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:
Dec. 01, 2015
Filed:
Feb. 27, 2014
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Yasufumi Sakai, Fuchu, JP;
Eiji Yoshida, Yokohama, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 11/12 (2006.01); H04B 1/04 (2006.01); H03F 1/02 (2006.01); H03F 3/189 (2006.01); H02M 3/156 (2006.01); H02M 1/00 (2007.01); H04B 1/16 (2006.01);
U.S. Cl.
CPC ...
H03F 1/02 (2013.01); H02M 3/156 (2013.01); H03F 3/189 (2013.01); H02M 2001/0032 (2013.01); H02M 2001/0045 (2013.01); H02M 2001/0093 (2013.01); H03F 2200/432 (2013.01); H04B 1/1607 (2013.01); Y02B 70/16 (2013.01);
Abstract
A power supply circuit includes: a direct current to direct current converter; a linear amplifier; and a first capacitance, one terminal of the first capacitance being coupled an output of the linear amplifier, another terminal of the first capacitance being coupled to an output terminal, wherein the linear amplifier configured to operate in a variable voltage mode and the linear amplifier configured to stop operating and couples an output of the linear amplifier to a ground in a fixed voltage mode.