Monadic Gates, Take 3

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 06/23/2015 at 16:242 Comments

Four more monadic gates down. By taking two existing gates and using diodes off of their outputs, I can arrange four more gates; 5, B, M, and P. This is because, with the diodes protecting the return path to the LM319's, the resulting output is always the greater output of the two different gates. Here's the diagram. [Edit - 5 and P were screwed up here, diagrams in later project logs have them marked correctly].

I had actually worked out a method to produce gates A, N, and T as well, but it required the use of two LM319's. By using the above technique with diodes, I am sure I can simplfy them to only use a single 319. Here is the existing, more complicated diagram. I'll submit a revised one once I've tested out the idea.

Once I've worked out all monadic gates I'll post a single comprehensive diagram giving each one in order.


Mechanical Advantage wrote 04/09/2019 at 06:45 point

Thanks for letting me know! I thought I fixed all those old links but I guess I missed this post. The links now point to the correct files hosted on

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retrac wrote 03/31/2019 at 17:26 point

It looks like your diagram links in your posts are 404 now! :(

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