锁相技术在音响电路测试中的应用

Application of PLL in the Audio Circuit Test

在测试音响电路的解调功能时,用点频方式代替扫频方式输入已调制信号,可以有效地提高测试时间,从而降低测试成本。该文介绍利用锁相技术实现音响电路的点频测试方法。

In testing circuit audio demodulation functions, with points of replacing swept frequency modulation signal input methods can be effective in saving test time, thereby reducing the cost of test. The paper introduces the method of using PLL circuit technology to point test audio frequency circuits.