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.