Version 4
SHEET 1 880 884
WIRE 176 -576 80 -576
WIRE 80 -528 80 -576
WIRE 176 -512 176 -576
WIRE 80 -384 80 -448
WIRE 80 -384 -80 -384
WIRE 208 -384 80 -384
WIRE 464 -384 208 -384
WIRE 688 -384 464 -384
WIRE -80 -352 -80 -384
WIRE 208 -352 208 -384
WIRE 464 -352 464 -384
WIRE 208 -240 208 -272
WIRE 352 -240 208 -240
WIRE 208 -224 208 -240
WIRE 464 -224 464 -272
WIRE -80 -176 -80 -272
WIRE 144 -176 -80 -176
WIRE 352 -176 352 -240
WIRE 400 -176 352 -176
WIRE -80 -144 -80 -176
WIRE 688 -144 688 -384
WIRE 464 -96 464 -128
WIRE 624 -96 464 -96
WIRE -80 -32 -80 -64
WIRE 688 -16 688 -48
WIRE 208 0 208 -128
WIRE -144 16 -192 16
WIRE 464 16 464 -96
WIRE 32 64 -80 64
WIRE -320 112 -432 112
WIRE -192 112 -192 16
WIRE -192 112 -240 112
WIRE 80 112 80 -384
WIRE 80 112 -80 112
WIRE 208 112 208 80
WIRE 320 112 208 112
WIRE 512 112 320 112
WIRE 640 112 640 96
WIRE 640 112 592 112
WIRE 688 112 688 64
WIRE 688 112 640 112
WIRE -432 128 -432 112
WIRE 688 144 688 112
WIRE -80 160 -80 112
WIRE 32 160 32 64
WIRE 80 160 32 160
WIRE 208 160 208 112
WIRE -192 208 -192 112
WIRE -144 208 -192 208
WIRE 688 256 688 224
WIRE -432 272 -432 208
WIRE -80 288 -80 256
WIRE 464 304 464 80
WIRE 624 304 464 304
WIRE 464 336 464 304
WIRE 208 352 208 240
WIRE 400 384 352 384
WIRE -80 400 -80 368
WIRE 144 400 -80 400
WIRE 208 480 208 448
WIRE 352 480 352 384
WIRE 352 480 208 480
WIRE -80 512 -80 400
WIRE 208 512 208 480
WIRE 464 512 464 432
WIRE -80 640 -80 592
WIRE 80 640 80 160
WIRE 80 640 -80 640
WIRE 208 640 208 592
WIRE 208 640 80 640
WIRE 464 640 464 592
WIRE 464 640 208 640
WIRE 688 640 688 352
WIRE 688 640 464 640
WIRE 320 688 320 112
WIRE 80 704 80 640
WIRE 80 832 80 784
WIRE 320 832 320 768
WIRE 320 832 80 832
WIRE 80 864 80 832
FLAG 176 -512 0
FLAG 80 864 0
FLAG -432 272 0
FLAG 640 96 OUT
IOPIN 640 96 Out
SYMBOL pnp -144 64 M180
SYMATTR InstName Q1
SYMATTR Value BC856B
SYMBOL pnp 144 448 M180
SYMATTR InstName Q3
SYMATTR Value BC856B
SYMBOL npn -144 160 R0
SYMATTR InstName Q5
SYMATTR Value BC846B
SYMBOL res -96 -368 R0
SYMATTR InstName R1
SYMATTR Value 2k
SYMBOL res -96 496 R0
SYMATTR InstName R2
SYMATTR Value 2k
SYMBOL npn 144 -224 R0
SYMATTR InstName Q6
SYMATTR Value BC846B
SYMBOL res 192 -16 R0
SYMATTR InstName R3
SYMATTR Value 22
SYMBOL res 192 144 R0
SYMATTR InstName R4
SYMATTR Value 22
SYMBOL res -96 -160 R0
SYMATTR InstName R5
SYMATTR Value 22
SYMBOL res -96 272 R0
SYMATTR InstName R6
SYMATTR Value 22
SYMBOL voltage 80 -432 R180
WINDOW 0 24 104 Left 0
WINDOW 3 24 16 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 24 76 Left 0
SYMATTR InstName V1
SYMATTR Value 15
SYMATTR SpiceLine Rser=0
SYMBOL voltage 80 800 R180
WINDOW 0 24 104 Left 0
WINDOW 3 24 16 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 24 -12 Left 0
SYMATTR InstName V2
SYMATTR Value 15
SYMATTR SpiceLine Rser=0
SYMBOL res -224 96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL voltage -432 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value SINE(0 500m 1k)
SYMBOL pnp 400 -128 M180
SYMATTR InstName Q2
SYMATTR Value BC856B
SYMBOL npn 400 336 R0
SYMATTR InstName Q4
SYMATTR Value BC846B
SYMBOL res 448 -368 R0
SYMATTR InstName R8
SYMATTR Value 330
SYMBOL res 448 496 R0
SYMATTR InstName R9
SYMATTR Value 330
SYMBOL res 192 -368 R0
SYMATTR InstName R10
SYMATTR Value 330
SYMBOL res 192 496 R0
SYMATTR InstName R11
SYMATTR Value 330
SYMBOL npn 624 -144 R0
SYMATTR InstName Q7
SYMATTR Value BC337-40
SYMBOL pnp 624 352 M180
SYMATTR InstName Q8
SYMATTR Value BC327-40
SYMBOL res 672 -32 R0
SYMATTR InstName R12
SYMATTR Value 22
SYMBOL res 672 128 R0
SYMATTR InstName R13
SYMATTR Value 22
SYMBOL res 608 96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R14
SYMATTR Value 3.3k
SYMBOL res 336 784 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R15
SYMATTR Value 330
SYMBOL zener 480 80 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D1
SYMATTR Value 1N750
TEXT -466 792 Left 0 !.tran 0 30m 10m 0.001m