Version 4
SHEET 1 880 680
WIRE -800 -384 -800 -416
WIRE -688 -384 -688 -416
WIRE -800 -272 -800 -304
WIRE -688 -272 -688 -304
WIRE -336 -256 -384 -256
WIRE -224 -256 -272 -256
WIRE -656 -128 -656 -160
WIRE -688 -112 -800 -112
WIRE -800 -96 -800 -112
WIRE -544 -96 -624 -96
WIRE -496 -96 -544 -96
WIRE -384 -96 -384 -256
WIRE -384 -96 -416 -96
WIRE -688 -80 -720 -80
WIRE -320 -64 -320 -112
WIRE -656 -48 -656 -64
WIRE -384 -48 -384 -96
WIRE -352 -48 -384 -48
WIRE -224 -32 -224 -256
WIRE -224 -32 -288 -32
WIRE -128 -32 -224 -32
WIRE -352 -16 -384 -16
WIRE -384 0 -384 -16
WIRE -320 16 -320 0
WIRE -848 32 -896 32
WIRE -720 32 -720 -80
WIRE -720 32 -768 32
WIRE -688 32 -720 32
WIRE -544 32 -544 -96
WIRE -544 32 -608 32
WIRE -128 64 -128 48
WIRE -896 112 -896 32
WIRE -224 112 -224 -32
WIRE -224 112 -896 112
FLAG -800 -96 0
FLAG -800 -272 0
FLAG -688 -272 0
FLAG -384 0 0
FLAG -800 -416 V-
IOPIN -800 -416 Out
FLAG -688 -416 V+
IOPIN -688 -416 Out
FLAG -656 -160 V+
IOPIN -656 -160 In
FLAG -320 -112 V+
IOPIN -320 -112 In
FLAG -656 -48 V-
IOPIN -656 -48 In
FLAG -320 16 V-
IOPIN -320 16 In
FLAG -128 64 0
SYMBOL voltage -688 -400 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL cap -272 -272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL res -512 -80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 2.1k
SYMATTR SpiceLine tol=1
SYMBOL res -864 48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 1k
SYMATTR SpiceLine tol=1
SYMBOL res -704 48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 3.2k
SYMATTR SpiceLine tol=1
SYMBOL voltage -800 -400 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value -12V
SYMBOL Opamps\\TL074 -656 -160 R0
SYMATTR InstName U1
SYMBOL Opamps\\TL074 -320 -96 R0
SYMATTR InstName U2
SYMBOL res -144 -48 R0
SYMATTR InstName R4
SYMATTR Value 10k
TEXT -472 -368 Left 2 !.tran 0 1m 0 startup
TEXT -888 -224 Left 2 ;.inc TL074.LIB