低频功率放大器的设计与实现  

Design and Accomplishment of Low Frequency Power Amplifier

作　　者：丁丁[1] 丁炜[1] 

机构地区：[1]兰州石化职业技术学院电子电气工程系,甘肃兰州730060

出　　处：《兰州石化职业技术学院学报》2010年第4期17-19,共3页Journal of Lanzhou Petrochemical Polytechnic

基　　金：甘肃省重大科研基金(甘经技【2008】267号);兰州石化职业技术学院科研基金(k09-08)

摘　　要：论述了基于AT89C51单片机的低频功率放大器的设计与实现。采用电压放大电路、功率放大电路和稳压电源电路构成功率放大器的主体,配以高精度采样电阻及12位A/D转换器,实现了通频带30Hz～50kHz范围内的低频放大,保证了失真度小于1.2%,具有较高的精度与稳定性。实验结果表明电路功能和性能指标均已达到设计要求。This paper presents a discussion on AT89C51 SCM design and accomplishment of low frequency power amplifier.The main body is composed of voltage amplifier circuit,power amplifier and preamplifier.Matched with high-accuracy sampling electric resistance and 12 A/D converters,the low frequency amplifier on the range of 30Hz^50 KHz has been accomplished,making sure that the distortion factor is smaller than 1.2%,with higher accuracy and stability.According to the simulation results,the function and performance of the whole circuit can meet all the requirements.

关 键 词：低频功率放大器 电压放大电路 带阻滤波器 

分 类 号：TN722[电子电信—电路与系统]