[sdiy] Mind blown -- TL074 saturated outputs different

Tony Kalomiris weplar at gmail.com
Mon Dec 17 16:47:31 CET 2018

ETI Canada featured many of Tim Orr's electro music articles and circuits.

He wrote for PE (Practical Electronics UK) as well. Excellent series on
op-amps.(Feb '79)
And of course Wireless World Elektor Formant synthesizer with D.W. Thomas.
(Aug. ­ Oct. 1973)

Yes he did work for EMS in the early 70s but forget which designs are
credited to him.

Tony K

From:  Adam Inglis <21pointy at tpg.com.au>
Date:  Mon, 17 Dec 2018 14:57:47 +1000
To:  René Schmitz <synth at schmitzbits.de>
Cc:  <synth-diy at synth-diy.org>
Subject:  Re: [sdiy] Mind blown -- TL074 saturated outputs different

> Just found this VCO schematic online that features this:
> page 16
> dual integrator quadrature VCO (sinusoidal, not sure how useful for synths)
> using 3080 OTA
> https://www.americanradiohistory.com/Archive-Electronics-Today/Canada/70s/ETI-
> CA-1978-12.pdf
> Article is by Tim Orr, who I think used to work for EMS?

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