[sdiy] CMOS Switch as VCA?

[Dave Manley]

>>> Forgive the dumbness of the question, but has anyone tried using a standard CMOS switch (4016/4066) as a "sort of" VCA?  I mean with an actual linear CV input, not using PWM.  I haven't tried it and I've never seen any reference to it, but I can picture it almost working, though probably not in an optimal kind of way.  At least it wouldn't have the CV feedthrough problems of a single transistor VCA....
>>>
>>> Any ideas?
>>>
>>>       
Per the datasheet the 4066 control inputs are buffered through 3 
inverters.  You won't get any kind of linear response  using this part.  
Most of the "oddball" CD4xxx circuits that use "digital" parts for 
analog purposes use the "UB", or "unbuffered" parts which allows them to 
be used, pretty much, as a bunch of transistors in one package.  Google 
"cd4069 linear" for some relevant info.

-Dave