Version 4 SHEET 1 1032 680 WIRE -272 48 -272 16 WIRE -176 48 -176 16 WIRE 144 80 96 80 WIRE 272 80 224 80 WIRE 672 112 608 112 WIRE 784 112 736 112 WIRE -272 176 -272 128 WIRE -224 176 -272 176 WIRE -176 176 -176 128 WIRE -176 176 -224 176 WIRE -16 176 -48 176 WIRE 96 176 96 80 WIRE 96 176 64 176 WIRE 128 176 96 176 WIRE 272 192 272 80 WIRE 272 192 192 192 WIRE 304 192 272 192 WIRE -224 208 -224 176 WIRE -48 208 -48 176 WIRE 128 208 96 208 WIRE 496 208 464 208 WIRE 608 208 608 112 WIRE 608 208 576 208 WIRE 640 208 608 208 WIRE 784 224 784 112 WIRE 784 224 704 224 WIRE 816 224 784 224 WIRE 464 240 464 208 WIRE 640 240 608 240 WIRE -16 304 -128 304 WIRE 96 304 96 208 WIRE 96 304 64 304 WIRE 144 304 96 304 WIRE 272 304 272 192 WIRE 272 304 224 304 WIRE -128 336 -128 304 WIRE 608 336 608 240 WIRE 608 336 576 336 WIRE 96 352 96 304 WIRE 608 384 608 336 WIRE -128 448 -128 416 WIRE 96 448 96 416 WIRE 608 480 608 448 FLAG -48 208 0 FLAG -128 448 0 FLAG 96 448 0 FLAG 304 192 Vout1 FLAG -224 208 0 FLAG -176 16 V- FLAG -272 16 V+ FLAG 160 160 V+ FLAG 160 224 V- FLAG 464 240 0 FLAG 608 480 0 FLAG 816 224 Vout2 FLAG 672 192 V+ FLAG 672 256 V- FLAG -128 304 vin FLAG 496 336 vin SYMBOL res -32 192 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL res 128 96 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL res 128 320 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R4 SYMATTR Value 100k SYMBOL res -32 320 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R3 SYMATTR Value 100k SYMBOL voltage -128 320 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value PULSE(0 2 1u 1u) SYMBOL cap 80 352 R0 SYMATTR InstName C1 SYMATTR Value 4.7u SYMBOL Misc\\battery -272 32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value 15 SYMBOL Misc\\battery -176 32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value -15 SYMBOL Opamps\\UniversalOpamp2 160 192 R0 SYMATTR InstName U1 SYMBOL res 480 224 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R5 SYMATTR Value 50k SYMBOL res 480 352 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R8 SYMATTR Value 50k SYMBOL cap 592 384 R0 SYMATTR InstName C2 SYMATTR Value 4.7u SYMBOL Opamps\\UniversalOpamp2 672 224 R0 SYMATTR InstName U2 SYMBOL cap 736 96 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C3 SYMATTR Value 4.7u TEXT -608 16 Left 0 !.tran 0 1 0 100u TEXT 16 -16 Left 0 !.include opamp.sub TEXT 24 24 Left 0 ;Vout = 2/RC * Integral of Vin TEXT -608 48 Left 0 !.options plotwinsize=0 TEXT -600 -72 Left 0 ;Condition for stability: R4/R3 > R2/R1