Version 4
SHEET 1 1284 740
WIRE 608 -256 480 -256
WIRE 864 -256 608 -256
WIRE 1072 -256 864 -256
WIRE 480 -224 480 -256
WIRE 80 -112 -32 -112
WIRE 480 -112 480 -144
WIRE 864 -96 864 -256
WIRE 80 -80 80 -112
WIRE 960 16 896 16
WIRE 1152 16 1040 16
WIRE 608 64 608 -256
WIRE 576 80 544 80
WIRE 1072 80 1072 -256
WIRE 752 96 640 96
WIRE 896 96 896 16
WIRE 896 96 752 96
WIRE 1040 96 896 96
WIRE 80 112 80 0
WIRE 336 112 80 112
WIRE 576 112 336 112
WIRE 1152 112 1152 16
WIRE 1152 112 1104 112
WIRE 1280 112 1152 112
WIRE 752 128 752 96
WIRE 864 128 864 -16
WIRE 1040 128 864 128
WIRE 80 160 80 112
WIRE 336 160 336 112
WIRE 864 176 864 128
WIRE 544 240 544 80
WIRE 752 240 752 208
WIRE 752 240 544 240
WIRE 864 272 864 240
WIRE 752 288 752 240
WIRE -32 304 -32 -112
WIRE 80 304 80 240
WIRE 80 304 -32 304
WIRE 336 304 336 224
WIRE 336 304 80 304
WIRE 608 352 608 128
WIRE 1072 352 1072 144
WIRE 752 384 752 368
WIRE 80 464 80 304
WIRE 608 512 608 432
WIRE 1072 512 1072 432
FLAG 80 464 0
FLAG 608 512 0
FLAG 480 -112 0
FLAG 864 272 0
FLAG 752 384 0
FLAG 1072 512 0
SYMBOL res 64 144 R0
SYMATTR InstName R1
SYMATTR Value 12R4
SYMATTR SpiceLine tol=0.1 pwr=0.2
SYMBOL cap 320 160 R0
SYMATTR InstName C1
SYMATTR Value 1nC
SYMBOL current 80 -80 R0
WINDOW 3 24 28 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(-0.1 0.1 1 0.001 0.001 0.2 0.4)
SYMATTR InstName I1
SYMBOL voltage 608 336 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=0
SYMATTR InstName V1
SYMATTR Value -12V
SYMBOL voltage 480 -240 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL res 736 112 R0
SYMATTR InstName R3
SYMATTR Value 1000R
SYMBOL res 736 272 R0
SYMATTR InstName R4
SYMATTR Value 1000R
SYMBOL Opamps\\LTC1050 608 32 R0
SYMATTR InstName U2
SYMBOL Opamps\\LTC1050 1072 48 R0
SYMATTR InstName U1
SYMBOL res 1056 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 386R
SYMBOL voltage 1072 336 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=0
SYMATTR InstName V4
SYMATTR Value -12V
SYMBOL res 848 -112 R0
SYMATTR InstName R5
SYMATTR Value 100kR
SYMBOL References\\LT1634-2.5 864 208 R0
SYMATTR InstName U4
TEXT -32 504 Left 2 !.tran 0 5 0