Version 4
SHEET 1 880 680
WIRE -160 -112 -352 -112
WIRE -48 -112 -80 -112
WIRE -16 -112 -48 -112
WIRE 96 -112 64 -112
WIRE -352 -64 -352 -112
WIRE -48 -32 -48 -112
WIRE 192 -32 -48 -32
WIRE 464 -32 256 -32
WIRE -352 48 -352 16
WIRE 288 64 288 48
WIRE 256 80 224 80
WIRE 464 96 464 -32
WIRE 464 96 320 96
WIRE 544 96 464 96
WIRE -160 112 -352 112
WIRE -48 112 -48 -32
WIRE -48 112 -80 112
WIRE 32 112 -48 112
WIRE 160 112 112 112
WIRE 256 112 160 112
WIRE 464 128 464 96
WIRE 160 144 160 112
WIRE 288 144 288 128
WIRE -352 160 -352 112
WIRE 224 224 224 80
WIRE 464 224 464 208
WIRE 464 224 224 224
WIRE 160 240 160 208
WIRE 464 240 464 224
WIRE -352 272 -352 240
WIRE 160 352 160 320
WIRE 464 352 464 320
WIRE 160 464 160 432
FLAG 160 464 0
FLAG -352 272 0
FLAG -352 112 IN
FLAG 160 320 V+
FLAG 288 144 0
FLAG 288 48 V+
FLAG 464 352 0
FLAG 160 240 0
FLAG 544 96 OUT
FLAG -352 48 0
FLAG 96 -112 0
SYMBOL voltage 160 336 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -352 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 4 0 .1u .1u 62.5u 125.0u)
SYMBOL Opamps\\LTC6085 288 96 R0
SYMATTR InstName U1
SYMBOL Misc\\EuropeanResistor 16 128 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 20k
SYMBOL Misc\\EuropeanResistor 448 112 R0
SYMATTR InstName R2
SYMATTR Value 13k
SYMBOL Misc\\EuropeanResistor 448 224 R0
SYMATTR InstName R3
SYMATTR Value 20k
SYMBOL Misc\\EuropeanResistor -176 128 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 30k
SYMBOL cap 144 144 R0
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL cap 192 -16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 1n
SYMBOL Misc\\EuropeanResistor -176 -96 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL voltage -352 -80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 1.25
SYMBOL Misc\\EuropeanResistor -32 -96 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 100k
TEXT -376 408 Left 2 !.tran 0.5m
TEXT -224 408 Left 2 !.options plotwinsize=0
TEXT -104 -200 Left 2 ;20kOhm
LINE Normal -16 160 -176 160 2
LINE Normal -16 -64 -16 160 2
LINE Normal 80 -64 -16 -64 2
LINE Normal 80 -176 80 -64 2
LINE Normal -176 -176 80 -176 2
LINE Normal -176 160 -176 -176 2
LINE Normal -176 160 -176 160 2