Title:
IMPEDANCE MATCHING METHOD AND APPARATUS FOR ELECTRET MICROPHONE, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/095597
Kind Code:
A1
Abstract:
Disclosed is an impedance matching method for an electret microphone. The method comprises: acquiring a bias voltage between a source and a drain of a field effect transistor built in an electret microphone; determining whether the bias voltage is within a preset bias voltage threshold; and if it is detected that the bias voltage is not within the preset bias voltage threshold, sending a corresponding control signal to adjust load bias impedance until the bias voltage is within the preset voltage threshold. Also disclosed are an impedance matching apparatus for an electret microphone and a communication device. The present invention improves the quality of a voice signal output by the MIC and improves the recording and call quality of the communication device.
Inventors:
ZHANG FENG (CN)
WANG WEI (CN)
WANG WEI (CN)
Application Number:
PCT/CN2015/091565
Publication Date:
June 23, 2016
Filing Date:
October 09, 2015
Export Citation:
Assignee:
ZTE CORP (CN)
International Classes:
H04R19/01
Foreign References:
| CN102932712A | 2013-02-13 | |||
| CN202889621U | 2013-04-17 | |||
| CN203942638U | 2014-11-12 | |||
| US20120275212A1 | 2012-11-01 | |||
| US20130201578A1 | 2013-08-08 |
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (CN)
北京安信方达知识产权代理有限公司 (CN)
北京安信方达知识产权代理有限公司 (CN)
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