Version 4
SHEET 1 1128 680
WIRE 160 -112 48 -112
WIRE 48 -96 48 -112
WIRE 160 -96 160 -112
WIRE 432 -96 336 -96
WIRE 592 -96 496 -96
WIRE 48 0 48 -16
WIRE 160 16 160 -16
WIRE 336 16 336 -96
WIRE 336 16 160 16
WIRE 432 16 336 16
WIRE 592 16 592 -96
WIRE 592 16 512 16
WIRE 160 32 160 16
WIRE 400 112 400 80
WIRE -176 128 -176 112
WIRE -48 128 -48 112
WIRE 160 128 160 112
WIRE 336 160 336 16
WIRE 368 160 336 160
WIRE 592 192 592 16
WIRE 592 192 528 192
WIRE 672 192 592 192
WIRE -176 224 -176 208
WIRE -48 224 -48 208
WIRE 368 224 64 224
WIRE 64 240 64 224
WIRE 400 304 400 272
WIRE 64 336 64 320
FLAG -48 224 0
FLAG -48 112 -V
FLAG -176 224 0
FLAG -176 112 +V
FLAG 400 304 -V
FLAG 400 80 +V
FLAG 672 192 OUT
FLAG 48 0 0
FLAG 160 128 0
FLAG 64 336 0
FLAG 64 224 IN
SYMBOL voltage -48 112 R0
SYMATTR InstName V1
SYMATTR Value -70
SYMBOL voltage -176 112 R0
SYMATTR InstName V2
SYMATTR Value 70
SYMBOL res 528 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 435K
SYMBOL cap 496 -112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL voltage 48 -112 R0
SYMATTR InstName V3
SYMATTR Value 2.5
SYMBOL res 144 -112 R0
SYMATTR InstName R2
SYMATTR Value 16.2K
SYMBOL res 144 16 R0
SYMATTR InstName R3
SYMATTR Value 16.9K
SYMBOL voltage 64 224 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value SINE(1.25 1.35 10K)
SYMBOL LTC6090-5 432 192 R0
SYMATTR InstName U2
TEXT 608 424 Left 2 !.tran 250u