PHASE NOISE CHARACTERIZATION OF SAW OSCILLATORS BASED ON A NEWTON MINIMIZATION PROCEDURE

被引:0
作者
KLEMER, DP [1 ]
SHIH, KM [1 ]
CLARK, EE [1 ]
机构
[1] RF MONOLITH INC,DEPT FREQUENCY SOURCES,DALLAS,TX 75244
基金
美国国家科学基金会;
关键词
D O I
10.1109/22.79117
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
An iterative minimization technique is used to optimize the values of circuit and device parameters which determine the phase noise response of a voltage-controlled SAW-stabilized oscillator (VSCO). An expression developed by Parker is used to calculate the double-sideband phase noise to carrier ratio from circuit parameter values; good agreement between calculations and phase noise measurements is achieved by minimizing the squared error through the use of a steepest-descent/Newton-Raphson minimization scheme. Less accurately known circuit parameters are thus optimized in an iterative fashion. Exact expressions for the elements of the Hessian matrix are used in the Newton-Raphson procedure, allowing for fast computations. Although this technique is primarily useful in the determination of circuit parameter values, it can also be used to develop an understanding of the effect of individual parameters on phase noise response (i.e., the sensitivity of phase noise characteristics to circuit and device parameter variations). Additionally it may be of use in the design of low-phase-noise oscillators by using desired (rather than measured) phase noise values in the objective function to be minimized.
引用
收藏
页码:883 / 889
页数:7
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