Title :
Nonlinear analysis of high Q oscillator phase noise
Author_Institution :
Silicon Valley Eng., Santa Clara, CA, USA
fDate :
31 May-2 Jun 1989
Abstract :
The effects of circuit noise on the high-Q oscillator were analyzed using a nonmeasurable function with nonmeasurable parameters. These parameters were eliminated, yielding a practical solution. This results acts like Leeson´s equation and reduces to it for the linear case. Noise effects are exacerbated by the interaction of the crystal and the circuit nonlinearities. The noise amplifier model proposed by various authors is shown to apply for almost linear circuits. Examples of diode-limited and AGC-limited oscillators are given. It is shown that for both oscillators, the main effects are near W0. SPICE was used to calculate coefficients for the diode-limited case
Keywords :
Q-factor; circuit analysis computing; crystal resonators; nonlinear network analysis; oscillators; random noise; AGC-limited oscillators; Leeson´s equation; SPICE; circuit noise; circuit nonlinearities; crystal; diode-limited case; high Q oscillator; noise amplifier model; phase noise; Additive noise; Circuit noise; Circuit simulation; Differential equations; Frequency; Noise figure; Nonlinear equations; Oscillators; Phase noise; RLC circuits;
Conference_Titel :
Frequency Control, 1989., Proceedings of the 43rd Annual Symposium on
Conference_Location :
Denver, CO
DOI :
10.1109/FREQ.1989.68837
