Adaptive Mode-Coupled Harmonically Tuned High-Q Ultra Low Phase Noise Sources

摘要

Various reference oscillator schemes are possible as shown in Figure I.5 A 10 MHz temperature-compensated crystal oscillator (TCXO) provides small size and lowcost benefits tor low-to-moderate performance applications, but higher multiplication factors can degrade the noise floor significantly. Improved stability and phase noise performance can be achieved by using a 100 MHz oven-compensated crystal oscillator (OCXO), but at the cost of size and power consumption. It is worth noting that higher frequency OCXO (for example, 100 MHz instead of 10 MHz) can potentially result in a improved synthesizer jitter and phase noise performance.