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Phase noise is defined as the ratio of the noise in a 1-Hz bandwidth at a specified frequency offset, fm, to the oscillator signal amplitude at frequency fO. The sampling process is basically a multiplication of the sampling clock and the analog input signal.
24 lip 2003 · Neil Roberts provides digital designers with an overview of phase noise and jitter, describes their impact on system performance, and identifies common circuit techniques to minimize them. Advertisement
This application note starts with a brief theoretical overview of phase noise and methods of phase noise measurement, and then focuses on practical phase noise measurement recommendations such as properly connecting a signal under test to the instrument, setting up the phase noise analyzer, and choosing appropriate settings.
8 lut 2017 · In the simplest terms, phase noise describes the stability of an oscillator in the Frequency Domain while jitter describes stability in the Time Domain. A Simple Path to Understanding Phase Noise To build an in-depth understanding of phase noise, we'll use a simple 5 step process.
Jitter defines the uncertainties in the zero-crossing times (timing events) of a periodic signal, or, in other terms, the random variations in the signal period. It is therefore the time domain corollary of the frequency domain phase noise figure.
Applications with the most stringent requirements almost always specify maximum Time Interval Error (TIE) jitter and phase noise, and may include requirements for period jitter and cycle-to-cycle jitter as well. TIE jitter and phase noise measurements require an ideal clock to compare against.
Jitter and phase noise are some of the key performance parameters of oscillators and other clocking products. With some TI oscillators offering RMS jitter near 100 fs, advanced measurement techniques and equipment can be required to accurately measure device performance.
