Title:
FM EARPHONE JACK CIRCUIT, AUDIO TERMINAL AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/166271
Kind Code:
A1
Abstract:
A frequency modulation (FM) earphone jack circuit, an audio terminal and a control method therefor, comprising: connecting an FM signal processing circuit to an earphone interface circuit and an audio codec, introducing an FM signal by means of the earphone interface circuit when the earphone interface circuit is connected to an external earphone, and sending same to the audio codec; the audio codec transmitting, by means of the earphone interface circuit connected thereto, the processed audio signal to the external earphone connected to the earphone interface circuit for playing; an FM circuit and an impedance matching circuit that is connected to the FM circuit in parallel also being connected to the earphone interface circuit, a controller controlling, according to the current operating state of the FM earphone jack circuit, the connection or disconnection between the impedance matching circuit and the FM circuit.
Inventors:
SUN YINCHUAN (CN)
LIU BIN (CN)
LIU BO (CN)
GAO JING (CN)
LIU BIN (CN)
LIU BO (CN)
GAO JING (CN)
Application Number:
PCT/CN2017/119366
Publication Date:
September 20, 2018
Filing Date:
December 28, 2017
Export Citation:
Assignee:
ZTE CORP (CN)
International Classes:
H04R1/10
Foreign References:
| CN101917201A | 2010-12-15 | |||
| CN104683903A | 2015-06-03 | |||
| CN104333830A | 2015-02-04 | |||
| CN101316111A | 2008-12-03 | |||
| US20120121102A1 | 2012-05-17 | |||
| US20120171976A1 | 2012-07-05 |
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (CN)
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