[sdiy] PLL Detuner

[Scott Gravenhorst]

Harry mentioned that the LFO and VCO not being synchronized would foul
things up.  Apparently, I knew that when I did this:

http://home1.gte.net/res0658s/fatman/PLL_Freq_Shifter.html

It's not tested, just an idea, but I think the circuit will synch the LFO
output to PLL input by using the higher frequency input as a "clock".  In
this case, the LFo causes pulses to be dropped from the input to the PLL
which should cause the output to be somewhat lower in frequency than the input.

Sorry, I did this a few years ago and didn't remember all of the details. 
As I said, I didn't test it and I'm not sure how useful it is, especially
compared to a simple VCO.

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-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
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