Category Archives: Phase Noise

NIST on phase detectors and some verification.

Posted on 26 December, 2018 by Thomas S. Knutsen

NIST has some interesting articles on their website, one of them being a 5 MHz phase detector with low residual flicker [1] for measuring phase noise.  This spurred some discussions and a series of measurements on my part. The interesting … Continue reading →

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Si5351 Spurius preformance

Posted on 31 December, 2016 by Thomas S. Knutsen

As some of you know, I have done a lot of work with the Si5351 series of synthesizers. In a couple of blog post, I will try to document some of the more subtile details of operation of this chip. … Continue reading →

Posted in Phase Noise, Si5351 | 1 Comment

A notch filter for phase noise measurment

Posted on 1 February, 2015 by Thomas S. Knutsen

Measuring phase noise is difficult, due to the large difference between the signal and the noise.  Here I will outline the method I use to determine the noise of a oscillator and show the basic bandpass – notch filter used … Continue reading →

Posted in Filter, Phase Noise, Uncategorized | Leave a comment