Version 4 SHEET 1 1108 680 WIRE 640 -48 480 -48 WIRE 832 -48 704 -48 WIRE -48 64 -496 64 WIRE 240 64 -48 64 WIRE 368 64 240 64 WIRE 448 64 368 64 WIRE 480 64 480 -48 WIRE 480 64 448 64 WIRE 512 64 480 64 WIRE 528 64 512 64 WIRE 688 64 608 64 WIRE 720 64 688 64 WIRE 832 64 832 -48 WIRE 832 64 800 64 WIRE 896 64 832 64 WIRE 896 80 896 64 WIRE 448 96 448 64 WIRE 800 96 800 64 WIRE 176 112 128 112 WIRE 688 112 688 64 WIRE 128 160 128 112 WIRE 240 192 240 160 WIRE 448 192 448 160 WIRE 448 192 240 192 WIRE 528 192 528 112 WIRE 528 192 448 192 WIRE 240 208 240 192 WIRE 368 208 368 64 WIRE 528 224 528 192 WIRE 128 256 128 224 WIRE 240 320 240 288 WIRE 368 320 368 288 WIRE 368 320 240 320 WIRE -48 384 -48 64 WIRE 240 464 240 320 WIRE -48 512 -48 448 WIRE -16 512 -48 512 WIRE 176 512 64 512 FLAG -496 224 0 FLAG 800 160 0 FLAG 128 336 0 FLAG 688 176 0 FLAG 896 160 0 FLAG 240 560 0 FLAG 528 288 0 SYMBOL voltage -496 128 R0 WINDOW 0 33 20 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(0 12 10m 5m 5m 70m 120m) SYMBOL voltage -496 48 R0 WINDOW 3 -88 392 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 6 30m 0 0 30m) SYMATTR InstName V2 SYMBOL zener 144 224 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value BZX84C15L SYMBOL res 112 240 R0 SYMATTR InstName R1 SYMATTR Value 1k SYMBOL pmos 608 112 M270 SYMATTR InstName M1 SYMATTR Value IRF9640 SYMBOL res 880 64 R0 SYMATTR InstName R3 SYMATTR Value 100 SYMBOL pnp 176 64 R0 SYMATTR InstName Q2 SYMATTR Value BC856B SYMBOL res 224 192 R0 SYMATTR InstName R5 SYMATTR Value 10k SYMBOL ind 816 48 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName L1 SYMATTR Value 100µ SYMBOL schottky 704 176 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value MBRS140 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 784 96 R0 SYMATTR InstName C1 SYMATTR Value 47µ SYMBOL zener -32 448 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D3 SYMATTR Value BZX84C8V2L SYMBOL res 80 496 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 10k SYMBOL npn 176 464 R0 SYMATTR InstName Q1 SYMATTR Value BC846B SYMBOL res 352 192 R0 SYMATTR InstName R6 SYMATTR Value 10k SYMBOL cap 432 96 R0 SYMATTR InstName C2 SYMATTR Value 100n SYMBOL schottky 544 288 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D4 SYMATTR Value MBRS140 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 704 -64 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D5 SYMATTR Value MBRS140 SYMATTR Description Diode SYMATTR Type diode TEXT -592 480 Left 2 !.tran 0 0.1 0 0.0001