Version 4
SHEET 1 880 680
WIRE 128 48 64 48
WIRE 288 48 208 48
WIRE 64 176 64 48
WIRE 64 176 -208 176
WIRE 80 176 64 176
WIRE 288 176 288 48
WIRE 288 176 272 176
WIRE -208 192 -208 176
WIRE 80 240 64 240
WIRE 384 240 272 240
WIRE 448 240 384 240
WIRE 576 240 528 240
WIRE 384 256 384 240
WIRE 576 256 576 240
WIRE -208 288 -208 272
WIRE 80 320 -32 320
WIRE 304 320 272 320
WIRE -32 336 -32 320
WIRE 304 336 304 320
WIRE 384 352 384 336
WIRE 576 352 576 336
WIRE -32 432 -32 416
WIRE 304 432 304 416
FLAG 64 240 0
FLAG 384 352 0
FLAG -32 432 0
FLAG 304 432 0
FLAG 576 352 0
FLAG -208 288 0
SYMBOL LTC2903-A1 176 240 R0
SYMATTR InstName U1
SYMBOL voltage -208 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 3.3 0 3.3)
SYMATTR InstName V2
SYMBOL voltage -32 320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 2.5 0 2.5)
SYMBOL voltage 304 320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 1.8 0 1.8)
SYMATTR InstName V3
SYMBOL voltage 576 240 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 1.2 0 1.2)
SYMBOL res 368 352 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 432 256 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 12.4K
SYMBOL res 224 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10K
TEXT 608 416 Left 2 !.tran 4