Version 4 SHEET 1 1224 816 WIRE 368 16 368 -16 WIRE -48 80 -48 16 WIRE 368 112 368 96 WIRE 512 112 368 112 WIRE 528 112 512 112 WIRE 656 112 576 112 WIRE 688 112 656 112 WIRE 368 128 368 112 WIRE 368 144 368 128 WIRE 688 176 688 112 WIRE 304 192 256 192 WIRE -48 208 -48 160 WIRE -48 208 -112 208 WIRE 256 208 256 192 WIRE -112 224 -112 208 WIRE -48 256 -48 208 WIRE 176 256 112 256 WIRE 192 256 176 256 WIRE 368 256 368 240 WIRE 368 256 240 256 WIRE 368 272 368 256 WIRE 112 304 112 256 WIRE 688 304 688 256 WIRE -48 400 -48 336 WIRE 112 400 112 384 WIRE 368 400 368 352 FLAG 368 -16 VCC FLAG 368 400 VEE FLAG -112 224 0 FLAG -48 16 VCC FLAG -48 400 VEE FLAG 368 256 C FLAG 368 128 E FLAG 256 208 0 FLAG 112 400 0 FLAG 688 304 0 FLAG 112 256 OUT FLAG 656 112 IN SYMBOL voltage -48 64 R0 SYMATTR InstName Vps1 SYMATTR Value 10V SYMBOL res 352 0 R0 SYMATTR InstName RE SYMATTR Value 10k SYMBOL res 352 256 R0 SYMATTR InstName RC SYMATTR Value 5k SYMBOL voltage -48 240 R0 SYMATTR InstName Vps2 SYMATTR Value 10V SYMBOL pnp 304 240 M180 SYMATTR InstName Q1 SYMATTR Value pnp_ideal_transistor SYMBOL res 96 288 R0 SYMATTR InstName RC1 SYMATTR Value 100Meg SYMBOL cap 240 240 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 100µF SYMBOL cap 576 96 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 100µF SYMBOL voltage 688 160 R0 SYMATTR InstName Vi SYMATTR Value PULSE({-Amp} {Amp} 0 0.5ms 0.5ms 0 1ms) TEXT 160 576 Left 2 !.TRAN 100us 14ms 10ms 100us TEXT -24 528 Left 2 !.model pnp_ideal_transistor pnp (Is=1.8104e-15 Bf=100 Vaf=100V) TEXT 168 632 Left 2 !.STEP param Amp LIST 10mV 20mV