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高保真音频功率放大器设计
High fidelity audio power amplifier design
学 院（系）： 电子信息与电气信息学部 专 业： 电气信息类 学 生 姓 名： 赵志军 学 号： 201181384 指 导 教 师： 评 阅 教 师： 完 成 日 期：
大连理工大学
Dalian University of Technolog
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摘 要
论文主要介绍利用优秀的集成芯片TDA2930、LM324设计高保真音频功率放大器的模拟实现过程，并讨论功率放大器的基本原理。通过PROTEL软件的电路仿真实验的分析和调试，并且得出较为理想的性能表现。
本设计主要由电源部分、前级放大单元、音调调节级、音量调节级、功率放大级、负载六部分组成。它的作用主要是放大音频信号。为了保证功放效果，电路采用TDA2030作为功放IC，因为它具有失真小、功率大、外围元件少、开机冲击极小、内含各种保护电路、保真度高等优点，所以用它来做电脑有源音箱的功率放大部分或MP4等小型功放再合适不过，此实验很有实际价值。。且采用LM324做运算放大器。
功放，可以说是各类音响器材中最大的一个家族了，其作用主要是将音源器材输入的较微弱信号进行放大后，产生足够大的电流去推动扬声器进行声音的重放是音频功率放大器的主要部分。
关键词： 高保真；放大器 ；运放; 功放 ;PROTEL;PCB ;LM324 ;TDA2030
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High fidelity audio power amplifier design
Abstract
Paper mainly introduces the use of excellent integrated chips TDA2930, LM324 design high-fidelity audio power amplifier simulation of the implementation process, and discuss the basic principle of power amplifier. Through the simulation software PROTEL circuit analysis and commissioning, and believes that the ideal performance.
This design mainly by power supply part, former amplifier unit, tone adjustment level, volume control, power amplifier grade level, load six parts. It is the main roles of the amplifier audio signal. In order to ensure power amplifier effect, the power amplifier circuit TDA2030 as IC, because it has the distortion is small, big power, peripheral components, less impact on very little, containing various kinds of protection circuit, the advantages of high fidelity, so use it to do computer active sound box power amplifier part or the MP4 and other small power amplifier is again appropriate but. And the LM324 do operational amplifier.
Power amplifier, can say is the biggest of all kinds of audio equipment of a family, and its function mainly is the audio source equipment input a weak signal after amplification, generate enough current to drive a speaker for the replay of voice. Is the main part of the audio power amplifier.
Key Words：High fidelity; Amplifier; Op-amp; Power amplifier; PROTEL; PCB; LM324; TDA2030
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目 录
摘 要 ................................................................................................................................... II Abstract .................................................................................................................................... III 1 绪论 ......................................................................................................................................... I
1.1 .................................................................................................................................. - 1 - 1.2 .................................................................................................................................. - 1 - 1.3 .................................................................................................................................. - 1 - ………… ....................................................................................................................... - 1 - 2 EDA工具软件 ................................................................................................................... - 2 -
2.1 .................................................................................................................................. - 2 -
2.1.1 ....................................................................................................................... - 2 - 2.1.2 ....................................................................................................................... - 2 -
…… .......................................................................................... 错误！未定义书签。 2.2 .................................................................................................................................. - 2 -
2.2.1 ....................................................................................................................... - 2 - 2.2.2 ....................................................................................................................... - 3 - …… ....................................................................................................................... - 4 - …… .................................................................................................. 错误！未定义书签。 3 Protel .................................................................................................................................. - 5 -
3.1 概述 ........................................................................................................................ - 5 -
3.1.1 ....................................................................................................................... - 5 - 3.1.2 .......................................................................................... 错误！未定义书签。 3.2 原理图绘制 ............................................................................................................ - 6 -
3.2.1 ....................................................................................................................... - 6 - 3.2.2 ....................................................................................................................... - 6 - 3.3 PCB图绘制 ............................................................................................................ - 7 - 3.4 封装库制作 ............................................................................... 错误！未定义书签。 4 高保真音频功率放大器原理 ......................................................................................... - 11 -
4.1 设计指标 .............................................................................................................. - 11 - 4.2 系统框图 .............................................................................................................. - 11 - 4.3 原理图 .................................................................................................................. - 12 - 4.4 高保真音频功率放大器原理 .............................................................................. - 12 -
4.4.1 运算放大器与基本放大电路 ................................................................... - 12 - 4.4.2 集成运算放大器LM324 .......................................................................... - 13 -
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4.4.3 功率放大器TDA2030 .............................................................................. - 15 - 4.4.4 各模块功能与参数设计 ........................................................................... - 15 -
结 论 ............................................................................................................................. - 17 - 参 考 文 献 ....................................................................................................................... - 18 - 附录 ..................................................................................................................................... - 19 -
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