Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ihnp4!ptsfa!ames!rutgers!mit-eddie!uw-beaver!ubc-vision!alberta!calgary!thompson 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. ------------------------------------------------------------------------------ Bruce Thompson | Disclaimer? But...but... I didn't University of Calgary, | say anything....really! Well, Computer Science Department | nothing of any interest anyways. (403)220-3538 or (403)220-5109 (office) |