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一、前言随着科学技术的发展,频率综合器的用途越来越广泛,而且指标要求越来越苛刻。对于调相制的机器,要求综合器的相位噪声要小,频谱要纯净。下面就我们在研制数字式综合器的一些体会叙述如下,如有不妥之处,望批评指导。二、单环合成器中各部件的噪声与环路参数的关系要想得到一个输出信号很纯净的综合器,首先必须了解环路中产生噪声的根源在什么地
I. Introduction With the development of science and technology, the use of frequency synthesizer is more and more extensive, and the requirements of the index are more and more harsh. For phase modulation of the machine, the synthesizer requires phase noise is small, pure spectrum. Here we are in the development of some of the experience of digital synthesizer described below, if there is anything wrong, hope to criticize the guidance. Second, the single-loop synthesizer noise and the relationship between the loop parameters To get a pure synthesizer output signal, we must first understand the source of noise in the loop where