alright then I'll have another go at a more useful response, and I will
provide a reference
Try Floyd Gardiner's book , "Phaselock Techniques". I have the 3rd
edition in my hand, There is a whole chaptor on phase detectors Chapter
10. ISBN 978-0-471-43063-6
There is an excellent section on the effect of the PD s-curve on
different applications.
The waveforms input to the phase detector should be tailored to the
particular phase detector in use.
The needs of the phase comparator really are dictated by the needs of
the application- PLL or FLL or both . Sensitivity to harmonics may
actually be desirable... long live the XOR gate !
Example - Harmonic phase (all of them) may influence a phase
comparator with wide bandwidth much more than one with narrow bandwidth.
- but this may only generate a fixed phase error and this may not bother
a frequency locked loop.
A double balanced mixer with pure sine wave sources is probably the gold
standard
Horses for courses
On 7/02/2022 9:03 pm, [email protected] wrote:
Just being rude Glen.
I'm searching for a source document that someone could share. Just that.
-----Original Message-----
From: glen english LIST <[email protected]>
Sent: 6 de fevereiro de 2022 22:51
To: [email protected]
Subject: [time-nuts] Re: PLL subharmonic spurs
This sounds a little off-topic.
If you are interested in harmonics of the reference frequency at the input
to the phase detector, this will be entirely defined by the fourier series
of the source. Get yourself a 2nd year EE student, they'll have this info
for you.
There will also be harmonics and products generated by the phase detector
inputs, perhaps, since logic gates have to square up rounded inputs.
depends what sort of phase detector all the way from full linear multiplier
to an XOR gate !
glen
On 7/02/2022 9:27 am, [email protected] wrote:
I'm really interested to estimate are multiple of the reference frequency
(i.e. at the input of phase detector).
--
Glen English
RF Communications and Electronics Engineer
CORTEX RF
Pacific Media Technologies Pty Ltd trading as Cortex RF
ABN 40 075 532 008
PO Box 5231 Lyneham ACT 2602, Australia.
au mobile : +61 (0)418 975077
_______________________________________________
time-nuts mailing list -- [email protected] -- To unsubscribe send an
email to [email protected]
To unsubscribe, go to and follow the instructions there.
