An inductor in series with the 220 ohm emitter resistor will improve the
phase noise floor.
The MMIC output amplifier has a wider bandwidth than necessary and
doesn't have a particularly high reverse isolation.
One could improve this by substituting a CB cascade or other discrete
amplifier cascade.
Alternative methods of extracting the signal from the collector of the
second transistor may be more effective in maintaining a low phase nose
floor.
Bruce
Bob Camp wrote:
Hi
The feedback network in the Fig 7 schematic makes a lot more sense than the
network in the first Fig 7 ....
Bob
On Dec 27, 2009, at 7:19 PM, Tom Clifton wrote:
Interesting read on a low phase noise oscillator by Chris Bartram GW4DGU
http://www.christopherbartramrfdesign.com/blaenffos/oscillator/VLNO.pdf
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