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ANYGATE IN A STORM


Circuit Cellar Online
THE MAGAZINE FOR COMPUTER APPLICATIONS
Circuit Cellar Online offers articles illustrating creative solutions
and unique applications through complete projects, practical
tutorials, and useful design techniques.

ANYGATE IN A STORM

Silicon Online by Tom Cantrell

Start ý Fly by Wire ý Mooreýs Unlaw ý Sources and PDF

FLY BY WIRE

As you can see from Figure 1, under-the-hood AnyGate boils down to a two-input multiplexer.

Note that the true pin of a pair is internally pulled down, and the complement pin is biased halfway between VCC (2.3 to 5.7 V) and ground with a voltage divider (see Figure 1). Leaving both pins open establishes a 0 input, and connecting the true pin to VCC and leaving the complement pin open establishes a 1 input.

Figure 1ýAnyGate has 10 pins and almost no waiting.

 

Although it is becoming a bit of a lost art in these days of synthesized HDL Systems-on-Chips, old-timers will recall that you can do the Boolean boogie with a complementary 2:1 mux (see Figure 2) and come up with just about, dare I say, any gate.

Figure 2ýAnyGate isnýt a whopper of a chip, but you can still wire it your way.

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