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From: stephen@corp.telecom.co.nz (Richard Stephen)
Newsgroups: sci.electronics,comp.dsp
Subject: Re: A question about the Nyquist theorm
Keywords: Oversampling, A/D
Message-ID: <1991Mar14.081937.19255@corp.telecom.co.nz>
Date: 14 Mar 91 08:19:37 GMT
References: <20408@shlump.nac.dec.com> <625@ctycal.UUCP> <3354@phred.UUCP>
Followup-To: sci.electronics,comp.dsp
Organization: Technology Strategy, Telecom Corporation of New Zealand
Lines: 35

In article <3354@phred.UUCP> jefft@phred.UUCP (Jeff Taylor) writes in
response to 
>In article <625@ctycal.UUCP> ingoldsb@ctycal.UUCP (Terry Ingoldsby) writes:
>>Pursuing the discussion of the Nyquist theorem, I have a question
>>about practical sampling applications.  If you have a sine wave at
     [...etc...]
>
>I wrote this about 5 years ago, and have posted it a couple of times in the
>past.  Nyquest and Oversampling/zero filling seems to be on of those things
>that most people know about, but don't really understand.  I've gotten enough
>mail back saying this clears up some of the same sorts of questions that are
>appearing again - that I'll post it again. 

 [...etc...long explanation deleted...]

For those interested, check out the following paper:

MAX W HAUSER: Principles of Oversampling A/D conversion; J. Audio Eng.
Soc., Vol 39, No 1/2 1991 (January/February)
The first sentence of the abstract says:
"Growing practical importance of oversampling analog-to-digital
converters (OSDACs) reflects a synergism between microelectronic
technology trends and signal theory, neither of which alone is sufficient
to explain OSDACs fully......"

Besides being an excellent comprehensive discourse, it has one the best
collected bibliograhies on A/D, sampling, noise, digital filters, dither
etc that I have ever seen.

richard
============================ Richard Stephen ===============================
|   Technology Strategy             |      email: stephen@corp.telecom.co.nz
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