xschem/FB1

v {xschem version=2.9.9 file_version=1.2 }
G {}
K {}
V {}
S {}
E {}
T {NMOS Characterization
} 20 -260 0 0 0.4 0.4 {}
N 90 -100 90 -90 { lab=vg}
N 90 -100 130 -100 { lab=vg}
N 170 -150 170 -130 { lab=vd}
N 170 -150 260 -150 { lab=vd}
N 260 -150 260 -130 { lab=vd}
N 80 -140 90 -140 { lab=vg}
N 70 -140 80 -140 { lab=vg}
N 60 -140 70 -140 { lab=vg}
N 60 -140 60 -100 { lab=vg}
N 60 -100 90 -100 { lab=vg}
N 160 -150 170 -150 { lab=vd}
N 160 -170 160 -150 { lab=vd}
N 160 -170 190 -170 { lab=vd}
C {sky130_fd_pr/nfet3_01v8.sym} 150 -100 0 0 {name=M1
L=0.15
W=1
body=GND
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/code_shown.sym} 360 -240 0 0 {name=NGSPICE 
only_toplevel=false 
value=".option TEMP=27C

.dc v2 0 3 0.01

.control
  set color0 = rgb:f/f/f
  alter @v1[dc] = 1
  print @m.xm1.msky130_fd_pr__nfet_01v8[vdsat]
  run
  alter @v1[dc] = 1.2
  print @m.xm1.msky130_fd_pr__nfet_01v8[vdsat]
  run
  alter @v1[dc] = 1.4
  print @m.xm1.msky130_fd_pr__nfet_01v8[vdsat]
  run
  alter @v1[dc] = 1.8
  print @m.xm1.msky130_fd_pr__nfet_01v8[vdsat]
  run
  alter @v1[dc] = 2
  print @m.xm1.msky130_fd_pr__nfet_01v8[vdsat]
  run

  plot (-dc1.i(v2)) (-dc2.i(v2)) (-dc3.i(v2)) (-dc4.i(v2)) (-dc5.i(v2))

.endc

.save all
"}
C {devices/code.sym} -170 -290 0 0 {name=TT_MODELS
only_toplevel=true
format="tcleval( @value )"
value="** manual skywater pdks install (with patches applied)
* .lib \\\\$::SKYWATER_MODELS\\\\/models/sky130.lib.spice tt

** opencircuitdesign pdks install
.lib \\\\$::SKYWATER_MODELS\\\\/sky130.lib.spice tt

.param mc_mm_switch=0
.param mc_pr_switch=0
"
spice_ignore=false}
C {devices/gnd.sym} 170 -70 0 0 {name=l1 lab=GND}
C {devices/vsource.sym} 90 -60 0 0 {name=v1 value=1}
C {devices/vsource.sym} 260 -100 0 0 {name=v2 value=0
}
C {devices/gnd.sym} 90 -30 0 0 {name=l2 lab=GND}
C {devices/gnd.sym} 260 -70 0 0 {name=l3 lab=GND}
C {devices/opin.sym} 70 -140 0 0 {name=vg lab=vg}
C {devices/opin.sym} 170 -170 0 0 {name=vd lab=vd}
C {invert.sym} 660 140 0 0 {}