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Path: utzoo!utcs!lsuc!pesnta!amd!amdcad!mike
From: mike@amdcad.UUCP (Mike Parker)
Newsgroups: net.analog
Subject: Re: Video A/D converters
Message-ID: <1473@amdcad.UUCP>
Date: Thu, 30-May-85 21:06:30 EDT
Article-I.D.: amdcad.1473
Posted: Thu May 30 21:06:30 1985
Date-Received: Fri, 31-May-85 06:41:39 EDT
References: <127@uvicctr.UUCP> <465@crystal.UUCP>
Distribution: net
Organization: AMDCAD, Sunnyvale, CA
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In article <465@crystal.UUCP>, pda@crystal.UUCP writes:
> 
> A flash encoder is in effect a stack of 2**n comparators with a laser trimmed
> resistor network for the reference voltage at each comparator.  The physical
> layout of the board around these devices is critical for good performance. They
> have a tremendous bandwidth and are integrating digital and analog electronics
> on one board.  Watch out for noise to couple through the board grounds and many
> other places.
> 
> 	Paul Anderson
> 	University of Wisconsin
> 	Computer Sciences Dept.
> 	Madison, Wis 53706

Actually the board layout at 4 Mhz isn't all that critical. It
isn't nearly the problem that noise elimination at 100Mhz presents.

Mike @ AMDCAD