Version 4 SHEET 1 1376 680 WIRE 160 -160 -240 -160 WIRE 416 -160 160 -160 WIRE 160 -80 160 -160 WIRE 416 -16 416 -160 WIRE 160 32 160 0 WIRE 192 32 160 32 WIRE 224 32 192 32 WIRE 352 32 304 32 WIRE 160 80 160 32 WIRE 544 80 416 80 WIRE 624 80 544 80 WIRE 160 160 160 144 WIRE 256 160 160 160 WIRE 336 160 256 160 WIRE 544 160 544 80 WIRE 160 176 160 160 WIRE 624 176 624 80 WIRE 0 256 -112 256 WIRE 48 256 0 256 WIRE 112 256 48 256 WIRE -240 272 -240 -160 WIRE -112 272 -112 256 WIRE 336 272 336 160 WIRE 48 320 48 256 WIRE 144 320 48 320 WIRE 272 320 224 320 FLAG 160 272 0 FLAG -112 352 0 FLAG -240 352 0 FLAG 544 240 0 FLAG 624 240 0 FLAG 112 32 Ztop FLAG 624 80 Vout FLAG 0 256 Pulse FLAG 192 32 Ztop FLAG 336 368 0 FLAG 256 160 Zbot SYMBOL nmos 112 176 R0 SYMATTR InstName M1 SYMBOL zener 176 144 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value DFLZ33 SYMBOL res 144 -96 R0 SYMATTR InstName R1 SYMATTR Value 10k SYMBOL res 320 16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 1k SYMBOL npn 352 -16 R0 SYMATTR InstName Q1 SYMBOL voltage -112 256 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(0 5 1ms 0 0 1ms 2) SYMBOL voltage -240 256 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 40 SYMBOL res 528 144 R0 SYMATTR InstName R3 SYMATTR Value 1k SYMBOL cap 608 176 R0 SYMATTR InstName C1 SYMATTR Value 0.1µf SYMBOL npn 272 272 R0 SYMATTR InstName Q2 SYMBOL res 240 304 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 1k TEXT -272 376 Left 2 !.tran 3ms TEXT 488 -136 Left 2 ;Simulation of power supply circuitry from C&F.\nThis circuit did not appear that it could work as intended,\nand this simulation proves that is the case.