The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2017
Filed:
Aug. 21, 2014
Yamaha Corporation, Hamamatsu-shi, Shizuoka, JP;
Akihiko Toda, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
A plug connector includes: a jack portion into which a pin of a microphone-equipped headphone plug in which a speaker contact portion connected to a speaker of a headphone, a ground contact portion connected to a ground wire of the headphone, and a microphone contact portion connected to a microphone of the headphone are sequentially formed in an axial direction, the jack portion having a first contact which is in contact with the speaker contact portion, a second contact which is in contact with the ground contact portion, and a third contact which is in contact with the microphone contact portion; a bias circuit configured to supply a bias voltage to the third contact through a resistor; and a control circuit configured to detect that the pin is extracted from the jack portion, based on a change of a potential of the third contact.