Version 4
SHEET 1 2476 900
WIRE 656 -224 656 -256
WIRE 1376 -208 1232 -208
WIRE 1232 -192 1232 -208
WIRE 1024 -144 992 -144
WIRE 1136 -144 1104 -144
WIRE 784 -128 752 -128
WIRE 880 -128 864 -128
WIRE 1376 -112 1376 -208
WIRE 544 -96 496 -96
WIRE 656 -96 656 -144
WIRE 656 -96 608 -96
WIRE 656 -80 656 -96
WIRE 1056 -80 816 -80
WIRE 1232 -80 1232 -112
WIRE 1232 -80 1056 -80
WIRE 496 -64 496 -96
WIRE 1056 -32 1056 -80
WIRE 1232 -32 1232 -80
WIRE 816 -16 816 -80
WIRE 992 -16 992 -144
WIRE 1024 -16 992 -16
WIRE 752 0 752 -128
WIRE 784 0 752 0
WIRE 1136 0 1136 -144
WIRE 1136 0 1088 0
WIRE 1184 0 1136 0
WIRE 880 16 880 -128
WIRE 880 16 848 16
WIRE 1024 16 880 16
WIRE 512 32 400 32
WIRE 608 32 576 32
WIRE 656 32 656 0
WIRE 656 32 608 32
WIRE 784 32 656 32
WIRE 400 80 400 32
WIRE 816 80 816 48
WIRE 1056 80 1056 32
WIRE 1056 80 816 80
WIRE 1232 80 1232 48
WIRE 1232 80 1056 80
WIRE 1376 80 1376 -32
WIRE 1376 80 1232 80
WIRE 1056 112 1056 80
WIRE 816 128 816 80
WIRE 992 128 992 -16
WIRE 656 144 656 32
WIRE 752 144 752 0
WIRE 400 224 400 160
WIRE 992 288 992 272
WIRE 656 304 656 224
WIRE 752 304 752 288
FLAG 608 32 in
FLAG 816 128 0
FLAG 752 304 0
FLAG 656 304 0
FLAG 400 224 0
FLAG 992 288 0
FLAG 1056 112 0
FLAG 496 -64 0
FLAG 656 -256 V+
DATAFLAG 880 16 ""
DATAFLAG 1136 0 ""
DATAFLAG 656 32 ""
SYMBOL voltage 400 64 R0
WINDOW 123 -101 107 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 -34 6 Left 2
WINDOW 3 22 109 Left 2
SYMATTR Value2 AC 1 0
SYMATTR InstName V1
SYMATTR Value SINE(0 35m 1k)
SYMBOL cap 576 16 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL res 640 -96 R0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL res 640 128 R0
WINDOW 0 -41 45 Left 2
WINDOW 3 -54 77 Left 2
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL voltage 1376 -128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 44 Left 2
WINDOW 3 31 78 Left 2
SYMATTR Value 6V
SYMATTR InstName V2
SYMBOL res 880 -144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL res 768 240 R180
WINDOW 0 39 70 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL cap 736 224 R0
SYMATTR InstName C6
SYMATTR Value 6µ8
SYMBOL res 1008 224 R180
WINDOW 0 34 67 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R11
SYMATTR Value 2
SYMBOL cap 976 208 R0
SYMATTR InstName C8
SYMATTR Value 4µ7
SYMBOL res 1120 -160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R12
SYMATTR Value 20k
SYMBOL res 640 -240 R0
SYMATTR InstName R13
SYMATTR Value 10k
SYMBOL cap 608 -112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C9
SYMATTR Value 1µ
SYMBOL Opamps\\LT1677 816 -48 R0
SYMATTR InstName U5
SYMBOL Opamps\\LT1677 1056 -64 R0
SYMATTR InstName U6
SYMBOL res 1216 -208 R0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL res 1216 -48 R0
SYMATTR InstName R6
SYMATTR Value 1k
TEXT 296 352 Left 2 !;ac dec 100 20 20000
TEXT 312 312 Left 2 !.tran 0 0.1 0 1