音频功率放大器设计毕业设计论文.doc

摘 要 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,它还在不断地更新、发展、前进。主要因为人类的听觉是各种感觉中的相当重要的一种,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地加以改进。 高效率的音频放大器不只是在便携式的设备中需要，在大功率的电子设备中也需要。因为，功率越大，效率也就越重要。而随着人们的居住条件的改善，高保真音响设备和更高挡的家庭影院也逐渐开始兴起。在这些设备中，往往需要几十瓦甚至几百瓦的音频功率。这时，低失真、高效率的音频放大器就成为其中的关键部件。D类放大器在这些设备中也扮演了极重要的角色。 ? 关键词 高效率，音频，功率放大 Abstract This system with high efficiency audio power amplifier as the core, output switch tube with a high VMOSFET tube, connected into complementary symmetry H bridge type structure, maximum output power greater than 1 not distortion W, average efficiency can reach 70%, with output 1:1 double change single circuit, single chip microcomputer power measurement show circuit. In addition to the output short circuit protection and instructions, output volume level instructions auxiliary functions, an ideal way to realize the requirement of design index. Audio amplifier has is a century of history, from the earliest tube amplifiers first application is audio amplifier. However, up to now, it will continue to update, development and progress. Mainly because of the human auditory is all sorts of feeling of quite important, also is the most basic one. In order to meet the need of it, the audio amplifier will be constantly improved. High efficiency of the audio amplifier not just in portable equipment need, in high power electronic equipment also need. Because, the greater the power, efficiency and also more important. But along with the improvement of peoples living conditions, high fidelity audio equipment and higher to block of home theater gradually began to rise. In these devices, often need dozens of tile or even hundreds of watts of audio power. At this time, low distortion, high efficiency of the audio amplifier will become one of the key components. D class in these devices amplifier also play an extremely important role. Key Words High efficiency, audio, power amplifier  目录 摘 要 I Abstract II 1引 言 1 1.1 音频放大器发展过程 1 1.2音频放大器的现状 1 1.3 音频放大器的设计意义 2 1.