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:
Jun. 07, 2016
Filed:
Jul. 10, 2013
Applicants:
Chi Wah Lo, Hong Kong, HK;
Hwai Sian Tsai, Hong Kong, HK;
Ka Leong Tony Tsang, Hong Kong, HK;
Inventors:
Assignee:
BBPOS LIMITED, Hong Kong, HK;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 9/06 (2006.01); H01R 13/703 (2006.01); H04R 5/04 (2006.01); H04R 1/10 (2006.01); H01R 24/58 (2011.01); H01R 107/00 (2006.01);
U.S. Cl.
CPC ...
H01R 13/703 (2013.01); H04R 5/04 (2013.01); H01R 24/58 (2013.01); H01R 2107/00 (2013.01); H04R 2420/05 (2013.01); H04R 2420/09 (2013.01);
Abstract
A circuit for detecting the position of the signal MIC-IN and GND on the audio plug of a mobile phone includes two comparators and two switches. The comparators compare the voltage difference between the two contact points representing MIC-IN and GND of the audio plug of a mobile phone, and through this comparison the ground signal of the mobile phone is identified. The circuit then connects the ground of the accessory and the mobile phone properly, by activating the appropriate switch.