DDS芯片AD9851及其在高速寻呼系统中的应用

DDS Chip AD9851 and Its Application in High Speed Calling System

提出了一种在高速寻呼发射机中采用DDS芯片和PPL相结合的频率合成方案。介绍了美国AD公司的DDS芯片AD9851的主要特性及工作原理,给出了以AD9851作为参考信号源的锁相环频率合成器的设计方案及主要测试数据。

A scheme of frequency synthesizer with DDS chip and PPL in high speed calling transmitter is put forward. Main characteristics and working principle of the DDS Chip AD9851 of AD Company in U.S.A are introduced. The design scheme and main test data of phaselocked loop frequency synthesizer of reference signal resources with AD9851 are supplied.