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音频功率放大器是功率集成电路中比较重要的组成部分,已经广泛应用到各类电子产品中。虽然传统音频功率具有成本低等优点,但存在噪声干扰、输出管尺寸较大等问题。本文利用桥式连接实现了音频功率放大器的仿真设计。该音频放大器的主体由两个运算放大器组成,不仅保证了外部组件质量,提升了输出功率,不需要输出耦合电容、缓冲网络和自举电容。此种方式形成的电路仿真,完全符合电源抑制比、总谐波失真等指标要求,具有非常广阔的应用前景。
Audio power amplifier is more important part of power integrated circuits, has been widely used in various types of electronic products. Although the traditional audio power has the advantages of low cost, but there is noise interference, output pipe size and other issues. In this paper, the bridge connected to achieve the audio power amplifier simulation design. The main body of the audio amplifier consists of two operational amplifiers, not only to ensure the quality of external components, improve the output power, do not need output coupling capacitors, snubber network and bootstrap capacitors. The circuit simulation formed in this way fully complies with the requirements of power supply rejection ratio and total harmonic distortion, and has a very broad application prospect.