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diff --git a/lib/sbcs1v8/data/ff_tran_vdda.txt b/lib/sbcs1v8/data/ff_tran_vdda.txt
new file mode 100644
index 0000000..e32af06
--- /dev/null
+++ b/lib/sbcs1v8/data/ff_tran_vdda.txt
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new file mode 100644
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--- /dev/null
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diff --git a/lib/sbcs1v8/data/ss_dc_vdd_io.txt b/lib/sbcs1v8/data/ss_dc_vdd_io.txt
new file mode 100644
index 0000000..bc4bc8e
--- /dev/null
+++ b/lib/sbcs1v8/data/ss_dc_vdd_io.txt
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diff --git a/lib/sbcs1v8/data/ss_tran_io.txt b/lib/sbcs1v8/data/ss_tran_io.txt
new file mode 100644
index 0000000..5e00702
--- /dev/null
+++ b/lib/sbcs1v8/data/ss_tran_io.txt
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diff --git a/lib/sbcs1v8/data/ss_tran_vdda.txt b/lib/sbcs1v8/data/ss_tran_vdda.txt
new file mode 100644
index 0000000..0b0f821
--- /dev/null
+++ b/lib/sbcs1v8/data/ss_tran_vdda.txt
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new file mode 100644
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--- /dev/null
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diff --git a/lib/sbcs1v8/data/tt_dc_vdd_io.txt b/lib/sbcs1v8/data/tt_dc_vdd_io.txt
new file mode 100644
index 0000000..0c43812
--- /dev/null
+++ b/lib/sbcs1v8/data/tt_dc_vdd_io.txt
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diff --git a/lib/sbcs1v8/data/tt_tran_io.txt b/lib/sbcs1v8/data/tt_tran_io.txt
new file mode 100644
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+ 1.84873452e-05 2.73144818e-07
+ 1.85873452e-05 2.69003264e-07
+ 1.86873452e-05 2.73145035e-07
+ 1.87873452e-05 2.69003164e-07
+ 1.88873452e-05 2.73145304e-07
+ 1.89873452e-05 2.69003149e-07
+ 1.90873452e-05 2.73145617e-07
+ 1.91873452e-05 2.69003206e-07
+ 1.92873452e-05 2.73145966e-07
+ 1.93873452e-05 2.69003324e-07
+ 1.94873452e-05 2.73146345e-07
+ 1.95873452e-05 2.69003496e-07
+ 1.96873452e-05 2.73146748e-07
+ 1.97873452e-05 2.69003711e-07
+ 1.98873452e-05 2.73147170e-07
+ 1.99873452e-05 2.69003964e-07
+ 2.00000000e-05 2.73147682e-07
diff --git a/lib/sbcs1v8/data/tt_tran_vdda.txt b/lib/sbcs1v8/data/tt_tran_vdda.txt
new file mode 100644
index 0000000..ccba8b7
--- /dev/null
+++ b/lib/sbcs1v8/data/tt_tran_vdda.txt
@@ -0,0 +1,218 @@
+ 0.00000000e+00 1.00000000e-02
+ 1.00000000e-09 1.17900000e-02
+ 2.00000000e-09 1.35800000e-02
+ 4.00000000e-09 1.71600000e-02
+ 8.00000000e-09 2.43200000e-02
+ 1.60000000e-08 3.86400000e-02
+ 3.20000000e-08 6.72800000e-02
