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:
Aug. 05, 2003
Filed:
Mar. 25, 2002
Applicant:
Inventors:
Yukinari Fujiwara, Tokyo, JP;
Yoshitaka Shinomiya, Tokyo, JP;
Assignee:
Mobile Communications Tokyo Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/04 ; H03F 3/68 ;
U.S. Cl.
CPC ...
H03F 3/04 ; H03F 3/68 ;
Abstract
A high-frequency power amplifying apparatus includes a plurality of series-connected amplifiers, a power controller for selectively supplying an output terminal with an output from a desired one amplifier in accordance with a demanded output power and for causing one or more amplifiers downstream of the desired one amplifier to be in a cutoff state, and an output delay line connected between the output terminal and the final-stage amplifier and having a line length thereof providing the final-stage amplifier with a high impedance as viewed from the output terminal when the final-stage amplifier is in a cutoff state.