高效音频功率放大器毕业论文(设计) 下载本文

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毕 业 论 文(设 计)

题 目 高效音频功率放大器 英文题目

High perormance aduio power amplifier

院 系

专 业 姓 名 年 级 指导教师

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摘 要

在音频领域发展的几十年里,A类,B类,AB类音频功率放大器一直占着主导地位,随着科技的不断发展,音频功率放大器也有了新的研究成果—D类功率放大器。D类功率放大器有很多优点,因为低功耗产生热量较少,节省印制电路板(PCB)面积和成本,并且能够延长便携式系统的电池寿命。D类放大器,是通过控制开关单元的ON/OFF,驱动扬声器的放大器。D类放大器是最近几年才发展起来的,在系统的耐用上以及音频质量等都有了很大的提高。

关键词:D类功率放大器、TDA8922TH、PWM调制、电压开关型驱动电路

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The Format Criterion of Master’s Degree Paper of DUT

Abstract

In the audio field for decades, A Class, B Class, AB audio power amplifier has occupied the leading position, with the technology continuous development of the audio power amplifier also has a new research-D power amplifier. Class D power amplifier has many advantages, because the low-power generating less heat, saving printed circuit board (PCB) area and cost, and can extend battery life in portable systems. Class D amplifier, through the control switch unit ON / OFF, the amplifier drives the speaker. Class D amplifier is only developed in recent years, the durability of the system and so on and the audio quality has been greatly improved.

Key words: D power amplifier, TDA8922TH, PWM modulation, the voltage

switching drive circuit

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