[sdiy] More new Alfa chips - CEM3394

Michael Zacherl sdiy-mz01 at blauwurf.info
Sun Apr 7 02:03:29 CEST 2019

> On 6 Apr 2019, at 20:21, David G Dixon <dixon at mail.ubc.ca> wrote:
> Oops, nevermind!  I didn't see the crummy distortion specs before sending my
> message.  I guess it is too good to be true.

there’s hope that actual figures might be better and this numbers are honest conservative specs.
not sure, if that’s likely.

> -----Original Message-----
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of David
> G Dixon
> Sent: Saturday, April 06, 2019 10:58 AM
> To: 'Tom Wiltshire'; 'Tom Bugs'
> Cc: '*SYNTH DIY'
> Subject: Re: [sdiy] More new Alfa chips - CEM3394
> Tom said:
> **AS3364: This is a linear-control version of the AS2164
> Given the number of times the Gallo-Irwin circuit gets used to make a linear
> VCA out of the 2164, this is an excellent idea. Now you get four of them on
> one chip (instead of two linearised VCAs per 2164) without needing the extra
> op-amps. Fantastic idea. Having the option of linear or log control by
> choosing the chip you need is great.**
> I'm excited about this.  I just wonder a) how well it shuts off at 0V CV,
> and b) whether it gets noticeably warm when all the VCAs are off (which the
> Irwin circuits will do if you don't add a current limiting resistor).

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