+ 6.40000000e-08 1.24560000e-01
+ 1.28000000e-07 2.39120000e-01
+ 2.28000000e-07 4.18120000e-01
+ 3.28000000e-07 5.97120000e-01
+ 4.28000000e-07 7.76120000e-01
+ 5.28000000e-07 9.55120000e-01
+ 6.28000000e-07 1.13412000e+00
+ 7.28000000e-07 1.31312000e+00
+ 8.28000000e-07 1.49212000e+00
+ 9.28000000e-07 1.67112000e+00
+ 9.37000000e-07 1.68723000e+00
+ 9.55000000e-07 1.71945000e+00
+ 9.91000000e-07 1.78389000e+00
+ 1.00000000e-06 1.80000000e+00
+ 1.00365151e-06 1.80000000e+00
+ 1.01095453e-06 1.80000000e+00
+ 1.02556058e-06 1.80000000e+00
+ 1.04574027e-06 1.80000000e+00
+ 1.07170873e-06 1.80000000e+00
+ 1.09742239e-06 1.80000000e+00
+ 1.14098077e-06 1.80000000e+00
+ 1.19310824e-06 1.80000000e+00
+ 1.28734523e-06 1.80000000e+00
+ 1.38734523e-06 1.80000000e+00
+ 1.48734523e-06 1.80000000e+00
+ 1.58734523e-06 1.80000000e+00
+ 1.68734523e-06 1.80000000e+00
+ 1.78734523e-06 1.80000000e+00
+ 1.88734523e-06 1.80000000e+00
+ 1.98734523e-06 1.80000000e+00
+ 2.08734523e-06 1.80000000e+00
+ 2.18734523e-06 1.80000000e+00
+ 2.28734523e-06 1.80000000e+00
+ 2.38734523e-06 1.80000000e+00
+ 2.48734523e-06 1.80000000e+00
+ 2.58734523e-06 1.80000000e+00
+ 2.68734523e-06 1.80000000e+00
+ 2.78734523e-06 1.80000000e+00
+ 2.88734523e-06 1.80000000e+00
+ 2.98734523e-06 1.80000000e+00
+ 3.08734523e-06 1.80000000e+00
+ 3.18734523e-06 1.80000000e+00
+ 3.28734523e-06 1.80000000e+00
+ 3.38734523e-06 1.80000000e+00
+ 3.48734523e-06 1.80000000e+00
+ 3.58734523e-06 1.80000000e+00
+ 3.68734523e-06 1.80000000e+00
+ 3.78734523e-06 1.80000000e+00
+ 3.88734523e-06 1.80000000e+00
+ 3.98734523e-06 1.80000000e+00
+ 4.08734523e-06 1.80000000e+00
+ 4.18734523e-06 1.80000000e+00
+ 4.28734523e-06 1.80000000e+00
+ 4.38734523e-06 1.80000000e+00
+ 4.48734523e-06 1.80000000e+00
+ 4.58734523e-06 1.80000000e+00
+ 4.68734523e-06 1.80000000e+00
+ 4.78734523e-06 1.80000000e+00
+ 4.88734523e-06 1.80000000e+00
+ 4.98734523e-06 1.80000000e+00
+ 5.08734523e-06 1.80000000e+00
+ 5.18734523e-06 1.80000000e+00
+ 5.28734523e-06 1.80000000e+00
+ 5.38734523e-06 1.80000000e+00
+ 5.48734523e-06 1.80000000e+00
+ 5.58734523e-06 1.80000000e+00
+ 5.68734523e-06 1.80000000e+00
+ 5.78734523e-06 1.80000000e+00
+ 5.88734523e-06 1.80000000e+00
+ 5.98734523e-06 1.80000000e+00
+ 6.08734523e-06 1.80000000e+00
+ 6.18734523e-06 1.80000000e+00
+ 6.28734523e-06 1.80000000e+00
+ 6.38734523e-06 1.80000000e+00
+ 6.48734523e-06 1.80000000e+00
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+ 8.48734523e-06 1.80000000e+00
+ 8.58734523e-06 1.80000000e+00
+ 8.68734523e-06 1.80000000e+00
+ 8.78734523e-06 1.80000000e+00
