Version 4 SHEET 1 880 680 WIRE 176 32 -400 32 WIRE -400 64 -400 32 WIRE 96 96 16 96 WIRE 256 96 96 96 WIRE 176 128 176 32 WIRE 96 144 96 96 WIRE 144 144 96 144 WIRE -400 160 -400 144 WIRE -400 160 -464 160 WIRE 256 160 256 96 WIRE 256 160 208 160 WIRE -464 176 -464 160 WIRE -64 176 -160 176 WIRE 16 176 16 160 WIRE 144 176 96 176 WIRE -400 208 -400 160 WIRE -400 320 -400 288 WIRE 176 320 176 192 WIRE 176 320 -400 320 FLAG -464 176 0 FLAG 96 240 0 FLAG -160 256 0 SYMBOL Opamps\\OP07 176 96 R0 SYMATTR InstName U1 SYMBOL voltage -400 48 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL voltage -400 192 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 5 SYMBOL res 32 160 R90 WINDOW 0 88 53 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 750k SYMBOL cap 112 240 R180 WINDOW 0 -32 48 Left 2 WINDOW 3 -52 27 Left 2 SYMATTR InstName C1 SYMATTR Value 1.5ľ SYMBOL cap 32 160 R180 WINDOW 0 -39 14 Left 2 WINDOW 3 -47 43 Left 2 SYMATTR InstName C2 SYMATTR Value 3ľ SYMBOL res 112 160 R90 WINDOW 0 87 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 750k SYMBOL voltage -160 160 R0 WINDOW 123 24 124 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value "" SYMATTR Value2 AC 1 TEXT -488 328 Left 2 !.ac dec 100 0.01 10