Version 4 SHEET 1 6664 1652 WIRE -128 -368 -160 -368 WIRE 32 -368 -128 -368 WIRE 128 -368 32 -368 WIRE 192 -368 128 -368 WIRE 320 -368 288 -368 WIRE 368 -368 320 -368 WIRE 480 -368 448 -368 WIRE 544 -368 480 -368 WIRE 608 -368 544 -368 WIRE 688 -368 608 -368 WIRE 800 -368 688 -368 WIRE 848 -368 800 -368 WIRE 128 -336 128 -368 WIRE 480 -336 480 -368 WIRE 544 -336 544 -368 WIRE 320 -320 320 -368 WIRE 688 -272 688 -368 WIRE 800 -272 800 -368 WIRE 128 -224 128 -272 WIRE 320 -224 320 -256 WIRE 320 -224 128 -224 WIRE 480 -224 480 -272 WIRE 480 -224 320 -224 WIRE 544 -224 544 -272 WIRE 544 -224 480 -224 WIRE 240 -192 240 -304 WIRE 544 -192 544 -224 WIRE 208 -112 208 -176 WIRE 240 -80 240 -96 WIRE 192 16 192 -112 WIRE 240 16 240 0 WIRE 240 16 192 16 WIRE 32 64 32 -368 WIRE 48 64 32 64 WIRE 352 64 128 64 WIRE 384 64 352 64 WIRE 608 64 608 -368 WIRE 608 64 464 64 WIRE -160 96 -160 -368 WIRE 240 96 240 16 WIRE 320 144 304 144 WIRE 352 144 352 64 WIRE 352 144 320 144 WIRE 368 144 352 144 WIRE 448 192 432 192 WIRE 688 192 688 -208 WIRE 688 192 528 192 WIRE 688 224 688 192 WIRE -160 336 -160 176 WIRE 240 336 240 192 WIRE 368 336 368 240 WIRE 688 336 688 304 FLAG -160 336 0 FLAG 800 -192 0 FLAG 544 -192 0 FLAG 368 336 0 FLAG 240 336 0 FLAG 688 336 0 FLAG 848 -368 OUT FLAG -128 -368 IN FLAG 320 144 Q2B SYMBOL voltage -160 80 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(48 48 0 300u) SYMBOL res 784 -288 R0 SYMATTR InstName R5 SYMATTR Value 39 SYMBOL npn 304 96 M0 SYMATTR InstName Q2 SYMATTR Value 2N5550 SYMBOL schottky 336 -256 R180 WINDOW 0 -41 38 Left 2 WINDOW 3 -118 -3 Left 2 SYMATTR InstName D2 SYMATTR Value MBRS1100 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 544 176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 47 SYMBOL res 144 80 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 1000k SYMBOL res 256 16 R180 WINDOW 0 -47 74 Left 2 WINDOW 3 -47 41 Left 2 SYMATTR InstName R2 SYMATTR Value sel SYMBOL res 704 320 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R4 SYMATTR Value 1k SYMBOL zener 704 -208 R180 WINDOW 0 36 -16 Left 2 WINDOW 3 23 -83 Left 2 SYMATTR InstName D1 SYMATTR Value 4V7 SYMATTR Description Diode SYMATTR Type diode SYMBOL ind 464 -384 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName L1 SYMATTR Value 1000µ SYMATTR SpiceLine Rser=.2 SYMBOL pnp 288 -304 M270 WINDOW 0 127 66 VLeft 2 WINDOW 3 92 88 VLeft 2 SYMATTR InstName Q1 SYMATTR Value FZT953 SYMBOL npn 432 144 M0 SYMATTR InstName Q3 SYMATTR Value BC547C SYMBOL Misc\\EuropeanPolcap 112 -336 R0 SYMATTR InstName C1 SYMATTR Value 47µ/100V SYMBOL Misc\\EuropeanPolcap 464 -336 R0 SYMATTR InstName C2 SYMATTR Value 4µ7 SYMBOL Misc\\EuropeanPolcap 528 -336 R0 SYMATTR InstName C3 SYMATTR Value 4µ7 SYMBOL res 480 48 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 22K SYMBOL nmos 192 -192 R0 SYMATTR InstName M1 SYMATTR Value BSS 139 TEXT -80 232 Left 2 !.tran .5m TEXT -96 416 Left 2 !.MODEL FZT953 PNP IS=1.6649E-12 NF=1.0139 BF=220 IKF=3.4 VAF=55\n+ISE=6.2E-13 NE=1.62 NR=1.0107 BR=40 IKR=0.95 VAR=43 ISC=3E-12\n+NC=1.4 RB=0.032 RE=0.0295 RC=0.034 CJC=265E-12 MJC=0.5286 VJC=0.76\n+CJE=1.1E-9 TF=0.795E-9 TR=37.5E-9