[sdiy] Discrete OTA

[Phil Macphail]

If I has incorrectly attributed the design to the wrong person then I apologise, but after a bit of looking around Google turns-up this on Neil's website - 
http://www.milton.arachsys.com/nj71/misc/0drift.html 

which is dated 30th August, and the Osamu website has this page - 
http://userdisk.webry.biglobe.ne.jp/000/024/65/N000/000/000/125151002153016326829_Exp_SSM0908.PNG
Claiming to have breadboarded the design on 28th August.

So without further investigation it looks like great minds really do think alike!

Phil.

On 7 Apr 2014, at 11:48, Roman Sowa <modular at go2.pl> wrote:

> 
>>> Incorporating the expo converter is handy, but the Osamu
>>> Hoshuyama temperature compensation is a fairly compelling
>>> argument for the 2164.
> 
> all this recent talk about 2164 Osamu's compensation made me finally go and seek for this circuit. What a surprise it was when I saw it's basically the circuit I originally posted here in 1999, only refined to find the magic number of 0.27V bias.
> 
> Well, the multimania site, where I used to show ideas like that, does not work anymore, and I didn't move all to synth.net when it started, so there's only email atached GIF that's out there. Another lesson that if something is not published in internet, it does not exist.
> 
> It's not rocket science and I'm not claiming any rights to this very simple circuit that is so obvious to come up with. But still kinda feels like Antonio Meucci...
> 
> or maybe I'm just having a bad day today...
> 
> Roman
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