+ 8.88734523e-06 1.80000000e+00
+ 8.98734523e-06 1.80000000e+00
+ 9.08734523e-06 1.80000000e+00
+ 9.18734523e-06 1.80000000e+00
+ 9.28734523e-06 1.80000000e+00
+ 9.38734523e-06 1.80000000e+00
+ 9.48734523e-06 1.80000000e+00
+ 9.58734523e-06 1.80000000e+00
+ 9.68734523e-06 1.80000000e+00
+ 9.78734523e-06 1.80000000e+00
+ 9.88734523e-06 1.80000000e+00
+ 9.98734523e-06 1.80000000e+00
+ 1.00873452e-05 1.80000000e+00
+ 1.01873452e-05 1.80000000e+00
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+ 1.76873452e-05 1.80000000e+00
+ 1.77873452e-05 1.80000000e+00
+ 1.78873452e-05 1.80000000e+00
+ 1.79873452e-05 1.80000000e+00
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+ 1.85873452e-05 1.80000000e+00
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+ 1.90873452e-05 1.80000000e+00
+ 1.91873452e-05 1.80000000e+00
+ 1.92873452e-05 1.80000000e+00
+ 1.93873452e-05 1.80000000e+00
+ 1.94873452e-05 1.80000000e+00
+ 1.95873452e-05 1.80000000e+00
+ 1.96873452e-05 1.80000000e+00
+ 1.97873452e-05 1.80000000e+00
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+ 1.99873452e-05 1.80000000e+00
+ 2.00000000e-05 1.80000000e+00
diff --git a/lib/sbcs1v8/ngspice/sbcs1v8_tb.spice b/lib/sbcs1v8/ngspice/sbcs1v8_tb.spice
deleted file mode 100644
index e966470..0000000
--- a/lib/sbcs1v8/ngspice/sbcs1v8_tb.spice
+++ /dev/null
@@ -1,27 +0,0 @@
-* Self-biased current source testbench
-
-* Include SkyWater sky130 device models
-.lib "/usr/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice" tt
-.param mc_mm_switch=0
-
-.include "../mag/sbcs1v8.spice"
-
-* supply voltages
-vdda vdda 0 1.8
-vssa vssa 0 0.0
-
-* DUT
-x0 io vdda vssa x sbcs1v8
-vo io vssa 0.0
-
-.option gmin=1e-13
-.control
- dc vdda 10m 1.8 10m
- plot i(vo)
- plot abs(deriv(i(vo))/i(vo)) ylog
-
- dc temp -40 125 1
- plot i(vo)
-.endc
-
-.end
diff --git a/lib/sbcs1v8/ngspice/sbcs1v8_tb_ff.spice b/lib/sbcs1v8/ngspice/sbcs1v8_tb_ff.spice
new file mode 100644
index 0000000..1dffed4
--- /dev/null
+++ b/lib/sbcs1v8/ngspice/sbcs1v8_tb_ff.spice
@@ -0,0 +1,47 @@
+* Self-biased current source testbench - SS corner
+
+* Include SkyWater sky130 device models
+.lib "/usr/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice" ff
+.param mc_mm_switch=0
+
+.include "../mag/sbcs1v8.spice"
+
+* supply voltages
+vdda vdda 0 1.8 pulse(10m 1.8 0 1u 10u 10 1)
+vssa vssa 0 0.0
+
+* DUT
+x0 io vdda vssa x sbcs1v8
+vo io vssa 0.0
+
+.option gmin=1e-12
+.control
+ dc vdda 10m 1.8 10m
+ let dc_vdd_io = i(vo)
+ plot dc_vdd_io ylimit 0 500n
+ wrdata ../data/ff_dc_vdd_io.txt dc_vdd_io
+ let psrr = abs(deriv(i(vo))/i(vo))
+ plot dc_vdd_psrr ylog
