%0 Journal Article
%T A Low Noise High efficiency buck DC-DC converter with sigma-delta modulation<br>一种基于sigma-delta调制的高效率低噪声降压式直流变换器
%A Cai Shujiang
%A Pi Changming
%A Yan Wei
%A Li Wenhong
%A <br>蔡曙江
%A 皮常明
%A 严伟
%A 李文宏
%J 半导体学报
%D 2011
%I 
%X Some research efforts on improving efficiency and noise performance of buck DC-DC converter are explored in this paper. A carefully-designed power MOSFET driver, including dead time controller, discontinuous current mode(DCM) controller and gate width controller, is proposed to improve efficiency. Instead of PWM modulation, sigma-delta modulation is introduced into the feedback loop of the converter to move out clock-referred harmonic spike. The proposed converter has been designed and fabricated on a 0.35um CMOS process. Measured results show that the peak efficiency of the converter can reach 93% and sigma-delta modulation suppresses harmonic spike by 30dB over PWM modulation.
%K buck DC-DC converter
%K PWM modulation
%K sigma-delta modulation
%K discontinuous current mode
%K dead time control
%K width control
%K current sensing<br>降压式直流变换器
%K PWM调制
%K Sigma-delta调制
%K 断流模式
%K 死区时间控制
%K 栅宽调制
%K 电流采样
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=025C8057C4D37C4BA0041DC7DE7C758F&aid=B70A235664D163BA18CC402E9C057C27&yid=9377ED8094509821&vid=9971A5E270697F23&iid=DF92D298D3FF1E6E&sid=985A2658B048ECC7&eid=5D311CA918CA9A03&journal_id=1674-4926&journal_name=半导体学报&referenced_num=0&reference_num=0