【摘要】 频率合成器是现代通信设备的重要组成部分。首先介绍频率合成技术，然后分析了倍频式ＤＤＳ激励ＰＬＬ频率合成器的噪声性能，最后讨论设计中应注意的问题更多还原

【Abstract】 Frequency synthesizer is an important part of a communication equipment.Firstly ,the technique for frequency synthesis is presented in this paper, and then the noise performance of the PLL frequency synthesizer driven by multiple frequency DDS is analysed.Finally,the issues which should be noted in the designing is discussed.更多还原