Version 4 SHEET 1 880 680 WIRE 240 -32 96 -32 WIRE 432 -32 240 -32 WIRE 96 -16 96 -32 WIRE 432 -16 432 -32 WIRE 240 16 240 -32 WIRE 96 64 0 64 WIRE 176 64 96 64 WIRE 0 80 0 64 WIRE -64 192 -176 192 WIRE 0 192 0 144 WIRE 352 192 240 192 WIRE -176 224 -176 192 WIRE 0 240 0 192 WIRE 0 320 0 304 WIRE 96 320 0 320 WIRE 176 320 96 320 WIRE 96 416 96 400 WIRE 240 416 240 368 WIRE 240 416 96 416 WIRE 432 416 432 400 WIRE 432 416 240 416 FLAG 432 64 0 FLAG 432 320 0 FLAG -176 304 0 FLAG 352 272 0 SYMBOL npn 176 16 R0 SYMATTR InstName Q1 SYMATTR Value BD131 SYMBOL pnp 176 368 M180 SYMATTR InstName Q2 SYMATTR Value BD132 SYMBOL res 224 96 R0 SYMATTR InstName R1 SYMATTR Value 0.22 SYMBOL res 256 288 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R2 SYMATTR Value 0.22 SYMBOL res 80 -32 R0 SYMATTR InstName R3 SYMATTR Value 4.7k SYMBOL res 80 304 R0 SYMATTR InstName R4 SYMATTR Value 4.7k SYMBOL diode -16 80 R0 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL diode -16 240 R0 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL voltage -176 208 R0 WINDOW 3 -92 -46 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value SINE(0 1 1000) SYMBOL voltage 432 -32 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 5 SYMBOL voltage 432 304 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 5 SYMBOL res 336 176 R0 SYMATTR InstName R5 SYMATTR Value 10 SYMBOL cap 0 176 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 10µ TEXT -128 384 Left 2 !.tran 10m