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PIC CCP or PLL

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Chester
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Joined: 10/03/2017 - 03:17
PIC CCP or PLL

 I have an anolog circuit that has an incoming low voltage signal that is compared to a Pot adjustable VCO, Under normal conditions the VCO is adjusted to match the incoming signal. Then , If the incoming signal changes significantly the signal is passed to an amp and a speaker.  It uses a 4046, but only for the VCO.

     I would like to do this by eliminating the 4046 and possibly using CCP in a pic micro,  My question is this possible?  I have several 16F84A's that I'd like to find a use for.  The data sheet shows they have 2 CCP modules. 

  I've also read alot about Pic PLL's but it appears to me they work by locking when a signal is the same, which is opposite of what I'm trying to do.

  Any ideas or suggestions would be kindly appreciated.

   

   Thanks