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一、引言频率合成器是一种高质量信号发生器,故可用来测量信号源的频率和相位,可用来做发射机的激励器和接收机的本地振荡器,也可用在频率和时间标准上。因此要求频率合成器有很高的频率稳定度或频谱纯度,而且这种要求会随着科学技术的发展而越来越严格。如何较
I. INTRODUCTION The frequency synthesizer is a kind of high-quality signal generator, so it can be used to measure the frequency and phase of the signal source. It can be used as the local oscillator of the transmitter’s exciter and receiver. It can also be used on the frequency and time standard . Therefore, frequency synthesizer is required to have high frequency stability or spectral purity, and this requirement will be more and more strict with the development of science and technology. How to compare