[sdiy] Varactor-based VCF

[René Schmitz]

ChristianH schrieb:
> Furthermore, the usual target signal is high frequency, which doesn't
> interfere with the DC biasing. In our charging/discharching circuits
> (and audio is pretty much DC compared to high frequency applications) I
> would suspect that the target signal might confuse the biasing.

Indeed. Thats the reason you need to keep the signal levels below 500mV 
or so in varactor tuned oscillators. And likewise for a filter you would 
need to do the same.

Cheers,
  René

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uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159