Version 4
SHEET 1 940 680
WIRE 592 64 -352 64
WIRE -352 80 -352 64
WIRE 592 80 592 64
WIRE -352 176 -352 160
WIRE 16 176 -208 176
WIRE 32 176 16 176
WIRE 496 176 288 176
WIRE 592 176 592 160
WIRE 592 176 496 176
WIRE -208 192 -208 176
WIRE 496 192 496 176
WIRE 592 192 592 176
WIRE 16 240 16 176
WIRE 32 240 16 240
WIRE 320 240 288 240
WIRE 432 240 400 240
WIRE 496 272 496 256
WIRE -208 288 -208 272
WIRE 592 288 592 272
WIRE 32 304 16 304
WIRE 304 304 288 304
WIRE 32 368 16 368
WIRE 320 368 288 368
WIRE 432 368 432 240
WIRE 432 368 400 368
WIRE 432 384 432 368
WIRE 432 480 432 464
FLAG -208 288 0
FLAG -352 176 0
FLAG 304 304 0
FLAG 432 480 0
FLAG 16 368 0
FLAG 16 304 0
FLAG 592 288 0
FLAG 496 272 0
SYMBOL voltage -208 176 R0
WINDOW 0 23 24 Left 2
SYMATTR InstName V1
SYMATTR Value PWL(0 0 1m 2.5)
SYMBOL voltage -352 64 R0
WINDOW 3 27 89 Left 2
SYMATTR Value PWL(0 0 1m .8)
SYMATTR InstName V2
SYMBOL res 416 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL voltage 432 368 R0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL LTC2906 160 272 R0
SYMATTR InstName U1
SYMBOL res 576 64 R0
SYMATTR InstName R2
SYMATTR Value 49.9K
SYMBOL res 576 176 R0
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL cap 480 192 R0
SYMATTR InstName C2
SYMATTR Value .1µ
SYMBOL res 416 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 100K
TEXT 208 464 Left 2 !.tran 300m