Version 4
SHEET 1 1100 756
WIRE -160 144 -224 144
WIRE 48 144 -80 144
WIRE 464 144 272 144
WIRE 464 160 464 144
WIRE -224 176 -224 144
WIRE 48 208 16 208
WIRE 464 256 464 240
WIRE 48 272 -64 272
WIRE 384 272 272 272
WIRE -224 288 -224 256
WIRE 384 288 384 272
WIRE -64 304 -64 272
WIRE 384 384 384 368
WIRE -64 416 -64 384
FLAG 16 208 0
FLAG -224 288 0
FLAG -64 416 0
FLAG 384 384 0
FLAG 464 256 0
SYMBOL LTC1728-3.3 160 240 R0
SYMATTR InstName U1
SYMBOL res -64 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL voltage -224 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -64 288 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PWL(0 1.05 7 1.05 8 .95 9 1.05)
SYMBOL voltage 384 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PWL(0 1.8 4 1.8 5 1.5 6 1.8)
SYMBOL voltage 464 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value PWL(0 3.3 1 3.3 2 3 3 3.3)
TEXT 528 432 Left 2 !.tran 10