Knobbe, Martens, Olson & Bear, LLP
Impedance matching method and apparatus for electret microphone, and communication device
An impedance matching method for an electret microphone is provided. In some embodiments, the impedance matching method includes collecting a bias voltage between a source and a drain of a field effect transistor built in the electret microphone; determining whether the bias voltage is within a preset bias voltage threshold range; and if it is detected that the bias voltage is not within the preset bias voltage threshold range, sending a corresponding control signal to adjust load bias impedance so that the bias voltage is within the preset voltage threshold. An impedance matching apparatus for an electret microphone and a communication device are also provided.
ZTE Corporation
H H H H H H G
H04R H04R H04R H04R H04R H04R G01H
additional additional inventional inventional inventional inventional inventional
Wei Feng
Wang Zhang