Higher-Order Analysis on Phase Noise Generation in Varactor-Tuned Oscillators-- Baseband Noise Upconversion in GaAs MESFET Oscillators--

Takashi OHIRA  

IEICE TRANSACTIONS on Electronics   Vol.E76-C    No.12    pp.1851-1854
Publication Date: 1993/12/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwave and Millimeter Wave Technology
microwave,  oscillator,  phase noise,  varactor,  perturbation,  

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Phase noise generation in varactor-tuned oscillators is analyzed by an asymptotic perturbation technique. It is found out that 1/f noise and AM noise are converted into phase noise by first- and higher-order nonlinearities of the varactor. The deduced formula can be utilized in CAD for circuit evaluation/optimization of varactor-tuned osicillators.