Version 4 SHEET 1 880 680 WIRE 128 -240 -320 -240 WIRE 400 -240 128 -240 WIRE 128 -208 128 -240 WIRE 128 -96 128 -128 WIRE 128 -96 -144 -96 WIRE 128 -48 128 -96 WIRE -320 -16 -320 -240 WIRE 400 32 400 -240 WIRE -144 48 -144 -96 WIRE -320 96 -320 64 WIRE -32 96 -32 64 WIRE -32 96 -80 96 WIRE 128 96 128 32 WIRE 128 96 -32 96 WIRE -32 128 -32 96 WIRE 128 128 128 96 WIRE -144 176 -144 144 WIRE 208 176 192 176 WIRE 288 176 272 176 WIRE 400 176 400 112 WIRE 400 176 288 176 WIRE 400 208 400 176 WIRE -32 224 -32 192 WIRE 288 256 288 176 WIRE 128 304 128 224 WIRE 224 304 128 304 WIRE 400 320 400 288 WIRE 288 384 288 352 FLAG 288 384 0 FLAG -32 224 0 FLAG -320 96 0 FLAG 400 320 0 FLAG -32 64 Out FLAG -144 176 0 SYMBOL pnp 192 224 R180 SYMATTR InstName Q1 SYMATTR Value 2N3906 SYMBOL npn 224 256 R0 SYMATTR InstName Q2 SYMATTR Value 2N3904 SYMBOL res 112 -224 R0 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL cap -48 128 R0 SYMATTR InstName C1 SYMATTR Value 100n SYMBOL voltage -320 -32 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL res 384 16 R0 SYMATTR InstName R2 SYMATTR Value 1k SYMBOL res 384 192 R0 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL res 112 -64 R0 SYMATTR InstName R4 SYMATTR Value 56k SYMBOL pnp -80 144 R180 SYMATTR InstName Q3 SYMATTR Value 2N3906 SYMBOL diode 208 192 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value 1N4148 TEXT -256 408 Left 2 !.tran 0 250m 0 50u uic