+ wrdata ../data/ff_dc_vdd_psrr.txt dc_vdd_psrr
+
+
+ dc temp -40 125 1
+ let dc_temp_io = i(vo)
+ plot dc_temp_io ylimit 220n 360n
+ wrdata ../data/ff_dc_temp_io.txt dc_temp_io
+
+ tran 100n 20u
+ let tran_io = i(vo)
+ plot tran_io ylimit 0 1u
+ plot vdda
+ wrdata ../data/ff_tran_io.txt tran_io
+ wrdata ../data/ff_tran_vdda.txt vdda
+
+ reset
+ op
+ print i(vdda)
+ print i(vo)
+
+.endc
+
+.end
diff --git a/lib/sbcs1v8/ngspice/sbcs1v8_tb_ss.spice b/lib/sbcs1v8/ngspice/sbcs1v8_tb_ss.spice
new file mode 100644
index 0000000..e9b192a
--- /dev/null
+++ b/lib/sbcs1v8/ngspice/sbcs1v8_tb_ss.spice
@@ -0,0 +1,47 @@
+* Self-biased current source testbench - SS corner
+
+* Include SkyWater sky130 device models
+.lib "/usr/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice" ss
+.param mc_mm_switch=0
+
+.include "../mag/sbcs1v8.spice"
+
+* supply voltages
+vdda vdda 0 1.8 pulse(10m 1.8 0 1u 10u 10 1)
+vssa vssa 0 0.0
+
+* DUT
+x0 io vdda vssa x sbcs1v8
+vo io vssa 0.0
+
+.option gmin=1e-12
+.control
+ dc vdda 10m 1.8 10m
+ let dc_vdd_io = i(vo)
+ plot dc_vdd_io ylimit 0 500n
+ wrdata ../data/ss_dc_vdd_io.txt dc_vdd_io
+ let psrr = abs(deriv(i(vo))/i(vo))
+ plot dc_vdd_psrr ylog
+ wrdata ../data/ss_dc_vdd_psrr.txt dc_vdd_psrr
+
+
+ dc temp -40 125 1
+ let dc_temp_io = i(vo)
+ plot dc_temp_io ylimit 220n 360n
+ wrdata ../data/ss_dc_temp_io.txt dc_temp_io
+
+ tran 100n 20u
+ let tran_io = i(vo)
+ plot tran_io ylimit 0 1u
+ plot vdda
+ wrdata ../data/ss_tran_io.txt tran_io
+ wrdata ../data/ss_tran_vdda.txt vdda
+
+ reset
+ op
+ print i(vdda)
+ print i(vo)
+
+.endc
+
+.end
diff --git a/lib/sbcs1v8/ngspice/sbcs1v8_tb_tt.spice b/lib/sbcs1v8/ngspice/sbcs1v8_tb_tt.spice
new file mode 100644
index 0000000..ccac047
--- /dev/null
+++ b/lib/sbcs1v8/ngspice/sbcs1v8_tb_tt.spice
@@ -0,0 +1,47 @@
+* Self-biased current source testbench - TT corner
+
+* Include SkyWater sky130 device models
+.lib "/usr/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice" tt
+.param mc_mm_switch=0
+
+.include "../mag/sbcs1v8.spice"
+
+* supply voltages
+vdda vdda 0 1.8 pulse(10m 1.8 0 1u 10u 10 1)
+vssa vssa 0 0.0
+
+* DUT
+x0 io vdda vssa x sbcs1v8
+vo io vssa 0.0
+
+.option gmin=1e-13
+.control
+ dc vdda 10m 1.8 10m
+ let dc_vdd_io = i(vo)
+ plot dc_vdd_io ylimit 0 500n
+ wrdata ../data/tt_dc_vdd_io.txt dc_vdd_io
+ let psrr = abs(deriv(i(vo))/i(vo))
+ plot dc_vdd_psrr ylog
+ wrdata ../data/tt_dc_vdd_psrr.txt dc_vdd_psrr
+
+
+ dc temp -40 125 1
+ let dc_temp_io = i(vo)
+ plot dc_temp_io ylimit 220n 360n
+ wrdata ../data/tt_dc_temp_io.txt dc_temp_io
+
+ tran 100n 20u
+ let tran_io = i(vo)
