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. 25, 2016
Filed:
Feb. 19, 2015
Applicant:
Panasonic Corporation, Osaka, JP;
Inventors:
Masahiro Kumagawa, Hyogo, JP;
Hisashi Adachi, Osaka, JP;
Assignee:
PANASONIC CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/217 (2006.01); H03F 3/00 (2006.01); H03F 1/02 (2006.01); H03F 1/32 (2006.01); H03F 3/24 (2006.01);
U.S. Cl.
CPC ...
H03F 3/005 (2013.01); H03F 1/0277 (2013.01); H03F 1/3205 (2013.01); H03F 3/2178 (2013.01); H03F 3/245 (2013.01); H03F 3/217 (2013.01); H03F 2200/231 (2013.01); H03F 2200/432 (2013.01);
Abstract
A power amplification apparatus generates a code for controlling the number of class D power amplifiers that are in operation among a plurality of class D power amplifiers, changes the duty ratio of a carrier wave signal in accordance with output voltage, and amplifies a transmission signal. A code for decreasing the number of class D power amplifiers in operation is generated when the duty ratio of the carrier wave signal is increased, while a code for increasing the number of class D power amplifiers in operation is generated when the duty ratio of the carrier wave signal is decreased.