[sdiy] SSI2164 datasheet updated

David G Dixon dixon at mail.ubc.ca
Tue Aug 7 23:50:41 CEST 2018

The "new and improved" expo converter circuit looks quite a bit like what
we've been doing at Intellijel for several years.  The main difference is
that the amp feeding compensation current back to the CV loop is also
compensating for tracking errors in the VCO core, and is therefore variable.
In any case, I am going to be spending a fair bit of time with this new
datasheet, so thanks for posting. 

> -----Original Message-----
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On 
> Behalf Of Neil Johnson
> Sent: Tuesday, August 07, 2018 1:42 PM
> To: SDIY List
> Subject: [sdiy] SSI2164 datasheet updated
> Hi all,
> Anyone with more than a passing interest in the 2164 quad VCA 
> might be interested in the latest version of the SSI2164 
> datasheet just published online by Sound Semiconductor.
> While specifically for the SSI2164 there is a lot of useful 
> info there that also relates to the earlier SSM2164 (and the 
> Behringer/CoolAudio
> V2164 clone).
> Highlights for me:
> * Explanation and formula for working out the compensation 
> network (confirms my earlier hand-wavey analysis)
> * A superior expo converter by Dave Rossum
> * More details on the internal workings
> Direct link: 
> http://www.soundsemiconductor.com/downloads/ssi2164datasheet.pdf
> Cheers
> Neil
> --
> http://www.njohnson.co.uk
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