+ plot tran_io ylimit 0 1u
+ plot vdda
+ wrdata ../data/tt_tran_io.txt tran_io
+ wrdata ../data/tt_tran_vdda.txt vdda
+
+ reset
+ op
+ print i(vdda)
+ print i(vo)
+
+.endc
+
+.end
diff --git a/lib/sbcs1v8/ngspice/vref_tb.spice b/lib/sbcs1v8/ngspice/vref_tb.spice
deleted file mode 100644
index 057706d..0000000
--- a/lib/sbcs1v8/ngspice/vref_tb.spice
+++ /dev/null
@@ -1,106 +0,0 @@
-* Self-biased current source testbench
-
-* Include SkyWater sky130 device models
-.lib "/usr/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice" tt
-.param mc_mm_switch=0
-
-.include "../mag/sbcs1v8.spice"
-
-* supply voltages
-vdda vdda 0 1.8
-vssa vssa 0 0.0
-
-.subckt p1_2 d g s b
-xd d g x b sky130_fd_pr__pfet_01v8_lvt ad=8e+11p pd=3.6e+06u as=6e+11p ps=2.2e+06u w=1e+06u l=2e+06u m=4
-xs x g s b sky130_fd_pr__pfet_01v8_lvt ad=8e+11p pd=3.6e+06u as=6e+11p ps=2.2e+06u w=1e+06u l=2e+06u m=4
-.ends
-
-.subckt p1_4 d g s b
-xd d g x b p1_2
-xs x g s b p1_2
-.ends
-
-.subckt p1_8 d g s b
-xd d g x b p1_4
-xs x g s b p1_4
-.ends
-
-.subckt p1_16 d g s b
-xd d g x b p1_8
-xs x g s b p1_8
-.ends
-
-.subckt p1_32 d g s b
-xd d g x b p1_16
-xs x g s b p1_16
-.ends
-
-.subckt p1_64 d g s b
-xd d g x b p1_32
-xs x g s b p1_32
-.ends
-
-.subckt p2_2 d g s b
-xl d g s b p1_2
-xr d g s b p1_2
-.ends
-
-.subckt p4_2 d g s b
-xl d g s b p2_2
-xr d g s b p2_2
-.ends
-
-.subckt p8_2 d g s b
-xl d g s b p4_2
-xr d g s b p4_2
-.ends
-
-.subckt p2_4 d g s b
-xl d g s b p1_4
-xr d g s b p1_4
-.ends
-
-.subckt p4_4 d g s b
-xl d g s b p2_4
-xr d g s b p2_4
-.ends
-
-.subckt p2_8 d g s b
-xl d g s b p1_8
-xr d g s b p1_8
-.ends
-
-.subckt buffer in out vdda vssa
-xpa n p out in p1_16
-xpb p p out out p1_16
-xna n n vssa vssa sky130_fd_pr__nfet_01v8_lvt ad=8e+11p pd=3.6e+06u as=6e+11p ps=2.2e+06u w=1e+06u l=2e+06u m=8
-xnb p n vssa vssa sky130_fd_pr__nfet_01v8_lvt ad=8e+11p pd=3.6e+06u as=6e+11p ps=2.2e+06u w=1e+06u l=2e+06u m=8
-is vdda out 100n
-.ends
-
-* DUT
-x0 io vdda vssa x sbcs1v8
-vo io y 0.0
-
-xpa n x y y p1_16
-xpb1 ref ref y y sky130_fd_pr__pfet_01v8_lvt ad=8e+11p pd=3.6e+06u as=6e+11p ps=2.2e+06u w=1e+06u l=2e+06u m=64
-xna n n vssa vssa sky130_fd_pr__nfet_01v8_lvt ad=8e+11p pd=3.6e+06u as=6e+11p ps=2.2e+06u w=1e+06u l=2e+06u m=8
-xnb ref n vssa vssa sky130_fd_pr__nfet_01v8_lvt ad=8e+11p pd=3.6e+06u as=6e+11p ps=2.2e+06u w=1e+06u l=2e+06u m=8
-
-x1 ref ref0 vdda vssa buffer
-
-.option gmin=1e-13
-.control
- dc vdda 10m 1.95 10m
- plot x ref
- plot i(vo)
- plot abs(deriv(ref)/ref) ylog
-
- dc temp -40 125 1
- meas dc r27 find ref at=27
- let refN = ref/r27
- plot refN
-
-.endc
-
-.end
