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What is the PSD of noise generated using rdist_normal function? (Read 81 times)
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What is the PSD of noise generated using rdist_normal function?
May 29th, 2018, 6:51pm
 
In the designer's guide document on jitter model of VCO, I understand that the Sigma from integrated noise is already assumed to be extracted. This is used to generate phase noise. Oscillator does the accumulation every cycle. But, Ideally I could have multiple PSDs giving me the same integrated noise power. So does generating a sequence of numbers using just the defined variance, guarantee any frequency distribution? Is it white?
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Re: What is the PSD of noise generated using rdist_normal function?
Reply #1 - May 31st, 2018, 3:23am
 
So to add more details, the an undefined PSD for the noise generated means that I could have any shape of PSD and just hope that my PLL filters out the noise from the VCO noise model. The below given examples are different possibilities of having the same sigma but different PSDs. In case anyone would like to comment on anything I'm missing, please do as it is not of any use for a designer to spend time using an unknown or unrealistic AMS or verilogA model in his PLL  design.
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