【摘要】 为解决数字锁相环的噪声分析及最佳参数选择问题，本文从理论上对数字锁相环输出相位噪声方差进行了分析，并在锁相环输出相位噪声方差最小的最佳准则下证明其最佳参数选择为ξ＝１．从而为数字锁相环的设计与调整提供了可靠的理论根据。更多还原

【Abstract】 To solve the problem of noise analysis and optimum parameter-selection in nu-merieal phase-locked loop,this article analyses the otitput phase noise variance of the numerical phase-locked loop theoritically,and prove that under the mini-mal selective rule of the output phase noise variance the optimum parameter-selection is ξ=1.Thus it sets up a theoritical grounds for design and regulation of the digital phaselocked loop。更多还原