Version 4 SHEET 1 880 680 WIRE 64 -160 -144 -160 WIRE 112 -160 64 -160 WIRE 240 -160 192 -160 WIRE 688 -160 240 -160 WIRE 64 -96 64 -160 WIRE -144 -48 -144 -160 WIRE 240 0 240 -160 WIRE 64 48 64 -16 WIRE 176 48 64 48 WIRE -144 128 -144 16 WIRE 240 128 240 96 WIRE 240 128 -144 128 WIRE 352 128 240 128 WIRE 480 128 416 128 WIRE 64 144 64 112 WIRE 240 160 240 128 WIRE 688 160 688 -160 WIRE 480 192 480 128 WIRE 176 208 64 208 WIRE -144 240 -144 128 WIRE 64 352 64 208 WIRE -416 400 -464 400 WIRE -272 400 -352 400 WIRE -144 400 -144 320 WIRE -144 400 -192 400 WIRE 0 400 -144 400 WIRE -464 448 -464 400 WIRE -464 592 -464 528 WIRE 64 592 64 448 WIRE 64 592 -464 592 WIRE 240 592 240 256 WIRE 240 592 64 592 WIRE 480 592 480 272 WIRE 480 592 240 592 WIRE 688 592 688 240 WIRE 688 592 480 592 WIRE 240 656 240 592 FLAG 240 656 0 SYMBOL pnp 176 256 M180 SYMATTR InstName Q1 SYMATTR Value BD140 SYMBOL npn 176 0 R0 SYMATTR InstName Q2 SYMATTR Value BD139 SYMBOL cap 416 112 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 1000µ SYMBOL res 464 176 R0 SYMATTR InstName R1 SYMATTR Value 8 SYMBOL voltage 688 144 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage -464 432 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value SINE(0 0.2 400) SYMBOL diode 48 144 R0 WINDOW 3 27 92 Left 2 SYMATTR Value 1N4148 SYMATTR InstName D1 SYMBOL diode 48 48 R0 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL npn 0 352 R0 SYMATTR InstName Q3 SYMATTR Value BC547C SYMBOL cap -352 384 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 1µ SYMBOL Misc\\EuropeanResistor -176 384 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 22K SYMBOL Misc\\EuropeanResistor -160 224 R0 SYMATTR InstName R3 SYMATTR Value 1Meg SYMBOL Misc\\EuropeanResistor 48 -112 R0 SYMATTR InstName R4 SYMATTR Value 1K SYMBOL Misc\\EuropeanResistor 208 -176 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 1K2 SYMBOL cap -160 -48 R0 SYMATTR InstName C3 SYMATTR Value 47µ TEXT -48 616 Left 2 !.tran 0 60m 50m