音频功率放大器的CMOS电路设计

CMOS Circuit Design of Audio Power Amplifier

完成了一种桥式连接音频功率放大器的仿真和设计。该音频功率放大器的主体为桥式连接的两个运算放大器,使用尽可能小的外部组件提供高质量的输出功率,不需要输出耦合电容、自举电容和缓冲网络。应用Cadence的Spectre模拟仿真工具进行电路仿真,得到其电路指标如频响特性、电源电压抑制比、总谐波失真等均达到要求。该音频功率放大器具有良好的市场应用前景。

The simulation and design of a bridge connecting audio power amplifier is completed. The main sections of audio power amplifier are two audio op-amps connected with a bridge. Least possible external components are used to provide high-quality output power without any output coupling capacitance, bootstrap capacitance and buffer network. The Cadence Spectre simulation tools are applied for circuit simulation,the circuit indexes such as power supply to voltage rejection ratio, frequency response characteristics and total harmonic distortion are up to the requirement. The audio power amplifier has a good application prospect in the market.