[sdiy] Analog Computers, Rocket City

cheater cheater cheater00 at gmail.com
Sun Jan 27 10:18:54 CET 2013


I really wish I could find Korn & Korn as an ebook somewhere. I've
wanted to check it out for a while now, but it's not in any local
libraries.

On Sun, Jan 27, 2013 at 6:02 AM, Lanterman, Aaron
<lanterma at ece.gatech.edu> wrote:
>> Adam Inglis wrote:
>
>>> These old analogue computers could be pressed into audio synthesis
>>> duties, couldn't they?
>
> The EML 101 design has an analog computer-ish feel to it. The VCF has a weird integrator structure that uses two capacitors per integrator. Someone -- Harry Bissell, maybe? I can't remember now -- mentioned that was a design that showed up in old-school analog computers.
>
> I'd highly recommend this book:
>
> G. A. Korn and T. M. Korn, Electronic Analog and Hybrid Computers. New York: McGraw-Hill, 1964.
>
> It has circuit designs I haven't seen present anywhere else, like a deadband circuit with a  diode ring in the feedback loop of an op amp that's used in the Buchla 148 Harmonic Generator, and I think one of the Sources of Uncertainty, IIRC.
>
> - Aaron
>
> P.S. As an aside… there's a *life insurance* analog computer on ebay:
>
> http://www.ebay.com/itm/RARE-Beckman-Instruments-1969-ElectroComp-Analog-Finance-Computer-Museum-ready-/190787989852?pt=LH_DefaultDomain_0&hash=item2c6bd9b15c
>
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