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论文编号:ZD1479 论文字数:15640 |
相关论文:[课程设计]音响放大器的设计 基于单片机的音响控制系统的设计 D类音频功率放大器音响的设计制作
摘 要
在现代音响普及中,人们因生活层次、文化习俗、音乐修养、欣赏口味的不同,对相同电气指标的音响设备得出不同的评价。所以,就高效率音频功率放大器而言,应该达到电气指标与实际听音指标的平衡与统一。
音频放大器已经有快要一个世纪的历史了,从最早的电子管放大器的第一个应用就是音频放大器。然而直到现在为止,它还在不断的更新、发展、前进。主要因为人类的听觉是各种感觉中的相当重要一种,也是最基本的一种。为了满足它的需要,有关的音频放大器就要不断的加以改进。
进入21世纪以后,各种携带型的电子设备成为了电子设备的一种重要的发展趋势。从作为通讯工具的手机,到作为音乐设备的MP3播放机,已经成为差不多人人具备的携带型电子设备。陆续将要普及的还有携带型电视机、携带型DVD,等等。所有这些携带型电子设备的一个共同点就是都有音频输出,也就是都需要有一个音频放大器;另一个特点就是它们都是电池供电的,都希望能够有较长的使用寿命。就是在这种需求的背景下,D类放大器被开发出来了,它的最大特点就是它能够在保持最低的失真情况下得到最高的效率。
高频功率放大器是音响放大器设备的重要组成部分。它的主要任务是放大高频信号使其达到足够的功率,以满足天线辐射的需要或技术指标要求。
高频功率放大器的主要技术指标有输出功率、效率、功率增益、带宽和谐波抑制等。由于发射机的输出功率和效率主要取决于高频功率放大器,对同一发射机来说,效率的提高意味着输出功率的增大,当输出功率一定时,效率的提高使消耗的电源功率减小,管子的耗散功率降低。这对于节省能源、使用较小的功率管输出较大的功率、减小没备的体积和重量都有颇大的实际意义。因此,提高功率放大器的效率一直是人们关注的重要课题,它推动了功率放大技术的不断发展。
关键字:音响放大器 混声器 功放器 话筒放大控制器
Abstract
In the modern popularization of sound,People''s level of living, cultural practices, music, accomplishment and appreciate the different tastes,On the same electrical specifications of the audio equipment arrive at different evaluations。So, high-efficiency audio power amplifier, it should be listening to electrical targets and actual indicators of balance and unity。
Audio amplifier has a history of about a century,Audio amplifier has a history of about a century。However, until now,It is continuously updated,Development, and advance。Mainly because the human auditory sense of the importance of various kind of,Is also the most basic kind of 。In order to meet its needs ,The audio amplifier must be improved continuously 。
Into the 21st century ,A variety of portable electronic equipment, electronic devices has become an important trend 。From the cell phone as a communications tool ,To the device as a MP3 music player ,Has become available in almost all portable electronic devices 。There will be one after another popular portable TV,Portable DVD , etc 。All of these portable electronic devices, a common denominator is that all audio output ,That is, needs to have an audio amplifier ;Another feature is that they are battery-powered ,All wish to have a longer life 。It is in this context of demand ,Class D amplifiers have been developed out of,Its greatest feature is that it can maintain a minimum of distortion case of the highest efficiency 。
High-frequency amplifier audio power amplifier is an important component of the device 。Its main task is to enlarge high-frequency signals to reach the sufficient power ,In order to meet the needs of the antenna radiation or technical requirements 。
The main technical indicators of high-frequency power amplifier with output power of ,efficiency ,power gain ,Bandwidth and harmonic suppression, etc. 。As the transmitter output power and efficiency depends primarily on high-frequency power amplifier ,For the same transmitter,Efficiency means that the output power increases , constant, increased efficiency to reduce power consumption of the power ,Tubes to reduce power dissipation 。This is to save energy, the use of smaller power transistor output of large power ,Did not reduce the size and weight are prepared by considerable practical significance ,Therefore, improving the efficiency of power amplifiers has always been an important subject of attention, it promoted the continuous development of power amplifier technology 。
key word :acoustics amplifier , sound mixer ,power amplifier , mike blowup control
目 录
1 绪论 1
1.1课题研究的目的和意义 1
1.2 目前国内外的研究现状 1
1.3 音响放大器的组成及元件功能介绍 1
1.4 设计要求与功能 2
1.5 设计结构 2
2 音调控制器的设计 3
2.1 音调控制电路的设计 3
2.2 音调控制器曲线分析及电路 7
2.3音调控制器的低频电路分析 7
2.4音调控制器的高频电路分析 9
3 功率放大器的设计 11
3.1功率放大器的分类及区别 11
3.1.1 功率放大器的分类 11
3.1.2 放大器各类各自区别 12
3.2 集成运放与晶体管组成的功率放大器 14
3.3 功率放大器电路工作原理 15
3.4 静态工作点设置 16
4 音响放大器主要技术指标及测试方法 17
4.1 音响放大器的主要技术指标与测试方法 17
5 电路安装与调试技术 19
5.1 合理布局,分级装调 19
5.2 调试技术 19
5.2.1 电路调试 19
5.2.2 话放级的调试 19
5.2.3 混合前置放大级的调试 20
5.2.4 功放级的调试 20
5.2.5 整机功能试听 20
6 总 结 21
致 谢 22
附录 24