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From: thompson@calgary.UUCP
Newsgroups: sci.electronics,rec.music.synth
Subject: Re: DCO's revisited - an inquiry into hardware implementation
Message-ID: <999@vaxb.calgary.UUCP>
Date: Mon, 6-Jul-87 17:00:20 EDT
Article-I.D.: vaxb.999
Posted: Mon Jul  6 17:00:20 1987
Date-Received: Fri, 10-Jul-87 02:43:15 EDT
References: <235@cogent.UUCP>
Organization: U. of Calgary, Calgary, Ab.
Lines: 22
Keywords: now for the real work...
Xref: utgpu sci.electronics:813 rec.music.synth:940
Summary: Look-ahead Carry



Off the top, it's been a while since I played with hardware, but here's my
$0.05 (after inflation :-) ) worth.

	It seems to me that the fastest method would be to either purchase
or construct a look-ahead carry generator to feed into half-adders. This
should give you the least possible number of gate-delays for any word size
you wish to use. Of course a PAL will always be faster, but the construction
is more of a pain.

	Hope this helps a little,
	Bruce Thompson.

P.S.: if you loo in any good digital circuit design book there should be
a mention of look-ahead carry generation.

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Bruce Thompson				| Disclaimer? But...but... I didn't
University of Calgary,			| say anything....really! Well,
Computer Science Department		| nothing of any interest anyways.
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