音频功放环路频率响应的测试

Measurement of Audio Power Amplifier Loop Frequency Response

音频功放的稳定性是由环路频率响应的增益与相位曲线决定的。在设计时可以通过仿真软件分析,在实际测试时由于测试误差和动态范围的限制很难得到准确的结果。本文以AB类音频功放为例,介绍了一种采用网络分析仪的增益和相位端口,测试环路频率响应的方法。

Audio power analyzed by simulation amplifier stability is software in the stage decided by the gain and phase loop frequency response. of design, it is difficult to get accurate results with It can be the limit of measurement error and dynamic range. Take Class-AB audio power amplifier for granted, we introduce a method to measure loop frequency response with the gain and phase port of network analyzer