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XNOR Gate

A project log for Tern - Ternary Logic Circuits

A series of ternary logic gates and higher level components implemented in the real world.

mechanical-advantageMechanical Advantage 08/23/2015 at 06:180 Comments

I've finished working out the ternary gate most closely analogous to the Binary XNOR gate. In Kleene logic it would be called the Biconditional or the Equivalence connective. I don't have a better name for it, so I'll borrow the boolean term XNOR. This was built using the expedient of copying the boolean method of chaining together four NOR gates like so:

In my ternary system I simply replaced the NOR gates with Antimax gates and it worked nicely. I think I may be able to simplify it a bit, but I'm not sure yet. Here's a picture of the resulting rats nest.

I tried out the "5E" boards as a replacement for a traditional breadboard. My analysis: They beat the hell out of breadboards in every single way. However, the manufacturing of the power rails is awful. Every insertion is a battle of will. If they just fixed that the 5E board would be totally superior.

In this circuit I changed things up a bit and used LM393's instead of the 319's I've been using thus far. That went pretty well.

And to continue the saga of my diode testing, I attempted this circuit using the small signal silicon diodes. Fail. After replacing a few at random with Schottky diodes it worked. Schottky all the way!

Enough jibber-jabber. Here's the schematic.

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