[sdiy] Something better than CD4066 to switch CVs?

Ullrich Peter Peter.Ullrich at kapsch.net
Tue Feb 19 07:39:29 CET 2019


And if you need something like a control voltage matrix then there are special matrix analog circuits like the MT8816, MT8804,…
https://www.microsemi.com/document-portal/doc_view/127038-mt8816-datasheet-sept11


Ciao
Peter

http://www.ullrich.at.tt (my webpage)
http://www.rc100-usb.at.tt (Roland Sampler Tool)
http://synpro.heimat.eu/datadial.htm (DataDial Synth Addon)



Von: Synth-diy <synth-diy-bounces at synth-diy.org> Im Auftrag von ulfur hansson
Gesendet: Dienstag, 19. Februar 2019 03:16
An: Adrian Corston <eidorian at aladan.net>
Cc: synth-diy at synth-diy.org
Betreff: Re: [sdiy] Something better than CD4066 to switch CVs?

i second the DG series, also the 312, 313 and 314 from maxim. IIRC they will all switch bipolar signals.

the 4066 will only switch unipolar(positive) voltages...

Sent from outer space

On Feb 18, 2019, at 8:59 PM, Adrian Corston <eidorian at aladan.net<mailto:eidorian at aladan.net>> wrote:
DG4xx have a good reputation.


----- Original Message -----
From:
"Mike Beauchamp" <list at mikebeauchamp.com<mailto:list at mikebeauchamp.com>>

To:
"synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>" <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>>
Cc:

Sent:
Mon, 18 Feb 2019 20:53:43 -0500
Subject:
[sdiy] Something better than CD4066 to switch CVs?


Does anyone have any experience using chips to switch multiple CV's? I
have a recommendation to use CD4066, but was wondering if maybe there's
something more modern and appropriate.

My power supply is +/-15 and I intend to switch signals from -5 to about
+11 and including ones intended to be accurate 1v/oct pitch CV's.

I was also thinking about using one of these IC's to switch in an
additional timing capacitor in a VCO circuit (to send it into LFO land),
but I'm wondering if I'd be compromising VCO stability in any way by
tying it to the switch IC.

Mike



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