Version 4
SHEET 1 1140 728
WIRE 208 -192 80 -192
WIRE 416 -192 288 -192
WIRE 80 -112 80 -192
WIRE 128 -112 80 -112
WIRE 272 -112 192 -112
WIRE -64 64 -256 64
WIRE -48 64 -64 64
WIRE 80 64 80 -112
WIRE 80 64 32 64
WIRE 128 64 80 64
WIRE 416 64 416 -192
WIRE 480 64 480 48
WIRE 480 64 416 64
WIRE -64 80 -64 64
WIRE 272 80 272 -112
WIRE 272 80 192 80
WIRE 352 80 272 80
WIRE 416 80 416 64
WIRE 480 208 480 64
WIRE 560 208 480 208
WIRE 656 208 640 208
WIRE 688 208 656 208
WIRE 800 208 768 208
WIRE 912 208 800 208
WIRE 1024 208 912 208
WIRE -256 224 -256 64
WIRE -64 224 -256 224
WIRE 800 272 656 272
WIRE 912 272 800 272
WIRE 928 272 912 272
WIRE -256 288 -256 224
WIRE 800 288 800 272
WIRE 240 336 64 336
WIRE 464 336 320 336
WIRE 480 336 480 208
WIRE 480 336 464 336
WIRE 64 416 64 336
WIRE 128 416 64 416
WIRE 288 416 192 416
WIRE 64 560 64 416
WIRE 128 560 64 560
WIRE 288 576 288 416
WIRE 288 576 192 576
WIRE 336 576 288 576
WIRE 464 576 464 336
WIRE 464 576 400 576
WIRE -64 592 -64 224
WIRE -32 592 -64 592
WIRE 128 592 48 592
FLAG 160 -32 0
FLAG 160 192 0
FLAG 128 96 0
FLAG 160 464 0
FLAG 160 688 0
FLAG -256 368 0
FLAG 800 288 0
SYMBOL res 64 576 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 48 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 304 -208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 336 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL diode 128 -96 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 352 96 R270
WINDOW 0 26 37 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL diode 128 432 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL diode 336 592 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 -16 33 VBottom 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL voltage -256 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(-2.6 +2.6 0 0 0 0.0002 0.0004)
SYMBOL voltage 160 592 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value -3
SYMBOL voltage 160 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value -3
SYMBOL voltage 160 64 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 3
SYMBOL voltage 160 560 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 V5
SYMATTR Value 3
SYMBOL Opamps\\LT1001A 160 16 R0
SYMATTR InstName U3
SYMBOL Opamps\\LT1001A 160 512 R0
SYMATTR InstName U4
SYMBOL res 656 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 784 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL cap 640 208 R0
SYMATTR InstName C1
SYMATTR Value 0.5µ
SYMBOL cap 784 208 R0
SYMATTR InstName C2
SYMATTR Value 0.5µ
SYMBOL schottky 928 272 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -100 23 Left 2
SYMATTR InstName D5
SYMATTR Value 1N5818
SYMATTR Description Diode
SYMATTR Type diode
TEXT -288 712 Left 2 !.tran 1