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TPA3111D1白噪声

Other Parts Discussed in Thread: TPA3111D1

   我使用TPA3111D1设计了一个放大器。该放大器输出接扬声器后,输入端接地扬声器有噪音,像是白噪声。TPA3111D1资料里没有白噪声的性能介绍。怎么减小或消除白噪声呢?
  谢谢