Version 4
SHEET 1 980 744
WIRE 496 -80 192 -80
WIRE 880 -80 496 -80
WIRE 880 -16 880 -80
WIRE 192 32 192 -80
WIRE 192 32 96 32
WIRE 288 32 192 32
WIRE 96 96 96 32
WIRE 288 96 288 32
WIRE 192 144 160 144
WIRE 224 144 192 144
WIRE 496 240 496 -80
WIRE 64 256 -16 256
WIRE 192 256 192 144
WIRE 288 256 288 192
WIRE 288 256 192 256
WIRE -16 288 -16 256
WIRE 96 288 96 192
WIRE 432 288 96 288
WIRE 880 288 880 64
WIRE 960 288 880 288
WIRE 64 320 64 256
WIRE 400 320 64 320
WIRE -240 336 -288 336
WIRE 960 336 960 288
WIRE 400 352 400 320
WIRE 496 352 496 336
WIRE 496 352 400 352
WIRE 592 352 496 352
WIRE 96 368 96 288
WIRE 288 368 288 256
WIRE 496 384 496 352
WIRE -240 416 -240 336
WIRE -240 416 -336 416
WIRE -208 416 -240 416
WIRE -16 416 -16 368
WIRE -16 416 -128 416
WIRE 32 416 -16 416
WIRE 432 416 352 416
WIRE 880 464 880 288
WIRE 432 480 432 416
WIRE 496 480 496 464
WIRE -336 496 -336 416
WIRE 96 512 96 464
WIRE 192 512 96 512
WIRE 288 512 288 464
WIRE 288 512 192 512
WIRE 192 576 192 512
WIRE -336 624 -336 576
WIRE 192 720 192 656
WIRE 880 720 880 544
WIRE 880 720 192 720
WIRE 0 0 0 0
FLAG 960 336 0
FLAG 432 480 0
FLAG -336 624 0
FLAG 496 480 0
FLAG 592 352 Out
IOPIN 592 352 Out
FLAG -288 336 In
IOPIN -288 336 In
SYMBOL pnp 160 192 R180
SYMATTR InstName Q1
SYMATTR Value 2N3906
SYMBOL pnp 224 192 M180
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL npn 32 368 R0
SYMATTR InstName Q3
SYMBOL npn 352 368 M0
SYMATTR InstName Q4
SYMBOL res 176 560 R0
SYMATTR InstName R1
SYMATTR Value 2.2k
SYMBOL voltage 880 -32 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 880 448 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage -336 480 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value SINE(0 1 100)
SYMBOL pnp 432 336 M180
SYMATTR InstName Q5
SYMATTR Value 2N3906
SYMBOL res 480 368 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res -112 400 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 0 384 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R6
SYMATTR Value 100k
TEXT -370 726 Left 2 !.tran 0.2