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. 23, 2008
Filed:
Dec. 19, 2006
Applicants:
Shingo Matsuda, Kyoto, JP;
Kazuki Tateoka, Kyoto, JP;
Hirokazu Makihara, Osaka, JP;
Inventors:
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/191 (2006.01);
U.S. Cl.
CPC ...
Abstract
A radio frequency power amplifierincludes a former-stage transistor, a latter-stage transistor, and an inter-stage matching circuitfor connecting the former-stage transistorand the latter-stage transistor. The inter-stage matching circuitincludes a high-pass filter circuit including a transfer line m, a capacitor Cand a capacitor C; and a transfer line mwith which a passage phase of a secondary harmonic signal is 15 degrees or greater.