The Designer's Guide Community
Forum
Welcome, Guest. Please Login or Register. Please follow the Forum guidelines.
Oct 21st, 2020, 12:15pm
Pages: 1
Send Topic Print
Is it possible to hand calculate the phase noise of a VCO? (Read 1719 times)
iVenky
Community Member
***
Offline



Posts: 95
Silicon Valley
Is it possible to hand calculate the phase noise of a VCO?
Apr 12th, 2016, 8:39am
 
Hi,

I am running pss/pnoise sims for a Q-VCO that I am designing. I would like to know if it's possible to hand-calculate the phase noise so that I could reduce by figuring out what exactly is causing the problem.
If so, how? I know the basic stuffs that I read on RF Microelectronics by Razavi.


Thanks
Back to top
 
 

Life is a nonlinear system. The goal is to find a solution with the least error and not an exact solution.
View Profile   IP Logged
raja.cedt
Senior Fellow
******
Offline



Posts: 1516
Germany
Re: Is it possible to hand calculate the phase noise of a VCO?
Reply #1 - May 11th, 2016, 5:48am
 
very rarely people does and mostly academic people would prefer to learn but not to match to the pnoise results. General procedure is Find ISf from all devices and get the rms of that and use th lee formulas for the Overall Phase noise.

Following articles might help.

http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7006708 (this is a innovative architecture but they have decribed how to evaluate PN noise from equation and they have correlated very well with sim as well as measurements)

http://gram.eng.uci.edu/faculty/green/public/courses/270c/materials/lectures/Wee... (from slide 52)

if you find better docs or procedure than the above please let me know kindly.

Are you aware of better procedure to find ISF??

Best Wishes,
Raj.



Back to top
 
 
View Profile WWW raja.sekhar86   IP Logged
Pages: 1
Send Topic Print
Copyright 2002-2020 Designer’s Guide Consulting, Inc. Designer’s Guide® is a registered trademark of Designer’s Guide Consulting, Inc. All rights reserved. Send comments or questions to editor@designers-guide.org. Consider submitting a paper or model.