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. 11, 2011
Filed:
Mar. 27, 2009
Applicants:
Mayo Kitano, Kasugai, JP;
Masatoshi Kokubun, Kasugai, JP;
Takashi Matsumoto, Kasugai, JP;
Inventors:
Assignee:
Fujitsu Semiconductor Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/563 (2006.01); H02M 3/335 (2006.01);
U.S. Cl.
CPC ...
Abstract
A voltage control method includes producing an error signal based on a difference between a reference signal and an adaptor voltage and an adaptor current corresponding to the adaptor voltage, regulating, based on the error signal, the adaptor voltage, comparing a reference voltage to a voltage proportional to a potential corresponding to an identifying voltage corresponding to the adaptor voltage, detecting, based on the comparison result, whether or not a couplable external power source is suitable, and setting based, on the detection result, a potential corresponding to the identifying voltage.