文档介绍：河南工程学院毕业设计(论文)
低频功率放大器
学生姓名:
系(部): 电气信息工程系
专业: 电气自动化技术
指导教师:
2010年 6月10 日
摘要
低频功率放大器是目前普遍应用于音频放大上的一种放大器,本方案采用分立MOS管IRF640和IRF9640组成,分立元件功放的优点是可以对工作状态和性能进行逐级调整,具有通频带宽,负载能力强,高保真等优点。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。此外,相应的介绍低频功率放大器的各单元电路———前置放大、音调控制电路、音量控制电路和功率放大部分及功率测量的组成与工作原理,详细叙述了前置放大、功率测量电路部分。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。
关键词:
低频功率放大器功率输出音调控制电路音量控制电路
Abstract
Low-frequency power amplifier is widely used in the audio amplification on an amplifier, the program using discrete MOS tube IRF640 and ponent, discrete power amplifier has the advantage of the condition and performance can be adjusted step by step, with the pass-band bandwidth, load ability, fidelity and so on. The design of low-frequency power amplifier is also shown with measured power output, power supply, power and efficiency of the unit functions. This paper first a brief background of the subject PA instructions, followed by some basic knowledge of the power amplifier are described. In addition, the corresponding low-frequency power amplifiers introduce each unit --- preamplifier circuit, tone control circuit, the volume control circuit and power amplifier section and power measurement of position and working principle, detailed description of the preamplifier, power measurement circuit part . Finally, this paper describes the utility of specific low-frequency power amplifier installation missioning, and the circuit in the work situation, and so prone to distortion in the detailed analysis.
Key words:
 Low-frequency power Amplifier output Volume control, Tone control circuit circuit
 
 
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