一种BTL低静态功耗CMOS音频功率放大器的设计  

BTL CMOS Audio Power Amplifier with Low Static Power Consumption

作　　者：汪少康[1] 吴金[1] 吴毅强[1] 刘凡[1] 

机构地区：[1]东南大学集成电路学院,南京210096

出　　处：《电子器件》2008年第2期472-475,共4页Chinese Journal of Electron Devices

摘　　要：对AB类CMOS音频功率放大系统中的核心运放单元电路结构,即基于共漏与共源并联组合的功率级放大电路进行了改进与优化设计。基于CSMC0.6μmCMOS工艺的仿真结果表明,在5V电源电压下,静态电流仅为1.59mA。BTL模式驱动4Ω的负载,当1kHz频率点的总谐波失真小于0.1%时,获得的最大输出功率可以达到2W,电源转换效率为60.7%。A CMOS Class AB power amplifier in the CSMC 0.6 μm technology for portable audio players is presented. The output power stage that combines common-drain with common-source configuration has been improved. The simulated result has shown that its static current is 1.59 mA with a 5 V power supply. When driving an 4 Ω load under Bridge-Tied-Load mode, the maximum output power can be 2 W, while the THD is better than 0. 1 % for 1 kHz. Efficiency reaches 60. 7%.

关 键 词：CMOS 音频功放 AB类 共漏共源 BTL 

分 类 号：TN722[电子电信—电路与系统]