基于SEPP的音频功率放大器的研究  

Research on audio power amplifier based on SEPP

作　　者：张正苏[1] 盛程潜[1] 徐泽清[1] 

机构地区：[1]黑龙江工程学院电子工程系,黑龙江哈尔滨150050

出　　处：《黑龙江工程学院学报》2011年第2期62-65,共4页Journal of Heilongjiang Institute of Technology

摘　　要：介绍基于SEPP的音频功率放大器的工作原理,分析音频功率放大器电路中输出晶体三极管的激励方式,提出电流反馈型功率放大器的设计方法,采用共模抑制电路及互补对称的两套闭环电流输出控制系统。实验结果表明,该设计方法达到了功率放大器大功率、低失真、宽频响的性能指标要求,优点是调整方便,偏置电压稳定性高,不需要静噪。Presents the principle of audio power amplifier based on SEPP;analyses the way of determining the crystal triode from audio power amplifiers integrated circuits;supposes the design method of current feedback amplifier and adopts the common mode rejection ratio circuit and the two sets of closed-loop circuit output control system.The results show that this design has reached the index request of the power amplifier under high power,low distortion and wide frequency response.Conclusively,the advantage of this circuit is its convenient adjustment,high stability of bias voltage and no need of noise squelch.

关 键 词：SEPP 电流反馈 运算放大器 功率放大器 闭环电流控制 

分 类 号：TN722.1[电子电信—电路与系统]