Version 4
SHEET 1 900 680
WIRE -48 -80 -192 -80
WIRE 240 -80 -48 -80
WIRE 272 -80 240 -80
WIRE 640 -32 192 -32
WIRE -48 0 -48 -80
WIRE -192 16 -192 -80
WIRE 640 64 640 -32
WIRE 192 112 192 -32
WIRE -288 128 -320 128
WIRE -192 128 -192 80
WIRE -192 128 -208 128
WIRE -144 128 -192 128
WIRE -48 128 -48 80
WIRE -48 128 -80 128
WIRE 160 128 -48 128
WIRE 272 144 272 -80
WIRE 272 144 224 144
WIRE 160 160 128 160
WIRE -192 176 -192 128
WIRE 640 192 640 144
WIRE 640 192 560 192
WIRE 560 224 560 192
WIRE 640 224 640 192
WIRE 128 240 128 160
WIRE -320 256 -320 128
WIRE -192 288 -192 256
WIRE -320 368 -320 336
WIRE 192 448 192 176
WIRE 640 448 640 304
WIRE 640 448 192 448
FLAG -320 368 0
FLAG 128 240 0
FLAG 240 -80 Out
FLAG -192 288 0
FLAG 560 224 0
SYMBOL res -192 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -176 272 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R2
SYMATTR Value 230
SYMBOL res -64 -16 R0
SYMATTR InstName R3
SYMATTR Value 24k
SYMBOL cap -176 80 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C1
SYMATTR Value 680n
SYMBOL cap -144 144 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 680n
SYMBOL voltage -320 240 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value2 AC 0.7 0.1
SYMATTR InstName V1
SYMATTR Value ""
SYMBOL voltage 640 48 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL Opamps\\LT1001 192 80 R0
SYMATTR InstName U1
SYMBOL voltage 640 208 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 5
TEXT -352 536 Left 2 !;tran 0.1
TEXT -360 560 Left 2 !;tran 0.1
TEXT -360 584 Left 2 !;tran 0 0.1 0.01
TEXT -368 600 Left 2 !;tran 0 0.1 0.01
TEXT -80 304 Left 2 !.ac oct 200 50 300