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Simulators >> RF Simulators >> Phase Noise Simulation of Injection Locked Oscillator
https://designers-guide.org/forum/YaBB.pl?num=1513178853

Message started by sarthak on Dec 13^th, 2017, 7:27am

Title: Phase Noise Simulation of Injection Locked Oscillator
Post by sarthak on Dec 13^th, 2017, 7:27am

I am using the following setting for calculation of the phase noise using PSS and PNOiSE analysis:
PSS:
Beat Frequency = 50MHz (Same as the injection frequency)
Number of Harmonics = 100

PNOISE:
SweepType = relative
Relative Harmonic = 100 (Because oscillator frequency is 5G = 100*50M)
Start and Stop Frequencies = 10k and 100M
Maximum Sideband = 15

I am getting results which seem correct. Just wanted to make sure if these parameters are correct. In particular, I am not sure if relative harmonic is the harmonic of the beat frequency or the oscillator frequency?
Thanks!

Title: Re: Phase Noise Simulation of Injection Locked Oscillator
Post by deba on Dec 14^th, 2017, 2:46am

Your settings are correct. Just make sure that maxacfreq is set to maximum_sideband times the oscillation_frequency. Otherwise the noise folding is not taken into account.

Title: Re: Phase Noise Simulation of Injection Locked Oscillator
Post by sarthak on Dec 14^th, 2017, 2:59am

Thank you for replying.
Should I also change the maxstep setting in the simulation?