[time-nuts] Re: DIY Low offset Phase Noise Analyzer (Erik Kaashoek)

[Chris Caudle]

On Tue, July 5, 2022 5:27 am, Mike Monett via time-nuts wrote:
> The phase-frequency detector has zero ripple at lock.

The PF detector also locks at 0 degrees offset.  How do you get the
demodulated phase noise out of that?
The point of the a diode mixer is that it locks at quadrature, and the
output is 0V DC at that point, but any instantaneous phase offset (i.e.
phase noise from reference and DUT) shows up as AC signal at the output.

-- 
Chris Caudle