| **.subckt tb_csvco_pex_c |
| vss vss GND {vss} |
| vdd vdd vss {vdd} |
| x1 vdd out_ro_n out_ro vss inverter_min_x2 |
| x2 vdd out_ro_buf out_ro_n vss inverter_min_x4 |
| C1 out_ro_buf vss 10f m=1 |
| Vctrl vctrl vss DC {vctrl} |
| VD0 D0 vss DC {vd0} |
| x3 vdd out_ro vctrl vss D0 csvco_pex_c |
| **** begin user architecture code |
| |
| |
| |
| * Parameters |
| .param kp = 1.0 |
| .param vdd = kp*1.8 |
| .param vss = 0.0 |
| .param vin = vdd |
| .param vctrl = 0.0 |
| .param vd0 = 0.0 |
| |
| .options TEMP = 100.0 |
| |
| * Models |
| .lib ~/skywater/skywater-pdk/libraries/sky130_fd_pr_ngspice/latest/models/corners/sky130.lib SS |
| .include ~/caravel_analog_fulgor/xschem/simulations/csvco_pex_c.spice |
| |
| |
| * Data to save |
| .save all |
| |
| .ic v(out_ro) = 0.0 |
| .ic v(x3.out1) = 0.0 |
| .ic v(x3.out2) = 0.0 |
| .ic v(x3.out) = 0.0 |
| |
| * Simulation |
| .control |
| let i = 0.0 |
| while i <= 1.9 |
| tran 0.01ns 50ns |
| meas tran Tosc trig v(out_ro) val=0.9 fall=5 targ v(out_ro) val=0.9 fall=15 |
| meas tran Toscbuf trig v(out_ro_buf) val=0.9 fall=5 targ v(out_ro_buf) val=0.9 fall=15 |
| let T = Tosc/10.0 |
| let Tbuf = Toscbuf/10.0 |
| let f = 1/T |
| let fbuf = 1/Tbuf |
| let Td = 1/(2*3*f) |
| print T Tbuf f fbuf Td |
| let i = i + 0.1 |
| alterparam vctrl = $&i |
| reset |
| end |
| echo . |
| echo ----- Vctrl = 0.0 ----- |
| print tran1.f |
| echo ----- Vctrl = 0.1 ----- |
| print tran2.f |
| echo ----- Vctrl = 0.2 ----- |
| print tran3.f |
| echo ----- Vctrl = 0.3 ----- |
| print tran4.f |
| echo ----- Vctrl = 0.4 ----- |
| print tran5.f |
| echo ----- Vctrl = 0.5 ----- |
| print tran6.f |
| echo ----- Vctrl = 0.6 ----- |
| print tran7.f |
| echo ----- Vctrl = 0.7 ----- |
| print tran8.f |
| echo ----- Vctrl = 0.8 ----- |
| print tran9.f |
| echo ----- Vctrl = 0.9 ----- |
| print tran10.f |
| echo ----- Vctrl = 1.0 ----- |
| print tran11.f |
| echo ----- Vctrl = 1.1 ----- |
| print tran12.f |
| echo ----- Vctrl = 1.2 ----- |
| print tran13.f |
| echo ----- Vctrl = 1.3 ----- |
| print tran14.f |
| echo ----- Vctrl = 1.4 ----- |
| print tran15.f |
| echo ----- Vctrl = 1.5 ----- |
| print tran16.f |
| echo ----- Vctrl = 1.6 ----- |
| print tran17.f |
| echo ----- Vctrl = 1.7 ----- |
| print tran18.f |
| echo ----- Vctrl = 1.8 ----- |
| print tran19.f |
| |
| *plot tran1.f tran2.f |
| |
| * let i = 0 |
| * let j = 0 |
| * while j < 2 |
| * while i < 2 |
| * tran 0.1ns 100us |
| * meas tran Tosc trig v(out_ro) val=0.9 fall=5 targ v(out_ro) val=0.9 fall=15 |
| * meas tran Toscbuf trig v(out_ro_buf) val=0.9 fall=5 targ v(out_ro_buf) val=0.9 fall=15 |
| * let T = Tosc/10.0 |
| * let Tbuf = Toscbuf/10.0 |
| * let f = 1/T |
| * let fbuf = 1/Tbuf |
| * let Td = 1/(2*3*f) |
| * print T Tbuf f fbuf Td |
| * let i = i + 1 |
| * alterparam vctrl = 1.8 |
| * reset |
| * end |
| * alterparam vctrl = 0.7 |
| * alterparam vd0 = 0.0 |
| * alterparam vd1 = 1.8 |
| * alterparam vd2 = 1.8 |
| * alterpatam vd3 = 0.0 |
| * let i = 0 |
| * let j = j + 1 |
| * reset |
| * end |
| * plot v(tran1.out_ro) v(tran1.out_ro_buf)+2 |
| * plot v(tran2.out_ro) v(tran2.out_ro_buf)+2 |
| * plot v(tran3.out_ro) v(tran3.out_ro_buf)+2 |
| * plot v(tran4.out_ro) v(tran4.out_ro_buf)+2 |
| * print tran1.f tran2.f tran3.f tran4.f |
| * let frange_vtun_0 = tran2.f - tran1.f |
| * let frange_vtun_1 = tran4.f - tran3.f |
| * print frange_vtun_0 frange_vtun_1 |
| .endc |
| |
| |
| |
| **** end user architecture code |
| **.ends |
| |
| * expanding symbol: inverter_min_x2.sym # of pins=4 |
| * sym_path: /home/dhernando/caravel_analog_fulgor/xschem/inverter_min_x2.sym |
| * sch_path: /home/dhernando/caravel_analog_fulgor/xschem/inverter_min_x2.sch |
| .subckt inverter_min_x2 vdd out in vss |
| *.iopin vss |
| *.ipin in |
| *.opin out |
| *.iopin vdd |
| XM2 out in vdd vdd sky130_fd_pr__pfet_01v8 L=0.15 W=0.84 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29' |
| + pd='2*int((nf+1)/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 mult=2 m=2 |
| XM1 out in vss vss sky130_fd_pr__nfet_01v8 L=0.15 W=0.42 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29' |
| + pd='2*int((nf+1)/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 mult=2 m=2 |
| .ends |
| |
| |
| * expanding symbol: inverter_min_x4.sym # of pins=4 |
| * sym_path: /home/dhernando/caravel_analog_fulgor/xschem/inverter_min_x4.sym |
| * sch_path: /home/dhernando/caravel_analog_fulgor/xschem/inverter_min_x4.sch |
| .subckt inverter_min_x4 vdd out in vss |
| *.iopin vss |
| *.ipin in |
| *.opin out |
| *.iopin vdd |
| XM2 out in vdd vdd sky130_fd_pr__pfet_01v8 L=0.15 W=0.84 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29' |
| + pd='2*int((nf+1)/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 mult=4 m=4 |
| XM1 out in vss vss sky130_fd_pr__nfet_01v8 L=0.15 W=0.42 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29' |
| + pd='2*int((nf+1)/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 mult=4 m=4 |
| .ends |
| |
| .GLOBAL GND |
| ** flattened .save nodes |
| .end |
