Title :
Optimization of tunable oscillators with AM to FM conversion for near-carrier phase noise
Author :
Klimovitch, Gleb V.
Author_Institution :
Watkins-Johnson Co., Palo Alto, CA, USA
Abstract :
Nonlinearity in the resonating tank of an oscillator results in conversion of amplitude fluctuations into frequency fluctuations. The effect of this AM to FM (AM2FM) transformation on phase noise is especially important in high-Q oscillators with a wide tuning range. The author develops a quantitative time-variant model of near-carrier phase noise incorporating AM2FM conversion, which is both mathematically rigorous and intuitive, and propose new techniques to reduce AM2FM-induced noise in tunable oscillators
Keywords :
circuit noise; circuit optimisation; circuit tuning; fluctuations; nonlinear network analysis; phase noise; variable-frequency oscillators; AM to FM conversion; amplitude fluctuations; frequency fluctuations; high-Q oscillators; near-carrier phase noise; oscillator optimization; resonating tank nonlinearity; time-variant model; tunable oscillators; wide tuning range; Admittance; Capacitance; Circuit noise; Fluctuations; Frequency conversion; Oscillators; Phase noise; Resonance; Tuning; Voltage;
Conference_Titel :
Radio and Wireless Conference, 2000. RAWCON 2000. 2000 IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-6267-5
DOI :
10.1109/RAWCON.2000.881891
