Version 4
SHEET 1 932 680
WIRE 128 64 48 64
WIRE 304 64 208 64
WIRE 48 176 48 64
WIRE 48 176 -320 176
WIRE 80 176 48 176
WIRE 304 176 304 64
WIRE 304 176 272 176
WIRE -320 192 -320 176
WIRE 80 240 48 240
WIRE 400 240 272 240
WIRE 512 240 400 240
WIRE 672 240 592 240
WIRE 672 256 672 240
WIRE -320 288 -320 272
WIRE -64 320 -224 320
WIRE 48 320 16 320
WIRE 80 320 48 320
WIRE 304 320 272 320
WIRE 448 320 304 320
WIRE 576 320 528 320
WIRE -224 336 -224 320
WIRE 304 336 304 320
WIRE 400 336 400 240
WIRE 576 336 576 320
WIRE 48 352 48 320
WIRE 672 352 672 336
WIRE -224 432 -224 416
WIRE 304 432 304 416
WIRE 400 432 400 416
WIRE 576 432 576 416
WIRE 48 448 48 432
FLAG 48 240 0
FLAG -320 288 0
FLAG -224 432 0
FLAG 48 448 0
FLAG 304 432 0
FLAG 400 432 0
FLAG 576 432 0
FLAG 672 352 0
SYMBOL LTC2903-D1 176 240 R0
SYMATTR InstName U1
SYMBOL voltage -320 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 3.3 0 3.3)
SYMBOL res 224 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL res 32 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 36.5K
SYMBOL res 32 336 R0
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL voltage -224 320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 2.5 0 2.5)
SYMATTR InstName V2
SYMBOL res 288 320 R0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 384 320 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL voltage 576 320 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 672 240 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 544 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 23.7K
SYMBOL res 608 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 12.4K
TEXT 424 488 Left 2 !.tran 4