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:
Jan. 09, 2007
Filed:
Jun. 11, 2003
Hiroomi Ueda, Tokyo, JP;
Shintaro Shinjo, Tokyo, JP;
Noriharu Suematsu, Tokyo, JP;
Kazutomi Mori, Tokyo, JP;
Akira Inoue, Tokyo, JP;
Akira Ohta, Tokyo, JP;
Hiroaki Seki, Tokyo, JP;
Hiroomi Ueda, Tokyo, JP;
Shintaro Shinjo, Tokyo, JP;
Noriharu Suematsu, Tokyo, JP;
Kazutomi Mori, Tokyo, JP;
Akira Inoue, Tokyo, JP;
Akira Ohta, Tokyo, JP;
Hiroaki Seki, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A high frequency amplifier includes a constant voltage driven amplifierusing as its amplifying element a bipolar transistorwith its base biased by a constant voltage, and a constant current driven amplifierusing as its amplifying element a bipolar transistorwith its base biased by a constant current. The idle current of the constant current driven amplifieris set at a low value. In accordance with the idle current, the idle current of the constant voltage driven amplifieris adjusted, and the two amplifiers are combined in parallel.