Version 4
SHEET 1 1128 680
WIRE 208 -96 96 -96
WIRE 384 -96 320 -96
WIRE 528 -96 448 -96
WIRE -160 -80 -160 -96
WIRE -32 -80 -32 -96
WIRE 96 -80 96 -96
WIRE 208 -80 208 -96
WIRE -160 16 -160 0
WIRE -32 16 -32 0
WIRE 96 16 96 0
WIRE 208 16 208 0
WIRE 320 16 320 -96
WIRE 320 16 208 16
WIRE 384 16 320 16
WIRE 528 16 528 -96
WIRE 528 16 464 16
WIRE 208 32 208 16
WIRE 368 112 368 96
WIRE 208 128 208 112
WIRE 320 160 320 16
WIRE 352 160 320 160
WIRE 528 192 528 16
WIRE 528 192 512 192
WIRE 576 192 528 192
WIRE 352 224 48 224
WIRE 48 240 48 224
WIRE 368 304 368 272
WIRE 48 336 48 320
FLAG -32 16 0
FLAG -32 -96 -V
FLAG -160 16 0
FLAG -160 -96 +V
FLAG 368 304 -V
FLAG 368 96 +V
FLAG 576 192 OUT
FLAG 96 16 0
FLAG 208 128 0
FLAG 48 336 0
FLAG 48 224 IN
SYMBOL voltage -32 -96 R0
SYMATTR InstName V1
SYMATTR Value -70
SYMBOL LTC6090 416 192 R0
SYMATTR InstName U1
SYMBOL voltage -160 -96 R0
SYMATTR InstName V2
SYMATTR Value 70
SYMBOL res 480 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 435K
SYMBOL cap 448 -112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL voltage 96 -96 R0
SYMATTR InstName V3
SYMATTR Value 2.5
SYMBOL res 192 -96 R0
SYMATTR InstName R2
SYMATTR Value 16.2K
SYMBOL res 192 16 R0
SYMATTR InstName R3
SYMATTR Value 16.9K
SYMBOL voltage 48 224 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value SINE(1.25 1.35 10K)
TEXT 528 328 Left 2 !.tran 250u