[sdiy] integrator / capacitor leakage

Aaron Lanterman lanterma at ece.gatech.edu
Tue Dec 6 08:27:17 CET 2005


>> That's precisely (sorry!) the approach used in the Encore Electronics
>> frequency shifter.
>
> I know. I have seen a preliminary analogue version, but I'm sure there was a
> reason
> they went digital.

If you're really just needing sine waves - which are easy to make 
digitally without aliasing - it's hard to come up with a solid reason that 
analog is necessarily better in that application.

I recall reading somewhere that the new Buchla 261e takes this approach - 
it makes sine waves digitally, and then does all the waveshaping with 
analog circuitry. Interesting hybrid...

  - Aaron

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