| **.subckt sawgen-fet |
| V1 VDD GND 10 |
| M1 vt vd GND 2N7002 m=1 |
| M2 vd vt saw BSS84 m=1 |
| R1 VDD vt 10k m=1 |
| R2 vt GND 10k m=1 |
| C2 saw GND 10n m=1 |
| Q1 saw vcur net2 2N3906 area=1 m=1 |
| R3 VDD vcur 1k m=1 |
| R4 vcur GND 5k m=1 |
| R7 net1 net2 1k m=1 |
| Va net3 GND 0 |
| Vb VDD net1 0 |
| V2 GND VEE 10 |
| M3 vd vd net3 2N7002 m=1 |
| **** begin user architecture code |
| |
| |
| .model BSS84 VDMOS(pchan Rg=3 Vto=-2.1 Rd=2.4 Rs=1.8 Rb=3 Kp=.2 Cgdmax=.04n Cgdmin=.001n Cgs=.02n |
| + Cjo=.01n Is=2p mfg=Philips Vds=-50 Ron=6000m Qg=1n) |
| .model 2N7002 VDMOS(Rg=3 Vto=1.6 Rd=0 Rs=.75 Rb=.14 Kp=.17 mtriode=1.25 Cgdmax=80p Cgdmin=12p |
| + Cgs=50p Cjo=50p Is=.04p mfg=Fairchild Vds=60 Ron=2 Qg=1.5n) |
| |
| |
| .model 2N3904 NPN(IS=1E-14 VAF=100 Bf=300 IKF=0.4 XTB=1.5 BR=4 CJC=4E-12 CJE=8E-12 RB=20 RC=0.1 |
| + RE=0.1 TR=250E-9 TF=350E-12 ITF=1 VTF=2 XTF=3 Vceo=40 Icrating=200m mfg=Philips) |
| |
| .model 2N3906 PNP(IS=1E-14 VAF=100 BF=200 IKF=0.4 XTB=1.5 BR=4 CJC=4.5E-12 CJE=10E-12 RB=20 |
| + RC=0.1 RE=0.1 TR=250E-9 TF=350E-12 ITF=1 VTF=2 XTF=3 Vceo=40 Icrating=200m mfg=Philips) |
| |
| //.lib /usr/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice tt |
| //.include /usr/share/pdk/sky130A/libs.ref/sky130_fd_sc_hvl/spice/sky130_fd_sc_hvl.spice |
| |
| |
| .ic V(saw)=0 |
| .control |
| tran 1n 200u |
| plot V(saw) V(Vt) V(vd) |
| //plot V(vd) |
| //plot I(Vb) |
| .endc |
| |
| **** end user architecture code |
| **.ends |
| .GLOBAL VDD |
| .GLOBAL GND |
| .GLOBAL VEE |
| ** flattened .save nodes |
| .end |
