[sdiy] Waveform/source mixers in classic polysynths

[mskala at ansuz.sooke.bc.ca]

On Fri, 6 Oct 2017, mark verbos wrote:
> > conversion is done by the common base transistor feeding the iABC pin
> > of the OTA.  The common base configuration also happens to have a high
> > output impedance which is precisely what a current source is.
>
>
> Isn’t that a linear current source?

Linear in applied current if you feed it with a current source, but
exponential (inverse log) in applied voltage if you feed it with a
voltage.

-- 
Matthew Skala
mskala at ansuz.sooke.bc.ca                 People before principles.
http://ansuz.sooke.bc.ca/