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From: "Peter O. Brackett"
Subject: Re: Historical question: negative feedback and the op amp
Date: Wed, 13 Nov 2002 03:23:48 -0500
Organization: MindSpring Enterprises
X-Server-Date: 13 Nov 2002 08:23:50 GMT
X-Newsreader: Microsoft Outlook Express 5.00.2919.6600
"Mike" wrote in message
> Harold Black came up with his negative feedback theory in 1927, yet the
> first op-amp wasn't invented until the 1950s.
> The op-amp seems like such a natural extension, once you know about
> feedback. Why did it take so long for the op-amp to come along?
> -- Mike --
The Op-Amp *concept* requires "infinite gain" and back in those days, gain
was definitely not cheap.
I'm sure that if anyone were to have thought along those lines
[approximately infiinite gain] back
then, they would have stopped short because it would have seemed an absurd
thought at the time.
All good things have their time.
Indialantic By-the-Sea, FL.
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