[GreenKeys] Understanding the Dovetron demodulator

[Jim Haynes]

at least the FSK portion of the set.  A good place to start is with
the patent, 4,013,965.  An easy way to get a patent is www.pat2pdf.org
where you put in the patent number and they generate a pdf you can
download.  Patents are not particularly easy reading, but this one seems
easier to follow than most of them.

jhhaynes at earthlink dot net