[sdiy] VCO Linear Voltage

[René Schmitz]

David G. Dixon schrieb:

>> I've gotten many questions similar to this one the past few months.  Can't
>> you "simply" do blah blah blah with an existing VCO?   Sorry, but no.
> 
> My apologies, Ian, but I've got the 2164 Expo VCO on the brain (as you are
> only too painfully aware).  I wasn't thinking about those "other" VCOs with
> conventional expo converters based on matched pairs.  The 2164 can process
> currents of either polarity.

A thought that had crossed my mind as well. THe other option for a more 
traditional design is to parallel a second PNP pair, forming a blackmer 
cell. (If you let the current run into a virtual GND...)

Cheers,
  René