[sdiy] crystal bandpass filter / amplifier with CD4049UBC

[René Schmitz]

Scott Gravenhorst wrote:

>>..I'm not a RF kind of guy, but surely a specifically designed PLL chip would
>>be better? A 4046 or one of the Philips ones?
> 
> 
> Unfortunately, the 4046 PLL's VCO is spec'd at a maximum of 1.6 megaHertz.  I
> believe the application was for 10 MHz.  I found no toggle freq. spec for the
> phase comparators, so it's hard to say if a 4046 can be used with a subsitute
> VCO.  I think the phase comparators like to have a pretty big input signal.

74HC4046 can go to 10Mhz and above.

Cheers,
  René

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uzs159 at uni-bonn.de
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