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. 28, 2007
Filed:
Mar. 21, 2001
Toshihiko Kyogoku, Komoro, JP;
Tadashi Kodu, Saku, JP;
Kiyoharu Mochiduki, Komoro, JP;
Sakae Kikuchi, Yachiho, JP;
Akio Ishidu, Maruko, JP;
Yoshihiko Kobayashi, Tateshina, JP;
Masashi Maruyama, Komoro, JP;
Iwamichi Kojiro, Komoro, JP;
Susumu Sato, Komoro, JP;
Toshihiko Kyogoku, Komoro, JP;
Tadashi Kodu, Saku, JP;
Kiyoharu Mochiduki, Komoro, JP;
Sakae Kikuchi, Yachiho, JP;
Akio Ishidu, Maruko, JP;
Yoshihiko Kobayashi, Tateshina, JP;
Masashi Maruyama, Komoro, JP;
Iwamichi Kojiro, Komoro, JP;
Susumu Sato, Komoro, JP;
Hitachi, Ltd., Tokyo, JP;
Eastern Japan Semiconductor Technologies, Tokyo, JP;
Akita Electronics Co., Ltd., Akita, JP;
Abstract
A high frequency power amplifying device has two amplifying lines. Each amplifying line has a configuration in which a plurality of amplifying stages are connected in cascade having two source voltage terminals, of which one is connected to the first amplifying stage of one amplifying line and to the remaining amplifying stages of the other amplifying line, and the other, to the first amplifying stage of the latter amplifying line and to the remaining amplifying stages of the former amplifying line. An air core coil with a low D.C. resistance, formed by spirally winding a copper wire of about 0.1 mm in diameter, is connected in series between the final amplifying stage of each amplifying line and the source voltage terminal.