> Using just the divider stage of a PLL IC you can go up to several GHz

Just out of interest -

The 2.5GHz FM I mentioned uses the MC12095 ( /4), MC10E016
( /125) and MC10EL32 ( /2) to divide the incoming signal frequency
by 1000 on the 100MHz - 2.5GHz channel. The initial front end amp
is an ERA-25M+

http://www.ges.cz/sheets/e/eraxx.pdf

The /1000 puts the least-significant decades speed well within the
range of a 16F877, as there's been a further /10000 by the counters
for the first 4 decades

Joe
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.