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:
Oct. 17, 2017
Filed:
Jul. 22, 2014
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Sung-Han Wen, Taipei, TW;
Po-Yi Lee, New Taipei, TW;
Assignee:
MediaTek Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/10 (2006.01); H04R 3/00 (2006.01); H04R 29/00 (2006.01); H04R 5/04 (2006.01);
U.S. Cl.
CPC ...
H04R 1/1041 (2013.01); H04R 3/007 (2013.01); H04R 29/001 (2013.01); H04R 5/04 (2013.01);
Abstract
An electronic device includes an impedance detection circuit and a processor. The impedance detection circuit is configured for receiving a test signal, processing the test signal and detecting an impedance of a headphone speaker load by using the test signal to generate a detection result. The processor is coupled to the impedance detection circuit and configured for providing the test signal to the impedance detection circuit, receiving the detection result from the impedance detection circuit, and adjusting a voltage of an audio signal to be provided to the headphone speaker load according to the detection result.