Version 4
SHEET 1 880 864
WIRE -544 -128 -944 -128
WIRE -288 -128 -544 -128
WIRE 32 -128 -288 -128
WIRE 320 -128 32 -128
WIRE -544 -32 -544 -128
WIRE -288 -32 -288 -128
WIRE 32 -32 32 -128
WIRE -448 16 -480 16
WIRE -352 16 -448 16
WIRE -32 16 -144 16
WIRE -944 64 -944 -128
WIRE 320 80 320 -128
WIRE -544 96 -544 64
WIRE -448 96 -448 16
WIRE -448 96 -544 96
WIRE -288 128 -288 64
WIRE -144 128 -144 16
WIRE -144 128 -288 128
WIRE -80 128 -144 128
WIRE 32 128 32 64
WIRE 32 128 -16 128
WIRE 256 128 32 128
WIRE 32 192 32 128
WIRE 320 272 320 176
WIRE 480 272 320 272
WIRE 560 272 480 272
WIRE 32 288 32 256
WIRE -544 304 -544 96
WIRE -288 304 -288 128
WIRE -1200 352 -1280 352
WIRE -1072 352 -1200 352
WIRE -768 352 -992 352
WIRE -608 352 -768 352
WIRE -144 352 -224 352
WIRE -96 352 -144 352
WIRE 320 352 320 272
WIRE 32 400 32 352
WIRE 256 400 32 400
WIRE -544 448 -544 400
WIRE -416 448 -544 448
WIRE -288 448 -288 400
WIRE -288 448 -416 448
WIRE -1200 464 -1200 352
WIRE -768 464 -768 352
WIRE -144 464 -144 352
WIRE 32 464 32 400
WIRE -416 496 -416 448
WIRE -1200 656 -1200 544
WIRE -944 656 -944 144
WIRE -944 656 -1200 656
WIRE -416 656 -416 576
WIRE -416 656 -944 656
WIRE -144 656 -144 544
WIRE -144 656 -416 656
WIRE 32 656 32 544
WIRE 32 656 -144 656
WIRE 320 656 320 448
WIRE 320 656 32 656
WIRE -944 688 -944 656
WIRE -768 768 -768 544
WIRE 480 768 480 272
WIRE 480 768 -768 768
FLAG -944 688 0
FLAG 560 272 VOUT
IOPIN 560 272 Out
FLAG -96 352 IN+
IOPIN -96 352 In
FLAG -1280 352 IN-
IOPIN -1280 352 In
SYMBOL npn -224 304 M0
SYMATTR InstName Q2
SYMATTR Value 2SC4081
SYMBOL pnp -480 64 R180
SYMATTR InstName Q4
SYMATTR Value 2SA1774
SYMBOL pnp -352 64 M180
SYMATTR InstName Q5
SYMATTR Value 2SA1774
SYMBOL pnp -32 64 M180
SYMATTR InstName Q6
SYMATTR Value 2SA1774
SYMBOL npn -608 304 R0
SYMATTR InstName Q1
SYMATTR Value 2SC4081
SYMBOL current -416 496 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I1
SYMATTR Value 20µ
SYMBOL res 16 448 R0
SYMATTR InstName R1
SYMATTR Value 20k
SYMBOL npn 256 80 R0
SYMATTR InstName Q3
SYMATTR Value 2SC4081
SYMBOL pnp 256 448 M180
SYMATTR InstName Q8
SYMATTR Value 2SA1774
SYMBOL voltage -944 48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage -1200 448 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value SINE(2.5 0.2 1k)
SYMBOL voltage -144 448 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 2.5
SYMBOL res -976 336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res -784 448 R0
SYMATTR InstName R3
SYMATTR Value 50k
SYMBOL cap -16 112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 40p
SYMBOL diode 16 192 R0
SYMATTR InstName D1
SYMBOL diode 16 288 R0
SYMATTR InstName D2
TEXT -1256 848 Left 2 !.tran 5m