Good morning,
a friend of mine have inserted this post on a Forum I created on my site
www.etantonio.it/en , this is the question :

"Someone knows something about LTA/WTA circuits?
I mean the best approach to the problem,
the best topology and all that can be usefull
to design an accurate and high-speed LTA?"

I don't know the answer, if you know it please post it just following this link:

http://www.etantonio.it/Forum/topic.asp?TOPIC_ID=15

Many Thanks,

Eng. Antonio D'Ottavio
etantonio@etantonio.it
www.etantonio.it/en/

Etantonio wrote:
No way I am going to bother with various private forums. Usenet is
quite satisfactory, thank you. Ask here, read here.

It sounds vaguely like a voting circuit, which is a key factor in
high reliability systems built around redundant modules. The truth
table for a three input component might be:

input output failed node id
000 0 0 = 00 (binary)
001 0 1 = 01
010 0 2 = 10
011 1 3 = 11
100 0 3 = 11
101 1 2 = 10
110 1 1 = 01
111 1 0 = 00

and all inputs other than 000 and 111 indicate a failure
somewhere. You can build this out of three 2 input nands, and one
3 input nand. Analog methods can cut the component count.
Implementing a failed node id may be useful in servicing.

Of course, quis custodes custodiet applies.

--
"If you want to post a followup via groups.google.com, don't use
the broken "Reply" link at the bottom of the article. Click on
"show options" at the top of the article, then click on the
"Reply" at the bottom of the article headers." - Keith Thompson

Many thanks for your answer,
I'll forward it to my friend,
Bye ...

Antonio



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