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. 28, 2003
Filed:
Apr. 16, 2002
Toru Matsuura, Katano, JP;
Hisashi Adachi, Minoo, JP;
Makoto Sakakura, Uji, JP;
Hiroyuki Handa, Hirakata, JP;
Toshio Obara, Yokohama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
To provide a power amplifier circuit with a smaller circuit scale and with good characteristics over a wide range of load impedance. A configuration includes: a DC/DC converter which delivers a supply voltage from a battery to a power amplifier according to control commands from a control circuit a directional coupler which outputs a signal from one terminal according to signal waves received by an antenna from a second matching circuit and outputs a signal from another terminal according to reflected waves received from the antenna and detectors and or the like.