Version 4
SHEET 1 936 680
WIRE 432 -96 352 -96
WIRE 352 -80 352 -96
WIRE 432 -64 432 -96
WIRE 16 -16 -64 -16
WIRE 272 -16 80 -16
WIRE 112 48 80 48
WIRE 272 48 272 -16
WIRE 272 48 192 48
WIRE 400 80 400 48
WIRE 352 96 352 0
WIRE 368 96 352 96
WIRE -176 112 -256 112
WIRE -64 112 -64 -16
WIRE -64 112 -112 112
WIRE -16 112 -64 112
WIRE 16 112 -16 112
WIRE 80 112 80 48
WIRE 176 112 80 112
WIRE 608 112 432 112
WIRE 272 128 272 48
WIRE 272 128 240 128
WIRE 368 128 272 128
WIRE 176 144 144 144
WIRE -256 160 -256 112
WIRE -16 240 -16 192
WIRE 144 240 144 144
WIRE 400 256 400 144
WIRE -256 272 -256 240
WIRE 96 416 96 384
WIRE 256 416 256 384
WIRE 256 496 96 496
WIRE 96 528 96 496
FLAG -16 240 0
FLAG 144 240 0
FLAG -256 272 0
FLAG 96 528 0
FLAG 96 384 Ub+
FLAG 256 384 Ub-
FLAG 208 160 Ub-
FLAG 208 96 Ub+
FLAG 432 -64 0
FLAG 400 256 0
FLAG 400 48 Ub+
SYMBOL res 208 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 27k
SYMBOL res 0 208 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R2
SYMATTR Value 6200
SYMBOL cap 80 -32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 80 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL cap -112 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL voltage -256 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 5 60)
SYMBOL voltage 96 400 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL voltage 256 512 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 12
SYMBOL Opamps\\LT1001 208 64 R0
SYMATTR InstName U1
SYMBOL Opamps\\LT1001 400 48 R0
SYMATTR InstName U2
SYMBOL voltage 352 16 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 0.5
TEXT -248 -32 Left 2 !.tran 100m