降压式DC-DC电源管理芯片中振荡器电路的设计与研究  

Design and research of oscillator circuit in step-down DC-DC power management chip

作　　者：钟方媛 毛群 Zhong Fangyuan;Mao Qun(Aviation Engineering Institute,Civil Aviation Flight University,Guanghan 618307,China;College of Electronic Information and Automation,Aba Teachers University,Wenchuan 623002,China)

机构地区：[1]中国民用航空飞行学院航空工程学院,四川广汉618307 [2]阿坝师范学院电子信息与自动化学院,四川汶川623002

出　　处：《无线互联科技》2022年第4期61-63,共3页Wireless Internet Technology

基　　金：同步降压式DC-DC电源芯片设计,项目编号:201910050;项目名称:数字电子技术,项目编号:202004012。

摘　　要：文章为一款降压式DC-DC电源芯片提供一种高性能的振荡器电路以及斜坡发生器,并对其工作原理进行了分析。文章采用中芯国际0.18μm CMOS工艺,在Cadence软件下,利用specture电路仿真工具,对振荡器电路进行仿真。经过仿真验证,该电路振荡频率在3.3V,27℃的典型环境下,中心振荡频率为672.4 kHz,达到了预期指标,实现了电路功能。在温度-20℃~120℃的仿真条件下,振荡器的频率受温度影响非常小,性能稳定,频率偏移率为3.8%。This paper provides a high-performance oscillator circuit and ramp generator for a step-down DC-DC power supply chip and analyzes its operating principle.In this paper,we use SMIC 0.18 um CMOS process to simulate the oscillator circuit with specture circuit simulation tool under Cadence software.After simulation and verification,the circuit oscillates at a typical environment of 3.3 V and 27℃,the center oscillation frequency is 672.4 kHz,which achieves the expected index and realizes the circuit function.The frequency of the oscillator is very little affected by the temperature under the simulation conditions of-20℃~120℃,and the stable performance frequency shift rate is only 3.8%.

关 键 词：振荡器电路 降压式DC-DC 开关电源 CMOS工艺 

分 类 号：TN86[电子电信—信息与通信工程] TN752