An intuitive yet sufficiently accurate formulation of the phase noise of various commonly used oscillators, including most types of class-B (standard, AC-coupled and with tail filter) and class-C, is derived and used to compare their fundamental limitations. A noise factor that represents the difference between the maximum achievable Figure of Merit and the actual one is derived for all topologies considered. Measurements on a dedicated chip prototype that integrates two high performance topologies allow to verify, in an unbiased way, the accuracy of the predictions. A very good agreement between the model and both simulation and measurement is obtained.
An Intuitive Analysis of Phase Noise Fundamental Limits Suitable for Benchmarking LC Oscillators
GARAMPAZZI, MARCO;Antonio Liscidini;MANSTRETTA, DANILO;CASTELLO, RINALDO
2014-01-01
Abstract
An intuitive yet sufficiently accurate formulation of the phase noise of various commonly used oscillators, including most types of class-B (standard, AC-coupled and with tail filter) and class-C, is derived and used to compare their fundamental limitations. A noise factor that represents the difference between the maximum achievable Figure of Merit and the actual one is derived for all topologies considered. Measurements on a dedicated chip prototype that integrates two high performance topologies allow to verify, in an unbiased way, the accuracy of the predictions. A very good agreement between the model and both simulation and measurement is obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
