Version 4
SHEET 1 880 680
WIRE 272 -32 64 -32
WIRE 144 32 128 32
WIRE 256 32 224 32
WIRE 336 32 320 32
WIRE 432 32 336 32
WIRE 608 32 496 32
WIRE 64 48 64 -32
WIRE 272 96 272 -32
WIRE 272 96 256 96
WIRE 608 96 608 32
WIRE 256 128 256 96
WIRE 224 144 208 144
WIRE 64 160 64 128
WIRE 336 160 336 32
WIRE 336 160 288 160
WIRE 432 160 336 160
WIRE 496 160 432 160
WIRE 128 176 128 32
WIRE 176 176 128 176
WIRE 224 176 176 176
WIRE 128 192 128 176
WIRE 176 192 176 176
WIRE 336 192 336 160
WIRE 432 208 432 160
WIRE 496 208 496 160
WIRE 608 208 608 176
WIRE 432 272 336 272
WIRE 496 272 432 272
WIRE 64 288 64 240
WIRE 336 288 336 272
WIRE 128 304 128 256
WIRE 176 304 176 272
WIRE 208 368 208 144
WIRE 336 368 208 368
WIRE 336 384 336 368
WIRE 64 400 64 368
WIRE 256 400 256 192
WIRE 256 400 64 400
WIRE 336 496 336 464
FLAG 64 160 0
FLAG 64 240 0
FLAG 128 304 0
FLAG 176 304 0
FLAG 336 496 0
FLAG 608 208 0
SYMBOL voltage 64 32 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL voltage 64 272 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 10
SYMBOL Opamps\\LT1007 256 96 R0
SYMATTR InstName U1
SYMBOL res 240 16 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 160k
SYMBOL res 192 288 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R2
SYMATTR Value 160k
SYMBOL res 352 288 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R3
SYMATTR Value 11k
SYMBOL res 352 384 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 352 480 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 624 192 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL cap 320 16 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL cap 144 256 R180
WINDOW 0 24 64 Left 0
WINDOW 3 24 8 Left 0
SYMATTR InstName C2
SYMATTR Value 1n
SYMBOL diode 416 208 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 512 272 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL cap 496 16 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C3
SYMATTR Value 100n