Switching Capacitor VCO

[List, Christopher]

Hey Mikko you can't fool me! I've got a printout of that gif with "4066"
scrawled on it where the pretty "4053" is now!
You could also build the other switch into a gate-controlled portamento
on the CV, or make one of Ric Miller's top half/bottom half waveform
switching waveshapers to combine two of your existing waveforms...

- CList

> -----Original Message-----
> From:	Mikko Helin [SMTP:MHELIN at tne01.ntc.nokia.com]
> Sent:	Thursday, December 17, 1998 2:23 PM
> To:	synth-diy at mailhost.bpa.nl
> Cc:	MHELIN at tne01.ntc.nokia.com
> Subject:	RE: Switching Capacitor VCO
> 
> >
> >I think this may have been covered already, but why is the 4066 being
> >used instead of the 4053? Wouldn't the 4053 be a little simpler and
> >leave you with a free switch for something else? Same
> on-resistance...
> >
> >- Chris
> 
> Actually the switch on my schem at http://www.uta.fi/~helin/scvco.gif
> is a 4053. There's also no square out which is the Q out on 4013.
> What good be done with the free switch on 4053? With two 4053's
> you could build three VCO's. If we use SMD's that thing takes
> not much space, too. VCO's for polyphonic synths?
> 
> -Mikko