[sdiy] More new Alfa chips - CEM3394

Walker Shurlds walkershurlds at gmail.com
Sun Apr 7 02:28:18 CEST 2019


Unless I’m missing something there isn’t even enough information... that’s 1% typical, 3% max for ... what? 1V 1kHz? 100mV 500Hz? And shouldn’t the distortion vary by the control voltage?

~Walker
On Apr 6, 2019, 19:06 -0500, Michael Zacherl <sdiy-mz01 at blauwurf.info>, wrote:
>
>
>
> > 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.
> m.
>
> > -----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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