半导体学报2006，Vol.27Issue(9)：1552-1556,5.
一种新型的超低THD,低功耗CMOS音频功率放大器
A New Structure for a CMOS Audio Power AMP with Extremely Low THD and Low Power Consumption
摘要
Abstract
A new system-corrected CMOS audio power AMP is presented. Consisting of four single-end OPAs, this structure is a pseudo-differential system. Compared to conventional CMOS power AMPs, it has the merits of low power consumption, extremely low THD, easy compensation, and good driving capability. With 1st silicon 0.2Sμm 1P4M CMOS technology and a 3V power supply, the output range can be 4Vpp when driving an 8Ω‖ 300pF load,while its power dissipation is less than 3mW. The THD is better than 0. 003% at 1kHz. A new over-current protection circuit, which can effectively protect the power output circuits on the chip, is also demonstrated.关键词
系统矫正结构/CMOS功率放大器/过流保护电路Key words
system-corrected structure/CMOS power AMP/over-current protection分类
信息技术与安全科学引用本文复制引用
曹政新,熊绍珍..一种新型的超低THD,低功耗CMOS音频功率放大器[J].半导体学报,2006,27(9):1552-1556,5.基金项目
国家自然科学基金资助项目(批准号:60437030)Project supported by the National Natural Science Foundation of China(No. 60437030) （批准号:60437030）
