Re: Stupid 4024 freq divider question (shaft encoder resolution)

From: petrus bitbyter (p.kralt_at_reducespamforchello.nl)
Date: 03/01/05 

Date: Tue, 01 Mar 2005 20:59:43 GMT

"Jim Thompson" <thegreatone@example.com> schreef in bericht
news:rsh9215qoadak5q7j3hpdo1drunbecls0q@4ax.com...
>
> So is this symbol "moderneeze" for XOR?
> __
> -| |
> |=1|-
> -|__|
>
> I would've never guessed ;-)
>
> ...Jim Thompson

Well, don't shoot at the pianist. It's not my idea but sure, an AND gate is
a square or a rightangle with an & in it, an OR with >=1 (although in the
mathematical notation wich I have not available in ASCII) a XOR has the =1
like you mentioned already. There are more bright ideas. A triangle in the
square represents an amplifier and a hysteresis sign a threshold. I don't
have the whole IEC definition but only a small book containing the most
important things I had to teach my students at the time. But you have to
admit it makes ASCII schematics a lot easier.

As for a three or more input XOR gate, FAIK the number of inputs is not
limited. So you can have A XOR B XOR C etcetera with only that one =1 sign
in it.

Schematic design packages tend to have two symbol lists. One American style
and one European style. I don't have problems with it and it gives a lot of
relief work for a lot of very important people :) But being a taxpayer :(

petrus bitbyter

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