Version 4
SHEET 1 880 680
WIRE 448 -160 384 -160
WIRE 560 -160 512 -160
WIRE -176 -64 -304 -64
WIRE 384 -64 384 -160
WIRE 384 -64 -96 -64
WIRE 432 -64 384 -64
WIRE 560 -64 560 -160
WIRE 560 -64 512 -64
WIRE 464 32 464 16
WIRE -304 48 -304 -64
WIRE -176 48 -304 48
WIRE -48 48 -96 48
WIRE 32 48 -48 48
WIRE 192 48 112 48
WIRE 224 48 192 48
WIRE 272 48 224 48
WIRE 384 48 384 -64
WIRE 384 48 352 48
WIRE 432 48 384 48
WIRE 560 64 560 -64
WIRE 560 64 496 64
WIRE 608 64 560 64
WIRE -304 80 -304 48
WIRE 432 80 384 80
WIRE 224 112 224 48
WIRE 384 112 384 80
WIRE 464 112 464 96
WIRE -304 176 -304 160
WIRE 80 192 80 176
WIRE -48 208 -48 48
WIRE 48 208 -48 208
WIRE 224 224 224 176
WIRE 224 224 112 224
WIRE 48 240 0 240
WIRE 0 272 0 240
WIRE 80 272 80 256
WIRE 224 272 224 224
WIRE 432 272 432 256
WIRE 560 272 560 256
WIRE -48 368 -48 208
WIRE 224 368 224 336
WIRE 224 368 -48 368
WIRE 432 368 432 352
WIRE 560 368 560 352
FLAG 384 112 0
FLAG 0 272 0
FLAG -304 -64 IN
FLAG 608 64 OUT
IOPIN 608 64 Out
FLAG 560 368 0
FLAG -304 176 0
FLAG 432 368 0
FLAG 80 176 V+
FLAG 80 272 V-
FLAG 464 16 V+
FLAG 464 112 V-
FLAG 432 256 V+
FLAG 560 256 V-
FLAG 192 48 1
SYMBOL diode 208 112 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 208 272 R0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL cap 512 -176 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 4.7µ
SYMBOL voltage 560 256 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value -15
SYMBOL voltage -304 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 10 50)
SYMBOL voltage 432 256 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 15
SYMBOL Opamps\\LT1007A 80 160 R0
SYMATTR InstName U1
SYMBOL Opamps\\LT1007A 464 0 R0
SYMATTR InstName U2
SYMBOL Misc\\EuropeanResistor -192 64 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 16 64 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 256 64 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 416 -48 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 20k
SYMBOL Misc\\EuropeanResistor -192 -48 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 20k
TEXT -344 480 Left 2 !.tran 0 0.5 0 50u
TEXT -344 512 Left 2 !.options plotwinsize=0