文档介绍：一种高效D类音频功放的设计中文摘要一种高效D类音频功放的设计中文摘要音频功率放大器是功率集成电路的一个重要组成部分,广泛应用于消费类电子产品中。我国是全球最大的消费类电子商品市场,音频功放的需求日益增加,因此研究音频功率放大器具有重要意义。在众多功放中,D类音频功放的效率远高于模拟类功放的效率,通常能达N80% 以上。本文设计一种应用于便携式音频电子产品的D类功率放大器。首先比较了各类功率放大器并分析其优缺点,对D类功率放大器原理进行了详细的分析。在综合考虑电路功耗、效率、性能等方面因素的基础上,对每个模块的都进行了分析、设计和仿真,其中包括基准源、运算放大器、比较器、三角波振荡器、输出驱动电路等。并利用全桥输出结构提高了输出功率和效率。本文通过对各个模块的分析,在设计目标下优化了其参数,给出了基于Hspice 的仿真结果。 CMOS工艺仿真,结果表明所设计电路在电源为5V, 负载8欧姆条件下,,电源效率大于80%。所设计的D类音频功放完成功能,电路设计符合要求。关键词:D类功放;PWM调制;功率;效率作者:茅海峰指导教师:李富华 Abstract Akindofhigh efficient Dclass Akindofhigh efficient Dclassaudiopower amplifier design Abstract Audio power amplifier is ponent ofintegratedcircuits,widely used inconsumer istheworld’Slargest consumer electronicsmarket, increasing demand foraudio amplifier,audiopoweramplifier SOtheresearch isimportant. Among themany power amplifier,D audio power amplifier poweramplifier efficiency ismuch higher thantheefficiency ofsimulationclass,usually 80%or more. This design of aportable audio electronicproducts used inClass pares various types ofpoweramplifiers and analysis oftheiradvantages and disadvantages ofClass Dpower amplifier principle considering the circuitpower consumption,efficiency,performance and otherfactors,based on each module areanalyzed,design andsimulation,including references,operational amplifiers, comparators,triangular wave oscillatoroutput the use offull-bridge output structure tOimprove theoutputpower andefficiency. Based on theanalysis ofthe various modules inthedesignobjectives tOoptimize its parameters given based on Hspice simulation using -tm CMOS process,the results show thatthedesigned circuitin thepower of5V,8-ohm load conditions,theoutputpower ,the power efficiency greater than80%. The Class Daudioamplifier pletion,the circuitdesign tOmeettherequirements. Key words:class Dpower amplifier;PWM modulation;power;efficiency; Writt