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Varactor tuning diodes.
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January 5th 04, 10:22 AM
Active8
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On Mon, 05 Jan 2004 02:40:07 +0000,
said...
On Sun, 4 Jan 2004 16:22:32 -0800, "Tim Wescott"
wrote:
The varactor capacitance change is instantaneous -- think of a capacitor
who's plate spacing is dependent on it's voltage. This is why varactors are
used for frequency multiplication -- that capacitance change "squeezes" the
pulse to generate lots of harmonics.
Rubbish. Varactors are not used for freqency mulitplication. They are
freequenty used in VXCOs for modulating (or otherwise varying) the
oscillator output frequency by means of applying a DC bias voltage
which alters the capacitance of the PN junction.
Dude, please.
--
Best Regards,
Mike
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