Rigorous Q-factor formulation for one- and two-port passive linear networks from an oscillator noise spectrum viewpoint

  • Takashi Ohira
  • Published 2005 in IEEE Trans. on Circuits and Systems

Abstract

This brief characterizes oneand two-port passive networks from the viewpoint of oscillator design. A linear circuit theory derives the spectral spread due to RF noise from active devices. The formulation finds a frequency derivative function of logarithmic immittance that plays the key role of dominating the spectrum behavior. This leads to an explicit definition of the factor by referring to Leeson’s basic oscillator model. The derived definition can provide an effective criterion for circuit topology and parameter optimization in low-noise oscillator design.

DOI: 10.1109/TCSII.2005.853343

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Cite this paper

@article{Ohira2005RigorousQF, title={Rigorous Q-factor formulation for one- and two-port passive linear networks from an oscillator noise spectrum viewpoint}, author={Takashi Ohira}, journal={IEEE Trans. on Circuits and Systems}, year={2005}, volume={52-II}, pages={846-850} }