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NNTP-Posting-Date: Sat, 08 Jun 2024 00:38:59 +0000
From: Steve Goldstein <sgoldHAM@alum.mit.edu>
Newsgroups: sci.electronics.design
Subject: Re: AD5791
Date: Fri, 07 Jun 2024 20:38:57 -0400
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On Fri, 07 Jun 2024 16:21:33 -0700, boB <boB@K7IQ.com> wrote:

< snip>
>
>I'm not sure why ADI calls their Sigma-Delta rather than Delta-Sigma.
>
>Delta-Sigma is at least in the correct order for an A/D converter of
>
<snip>

They were called Delta-Sigma (using the upper-case Greek characters)
in the original paper by Inose, Yasuda, and Murakami (IRE Trans. Space
Electron. Telemetry, vol. 8, pp 205-209, Sep 1962) and in quite a
number of subsequent papers.

Whether they're called Sigma-Delta or Delta-Sigma seems to be almost a
religious argument.