I haven't read all the replies in this thread, so this may have been
brought up before... Wenzel Associates make some of the lowest phase
noise oscillators commonly available, and on their web site you will
find information about keeping things low jitter/low phase noise. You
will find some simple, practical low noise circuits there, including
crystal oscillator circuits.

Cheers,
Tom

....it's Colpitts, Hartley, Clapp,Butler and Pierce!
go with Butler since it has the crystal inserted between points of low
impedance, it actually boosts the Q of the crystal above the unloaded
Q. this Q is ths single most important source of jitter and attendant
phase noise.
Saandy 4Z5KS




JJ wrote:
I am fimilar with Colpitts, Harley, Clapps, Bulter, Piece oscillators?

Which configuration with JFET or BJT would yield the highest performance
and least jitter?

JJ

On 22 Feb 2006 07:31:43 -0800, "Saandy , 4Z5KS"
wrote:

[snip]

it actually boosts the Q of the crystal above the unloaded Q.

By what magic does it do this?

"Saandy , 4Z5KS" wrote in
oups.com:

...it's Colpitts, Hartley, Clapp,Butler and Pierce!
go with Butler since it has the crystal inserted between points of low
impedance, it actually boosts the Q of the crystal above the unloaded
Q. this Q is ths single most important source of jitter and attendant
phase noise.
Saandy 4Z5KS
Good grief I wrote that rather late at night.
Have you seen a simple Butler cct using JFETS? The ARRL one uses a
transformer which I rather not use.

JJ