直接数字式频率合成技术是当今电信领域与电子仪器领域一个引人入胜的课题,尤其是采用了VLSI工艺和某些先进技术的直接数字式频率合成系统(DDS)芯片,更使频率合成器的研制者们如虎添翼。本文介绍的 Q2220 DDS芯片,是美国 QUALCOMM公司近几年推出的该类产品之一,本文介绍其特点、用途、工作原理和应用方法,最后给出设计实例和有关结论。 Direct digital frequency synthesis technology is a fascinating subject in the field of telecommunications and electronic devices today, especially the direct digital frequency synthesis system (DDS) chip that uses the VLSI process and some advanced technologies, and moreover, the developers of frequency synthesizers They are even more powerful. This article describes the Q2220 DDS chip, the United States QUALCOMM company launched in recent years, one of such products, this article describes its characteristics, purpose, working principle and application method, and finally gives the design examples and conclusions.