visionvlsi
commented
2 years ago The following is the nmos inverter netlist
sch_path: /usr/local/share/pdk/sky130A/libs.tech/xschem/sky130_tests/test_nmos.sch .subckt test_nmos G1v8 D1v8 B .ipin G1v8 .ipin D1v8 .ipin B Vd1 D1v8 net1 0 .save i(vd1) Vd3 D3v3 net2 0 .save i(vd3) Vd2 D1v8 net3 0 .save i(vd2) Vd4 D5v0 net4 0 .save i(vd4) E1 D5v0 0 D1v8 0 '5/1.8' E2 D3v3 0 D1v8 0 '3.3/1.8' E3 G5v0 0 G1v8 0 '5/1.8' E4 G3v3 0 G1v8 0 '3.3/1.8' Vd5 D10v5 net5 0 .save i(vd5) E5 D10v5 0 D1v8 0 '10.5/1.8' E6 D16v0 0 D1v8 0 '16.0/1.8' Vd6 D16v0 net6 0 .save i(vd6) Vd7 D1v8 net7 0 .save i(vd7) E7 D20v0 0 D1v8 0 '20.0/1.8' XM1 net1 G1v8 S B sky130_fd_pr__nfet_01v8_lvt L=0.15 W=1 nf=1 ad='int((nf+1)/2) W/nf 0.29' as='int((nf+2)/2) W/nf * 0.29'
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pd='2int((nf+1)/2) (W/nf + 0.29)' ps='2int((nf+2)/2) (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'
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sa=0 sb=0 sd=0 mult=1 m=1 XM2 net3 G1v8 S B sky130_fd_pr__nfet_01v8 L=0.15 W=1 nf=1 ad='int((nf+1)/2) W/nf 0.29' as='int((nf+2)/2) W/nf 0.29'
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pd='2int((nf+1)/2) (W/nf + 0.29)' ps='2int((nf+2)/2) (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'
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sa=0 sb=0 sd=0 mult=1 m=1 XM3 net2 G3v3 S B sky130_fd_pr__nfet_03v3_nvt L=0.5 W=1 nf=1 ad='int((nf+1)/2) W/nf 0.29' as='int((nf+2)/2) W/nf 0.29'
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pd='2int((nf+1)/2) (W/nf + 0.29)' ps='2int((nf+2)/2) (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'
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sa=0 sb=0 sd=0 mult=1 m=1 XM4 net4 G5v0 S B sky130_fd_pr__nfet_05v0_nvt L=0.9 W=1 nf=1 ad='int((nf+1)/2) W/nf 0.29' as='int((nf+2)/2) W/nf 0.29'
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pd='2int((nf+1)/2) (W/nf + 0.29)' ps='2int((nf+2)/2) (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'
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sa=0 sb=0 sd=0 mult=1 m=1 XM5 net5 G5v0 S B sky130_fd_pr__nfet_g5v0d10v5 L=0.5 W=1 nf=1 ad='int((nf+1)/2) W/nf 0.29' as='int((nf+2)/2) W/nf 0.29'
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pd='2int((nf+1)/2) (W/nf + 0.29)' ps='2int((nf+2)/2) (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'
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sa=0 sb=0 sd=0 mult=1 m=1 XM6 net6 G5v0 S B sky130_fd_pr__nfet_g5v0d16v0 L=0.7 W=5.0 nf=1 ad='int((nf+1)/2) W/nf 0.29' as='int((nf+2)/2) W/nf 0.29'
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pd='2int((nf+1)/2) (W/nf + 0.29)' ps='2int((nf+2)/2) (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'
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sa=0 sb=0 sd=0 mult=1 m=1 Vd8 D1v8 net8 0 .save i(vd8) XM7 net7 G1v8 S B sky130_fd_pr__nfet_20v0 L=2.95 W=29.41 m=1 XM16 net8 G1v8 S B sky130_fd_pr__nfet_20v0_zvt W=30 L=5 m=1 **** begin user architecture code
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this option enables mos model bin
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selection based on W/NF instead of W .option wnflag=1 *.option savecurrents vg G1v8 0 1.8 vs s 0 0 vd D1v8 0 1.8 vb b 0 0 .control save @m.xm1.msky130_fd_pr__nfet_01v8_lvt[gm] save all dc vd 0 1.8 0.0005 vg 0 1.8 0.2 write test_nmos.raw
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dc vd 0 1.8 0.001 vg 0 1.2 0.1 plot all.vd1#branch vs D1v8 plot all.vd2#branch vs D1v8 plot all.vd3#branch vs D3v3 plot all.vd4#branch vs D5v0 plot all.vd5#branch vs D10v5 *plot all.vd6#branch vs D16v0 plot all.vd8#branch vs D1v8 plot all.vd7#branch vs D1v8 set appendwrite op write test_nmos.raw .endc
** opencircuitdesign pdks install .lib /usr/local/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice tt
** end user architecture code .ends .end
StefanSchippers
I have followed the latest video tutorial. And followed the old video tutorial for ngspice. After launching the tool by typing xschem, after clicking on the netlist then i clicked simulate, but nothing happens. whereas .spice file been created in simulations folder.