18 May
2009
18 May
'09
10:14 p.m.
On May 18, 2009, at 5:04 PM, Chuck Guzis wrote:
Wow. That's pretty damn impressive.
-Dave
--
Dave McGuire
Port Charlotte, FL
Oh, how
thoroughly bizarre. Thanks for the explanation. I'd love
to see a SPICE simulation of that.
What's noteworthy is the stability of the thing. ISTR that DTMF
signalling relies on a tolerance of something like +/-2%. A mass-
produced LC oscillator that operates reliably close to tolerances in
a steel mill or a meat-packing plant is a marvel.