1、 1 低频功率放大器毕业设计论文 【摘要】实用低频功率放大器主要应用是对音频信号进行功率放大，本文介绍了具有弱信号 放大能力的低频功率放大器的基本原理、内容、技术路线。整个电路主要由稳压电源、前置 放大器、功率放大器、波形变换电路和保护电路共五部分构成。稳压电源主要是为前置放大 器、功率放大器提供稳定的直流电源。前置放大器主要是电压的放大。功率放大器实现电流、 电压的放大。波形变换电路是将正弦信号电压变换成规定要求的方波信号。设计的电路结构 简洁、实用，充分利用到了集成功放的优良性能。实验结果表明该功率放大器在带宽、失真 度、效率等方面具有较好的指标、较高的实用性,为功率放大器的设计提供了广阔
2、的思路 本设计的低频功率放大器同时还具有测量显示功率输出、电源供给功率和整机效率的功能。 本文首先对功率放大器的课题背景作简要的说明，随后对功率放大器的一些基础知识进行介 绍。最后，本文具体叙述实用低频功率放大器的安装与调试，并对电路在工作中易出现的失 真情况做了细致的分析。 关键字：前置放大； 功率放大； 稳压电源电路； 2 Low frequency power amplifier design graduate paper 【 abstract 】 practical low frequency power amplifier is mainly used for audio signa
3、l power amplifier, this paper introduces the weak signal amplifier ability has the low frequency power amplifier, the basic principle of content, the technical route. The main circuit by manostat, preamplifier, power amplifiers, wave transform circuit and the protection circuit of five parts. Manost
4、at primarily for pre-amplifier, power amplifier provide stable dc power. The preamplifier mainly is the voltage scaling. Power amplifier realize current, voltage scaling. Wave transform circuit is will sine signal voltage transform into the requirements of square wave signal. The design of the struc
5、ture is simple, practical circuit, make full use of the performance of the integrated amplifier. The experimental results show that the power amplifier in bandwidth, distortion degree, efficiency has good index, higher practicability, for power amplifier design offers wide thinking The design of the
6、 low frequency power amplifier and at the same time also has measurement shows power output, power supply power and the efficiency of the function. This paper first to power amplifier background of the topic be briefly and then some basic knowledge of power amplifier is introduced. Finally, this paper describes the low frequency power amplifier specific practical installation and commissioning, and in the work of circuit to occur during the
