Version 4 SHEET 1 880 680 WIRE 192 -160 32 -160 WIRE 192 -112 192 -160 WIRE 32 -48 32 -160 WIRE 192 0 192 -32 WIRE -128 80 -384 80 WIRE 32 80 32 32 WIRE 32 80 -48 80 WIRE 80 80 32 80 WIRE 192 80 160 80 WIRE 304 80 192 80 WIRE 448 80 368 80 WIRE 192 112 192 80 WIRE 304 112 304 96 WIRE -384 128 -384 80 WIRE 192 192 192 176 WIRE -384 240 -384 192 WIRE -384 368 -384 320 FLAG 192 192 0 FLAG 192 0 0 FLAG -384 368 0 FLAG 448 80 out FLAG 32 80 in FLAG 304 112 0 SYMBOL Digital\\schmtbuf 304 16 R0 SYMATTR InstName A1 SYMATTR SpiceLine2 Trise=6n Tfall=6n Td=10n SYMATTR SpiceLine Vhigh=3.3 Vlow=0 Vt=2.0 Vh=1.2 SYMBOL cap 176 112 R0 SYMATTR InstName C1 SYMATTR Value 0.1µ SYMATTR SpiceLine V=25 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GCM155R71E104KE02" type="X7R" SYMBOL res 176 64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 10k SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL res 16 -64 R0 SYMATTR InstName R2 SYMATTR Value 1K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL res -32 64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 200 SYMBOL voltage 192 -128 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 3.3 SYMBOL voltage -384 224 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value PWL(0 3.3 1m 3.3 1.2m 0 1.4m 0 1.6m 3.3 1.8m 3.3 2.0m 0 2.2m 0 2.4m 3.3 2.6m 3.3 2.8m 0 10m 0) SYMBOL schottky -400 128 R0 SYMATTR InstName D1 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode TEXT -418 392 Left 2 !.tran 0 10m 0