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The Designer's Guide Community Forum › Measurements › Phase Noise and Jitter Measurements › PLL phase noise simulatioon using spectreRF
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PLL phase noise simulatioon using spectreRF (Read 3755 times)
Dinesh Agarwal
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PLL phase noise simulatioon using spectreRF
Mar 02nd, 2011, 5:04pm  
1.     I could simulate the phase noise of PFD+CP+LP using PSS and Pnoise simulation.
2.     In second case only PFD+Cp was included for same setup.

The result in both the cases are same. Is this right, i think there should some difference in twocases, as there is resistance thermal noise in LP

Pls comment
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dinesh
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rajkumar palwai
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Re: PLL phase noise simulatioon using spectreRF
Reply #1 - Apr 10th, 2011, 3:42am  
Hi Dinesh,
What is the freq range of your pss+pnoise simulation? If u are simulating at low freq, then your CP flicker noise can be so dominant that you are unable to see the filter resistor thermal noise contribution.

regards
rajkumar
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