二低通滤波器的音频过滤器的应用

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For some time now portable electronic devices that have some sort of audio function have needed some type of Electro Static Discharge (ESD) protection. These ESD protection devices would be used to protect the audio input/output jacks and sometimes be located at the speakers or microphone in the portable device itself. These ESD protection devices provided nothing more than basic ESD protection from ESD that the device could expect from
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