Version 4
SHEET 1 1280 680
WIRE 640 -144 544 -144
WIRE 800 -144 640 -144
WIRE 256 -128 160 -128
WIRE 416 -128 256 -128
WIRE 720 -112 688 -112
WIRE 336 -96 304 -96
WIRE 544 -16 544 -144
WIRE 160 0 160 -128
WIRE 688 0 688 -112
WIRE 1200 0 1168 0
WIRE 304 16 304 -96
WIRE 640 16 640 -144
WIRE 672 16 640 16
WIRE 1200 16 1200 0
WIRE 256 32 256 -128
WIRE 288 32 256 32
WIRE 800 32 800 -144
WIRE 800 32 736 32
WIRE 896 32 800 32
WIRE 416 48 416 -128
WIRE 416 48 352 48
WIRE 448 48 416 48
WIRE 544 48 528 48
WIRE 576 48 544 48
WIRE 672 48 656 48
WIRE 64 64 16 64
WIRE 160 64 144 64
WIRE 192 64 160 64
WIRE 288 64 272 64
WIRE 656 64 656 48
WIRE 272 80 272 64
WIRE 1200 112 1200 80
WIRE 16 128 16 64
WIRE 656 144 656 128
WIRE 688 144 688 64
WIRE 688 144 656 144
WIRE 272 160 272 144
WIRE 304 160 304 80
WIRE 304 160 272 160
WIRE 688 160 688 144
WIRE 304 176 304 160
WIRE 16 256 16 208
FLAG 16 256 0
FLAG 896 32 vout
FLAG 304 176 0
FLAG 336 -16 0
FLAG 1200 112 0
FLAG 688 160 0
FLAG 720 -32 0
SYMBOL voltage 16 112 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -77 -191 VRight 2
SYMATTR Value2 AC 1.65
SYMATTR Value PULSE(0 3.3 0 50n 50n 200u 400u 100)
SYMATTR InstName V1
SYMBOL res 1184 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 4k
SYMBOL cap 1184 16 R0
SYMATTR InstName C2
SYMATTR Value 1800p
SYMATTR SpiceLine Rser=1
SYMBOL res 288 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 4k7
SYMBOL voltage 336 -112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 3.3
SYMBOL Opamps\\LTC6255 320 48 R0
SYMATTR InstName U2
SYMBOL res 160 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 4k7
SYMBOL cap 144 0 R0
SYMATTR InstName C6
SYMATTR Value 1n8
SYMBOL cap 256 80 R0
SYMATTR InstName C7
SYMATTR Value 1n5
SYMBOL res 672 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 4k7
SYMBOL voltage 720 -128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 3.3
SYMBOL Opamps\\LTC6255 704 32 R0
SYMATTR InstName U1
SYMBOL cap 528 -16 R0
SYMATTR InstName C1
SYMATTR Value 4n4
SYMBOL cap 640 64 R0
SYMATTR InstName C3
SYMATTR Value 680p
SYMBOL res 544 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 4k7
TEXT 888 -136 Left 2 !.tran 5m
TEXT 888 -112 Left 2 !;.ac dec 512 1 5Meg