# a_1367_29# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X54 a_1311_55# a_1367_29# a_599_75# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X55 a_2270_413# a_1367_29# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X56 a_1311_55# a_1311_55# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X57 VPWR VPWR a_1311_55# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X58 VPWR a_4632_123# a_4632_123# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X59 VPWR a_4632_123# Iout VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=300000u
+X60 a_3603_375# a_3603_375# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X61 Iout a_3603_375# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=300000u
+X62 a_1311_55# a_1367_29# a_599_75# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X63 a_2270_413# a_1367_29# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X64 a_3431_375# VPWR VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X65 VGND a_1367_29# a_2270_413# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X66 a_4632_123# Vin1 a_3603_47# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X67 a_3603_375# a_3603_375# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X68 a_1311_55# VPWR VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X69 VPWR a_3431_375# a_3431_375# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X70 VPWR a_3431_375# a_3431_375# VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X71 a_1367_29# a_2270_413# a_1311_55# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X72 VGND a_1367_29# a_1367_29# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X73 a_3603_47# Vin1 a_4632_123# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X74 Iout a_3603_375# VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=300000u
+X75 a_3431_375# Vin2 a_3603_47# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=1.06e+06u l=150000u
+X76 a_1311_55# a_1311_55# VPWR VPB sky130_fd_pr__pfet_01v8 ad=0p pd=0u as=0p ps=0u w=610000u l=150000u
+X77 a_1311_55# VGND VGND VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X78 VGND VGND a_1367_29# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+X79 VGND a_3603_375# a_3603_375# VNB sky130_fd_pr__nfet_01v8 ad=0p pd=0u as=0p ps=0u w=700000u l=150000u
+C0 a_599_75# a_1311_55# 2.09fF
+C1 a_3603_47# VGND 2.61fF
+C2 a_1367_29# VGND 2.16fF
+C3 a_1367_29# VNB 2.36fF
+.ends

xschem/sky130_sc_ams__ota_1.sym

diff --git a/xschem/sky130_sc_ams__ota_1.sym b/xschem/sky130_sc_ams__ota_1.sym
new file mode 100644
index 0000000..de2743d
--- /dev/null
+++ b/xschem/sky130_sc_ams__ota_1.sym
@@ -0,0 +1,38 @@
+v {xschem version=2.9.9 file_version=1.2 }
+G {}
+K {type=subcircuit
+format="@name @pinlist @symname"
+template="name=x1"
+}
+V {}
+S {}
+E {}
+L 4 -80 -20 -60 -20 {}
+L 4 -80 20 -60 20 {}
+L 4 -60 -60 -60 60 {}
+L 4 -60 60 60 0 {}
+L 4 -60 -60 60 0 {}
+L 4 -50 -20 -30 -20 {}
+L 4 -40 -30 -40 -10 {}
+L 4 -50 20 -30 20 {}
+L 4 -10 35 -10 60 {}
+L 4 10 25 10 60 {}
+L 4 -10 -60 -10 -35 {}
+L 4 10 -60 10 -25 {}
+L 4 60 -0 80 -0 {}
+B 5 7.5 -62.5 12.5 -57.5 {name=VPWR dir=in }
+B 5 -12.5 -62.5 -7.5 -57.5 {name=VPB dir=in }
+B 5 -12.5 57.5 -7.5 62.5 {name=VNB dir=in }
+B 5 7.5 57.5 12.5 62.5 {name=VGND dir=in }
+B 5 -82.5 -22.5 -77.5 -17.5 {name=Vin1 dir=in }
+B 5 -82.5 17.5 -77.5 22.5 {name=Vin2 dir=in }
+B 5 77.5 -2.5 82.5 2.5 {name=Iout dir=out }
+T {@symname} 22 -46 0 0 0.3 0.3 {}
+T {@name} -65 -82 0 0 0.2 0.2 {}
+T {VPWR} 46.5 -50 2 0 0.2 0.2 {}
+T {VPB} -16 -50 2 0 0.2 0.2 {}
+T {VNB} -36.5 50 0 0 0.2 0.2 {}
+T {VGND} 15 48.5 0 0 0.2 0.2 {}
+T {Vin1} -85 -39 0 0 0.2 0.2 {}
+T {Vin2} -85 26 0 0 0.2 0.2 {}
+T {Iout} 75 -19 0 1 0.2 0.2 {}