Version 4 SHEET 1 1224 816 WIRE 0 128 0 64 WIRE 432 144 432 80 WIRE 432 160 432 144 WIRE 288 176 288 80 WIRE 384 176 288 176 WIRE 0 256 0 208 WIRE 432 272 432 256 WIRE 432 288 432 272 WIRE 432 416 432 368 FLAG 432 416 0 FLAG 432 80 VDD FLAG 0 256 0 FLAG 0 64 VDD FLAG 432 144 S FLAG 432 272 D FLAG 288 80 VDD SYMBOL voltage 0 112 R0 SYMATTR InstName Vps1 SYMATTR Value 5V SYMBOL res 416 272 R0 SYMATTR InstName RD SYMATTR Value 5k SYMBOL pmos 384 256 M180 SYMATTR InstName M1 SYMATTR Value pmos_depletion_mosfet L=10u W=10u TEXT 376 512 Left 2 !.OP TEXT 40 464 Left 2 !.model pmos_depletion_mosfet pmos (kp=1m Vto=+1V lambda=0.02)