> My understanding is that Chris' variant of this particular Driscoll osc.
> has been designed specifically for low close-in phase noise, and that is
> why the phase-shift network has a low-pass response (to try and reduce
> flicker noise) rather than the more common high-pass network.
>
> Th
Grant Hodgson wrote:
I've had several discussions with Chris Bartram about this and similar
VHF oscillators.
My understanding is that Chris' variant of this particular Driscoll
osc. has been designed specifically for low close-in phase noise, and
that is why the phase-shift network has a low-
I've had several discussions with Chris Bartram about this and similar
VHF oscillators.
My understanding is that Chris' variant of this particular Driscoll osc.
has been designed specifically for low close-in phase noise, and that is
why the phase-shift network has a low-pass response (to try
dk...@arcor.de wrote:
- Original Nachricht
Von: Bruce Griffiths
An: Discussion of precise time and frequency
measurement
Datum: 28.12.2009 06:52
An inductor in series with the 220 ohm emitter resistor will improve the
phase noise floor.
In theory, yes. But alr
- Original Nachricht
Von: Bruce Griffiths
An: Discussion of precise time and frequency measurement
Datum: 28.12.2009 06:52
>
> An inductor in series with the 220 ohm emitter resistor will improve the
> phase noise floor.
In theory, yes. But already with only 220 Ohms,
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 casca
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/blaenf
Tom Clifton wrote:
Interesting read on a low phase noise oscillator by Chris Bartram GW4DGU
http://www.christopherbartramrfdesign.com/blaenffos/oscillator/VLNO.pdf
There are several VHF crystal Oscillators designed by M Driscoll.
The one shown is merely derived from one variant.
It has an
Interesting read on a low phase noise oscillator by Chris Bartram GW4DGU
http://www.christopherbartramrfdesign.com/blaenffos/oscillator/VLNO.pdf
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