Phase Noise is a measure of the spectral purity of a signal in an oscillator system. It quantifies the short-term random variation of the frequency of the signal, and is a product of thermal noise and low frequency flicker noise within the system. Most RF systems require an overall integrated phase noise specification to be met, as phase noise can corrupt both the up-converted and down-converted signal paths. In this whitepaper Peregrine discusses a way to benchmark PLL phase noise in order to easily compare performance between different PLL configurations or products.
Peregrine Semiconductor, PLL, Ultra CMOS, Noise, Phase noise