Richard Crowley wrote:
"jack" wrote ...
National Semi still makes a "frequency to voltage" converter chip, so
does Analog.
But here's a link to using a PLL -- from National Semi -- Application
Note 210
http://www.national.com/an/AN/AN-210.pdf
Note that publication is 29 years old and I don't think any
of the mentioned ICs are still in production any more.
Since when has that stopped real homebrewers? Ahh, I see a slew of cross-
posted groups (reading from r.r.a.h)
Michael