[sdiy] More new Alfa chips - CEM3394

Neil Johnson neil.johnson71 at gmail.com
Tue Apr 9 23:21:19 CEST 2019


Hiya Girts,

Thanks for the links!

All the best,
Neil

On Tue, 9 Apr 2019 at 10:22, <ggg at fgi.lv> wrote:
>
> Dear colleagues, here you go!
>
>
>
> https://www.ericasynths.lv/shop/diy/diy-accessories/as3372e-signal-processor-vc-mixer-vcf-vca/
>
>
>
> https://www.ericasynths.lv/shop/diy/diy-accessories/as3394e-synthesizer-voice/
>
>
>
> Best regards,
>
>
>
> Girts, Erica Synths
>
>
>
>
>
> From: Synth-diy <synth-diy-bounces at synth-diy.org> On Behalf Of Walker Shurlds
> Sent: svētdiena, 2019. gada 7. aprīlis 03:28
> To: *SYNTH DIY <synth-diy at synth-diy.org>; Michael Zacherl <sdiy-mz01 at blauwurf.info>
> Subject: Re: [sdiy] More new Alfa chips - CEM3394
>
>
>
> 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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