Version 4
SHEET 1 1028 680
WIRE 0 64 -160 64
WIRE 96 64 0 64
WIRE 176 64 96 64
WIRE 464 64 176 64
WIRE 752 64 464 64
WIRE 0 96 0 64
WIRE 256 112 112 112
WIRE 176 128 176 64
WIRE 112 144 112 112
WIRE 144 144 112 144
WIRE 256 160 256 112
WIRE 256 160 208 160
WIRE 352 160 336 160
WIRE 544 160 432 160
WIRE 784 160 688 160
WIRE -160 176 -160 64
WIRE 144 176 0 176
WIRE 288 192 176 192
WIRE 464 192 464 64
WIRE 336 208 336 160
WIRE 432 208 336 208
WIRE 752 208 752 64
WIRE 96 224 96 64
WIRE 176 224 96 224
WIRE 544 224 544 160
WIRE 544 224 496 224
WIRE 576 224 544 224
WIRE 688 224 688 160
WIRE 688 224 656 224
WIRE 720 224 688 224
WIRE 864 224 864 160
WIRE 864 224 848 224
WIRE 944 224 864 224
WIRE 240 240 112 240
WIRE 288 240 288 192
WIRE 400 240 288 240
WIRE 432 240 416 240
WIRE 848 240 848 224
WIRE 848 240 784 240
WIRE 176 256 176 224
WIRE 720 256 688 256
WIRE 48 272 -80 272
WIRE 112 272 112 240
WIRE 144 272 112 272
WIRE 240 288 240 240
WIRE 240 288 208 288
WIRE 256 288 240 288
WIRE 336 288 336 208
WIRE 400 288 400 240
WIRE 464 288 464 256
WIRE 464 288 400 288
WIRE 752 288 752 272
WIRE 752 288 464 288
WIRE -80 304 -80 272
WIRE 48 304 48 272
WIRE 144 304 48 304
WIRE 176 336 176 320
WIRE 400 336 400 288
WIRE 400 336 176 336
WIRE -160 384 -160 256
WIRE -80 384 -160 384
WIRE 0 384 0 256
WIRE 0 384 -80 384
WIRE 352 384 0 384
WIRE 416 384 416 240
WIRE 416 384 352 384
WIRE 464 384 464 368
WIRE 464 384 416 384
WIRE 688 384 688 256
WIRE 688 384 464 384
WIRE 944 384 688 384
WIRE 352 416 352 384
FLAG 352 416 0
SYMBOL voltage -160 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5V
SYMBOL res -16 80 R0
SYMATTR InstName R1
SYMATTR Value 3k5
SYMBOL res -16 160 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL voltage -80 288 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 16 117 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 2 0.1 0.1 0 0.1)
SYMBOL res 352 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 352 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 15k
SYMBOL res 448 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 928 288 R0
SYMATTR InstName R6
SYMATTR Value 1k5
SYMBOL res 928 208 R0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL res 880 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R
SYMATTR Value 10k
SYMBOL voltage 464 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 37 32 Left 2
SYMATTR InstName V3
SYMATTR Value -15
SYMBOL res 672 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 10k
SYMBOL Opamps\\LT1367 176 96 R0
WINDOW 3 -31 110 Left 2
SYMATTR InstName U4
SYMBOL Opamps\\LT1367 176 224 R0
SYMATTR InstName U1
SYMBOL Opamps\\LT1367 464 160 R0
SYMATTR InstName U2
SYMBOL Opamps\\LT1367 752 176 R0
SYMATTR InstName U3
TEXT -192 408 Left 2 !.tran 500m
TEXT 544 8 Left 2 !.opt abstol=100p
TEXT 544 40 Left 2 !.opt reltol=0.01