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:
May. 09, 2006
Filed:
Sep. 22, 2004
Applicants:
Osamu Kawabata, Tokyo, JP;
Koji Nakano, Aichi, JP;
Jun Utsumi, Kanagawa, JP;
Inventors:
Assignee:
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A DC/DC converter is comprised of a bipolar transistor, an inductor, a smoothing capacitor, an input terminal, an output terminal, and a grounded terminal. A base of the transistor includes a silicon germanium layer. The bipolar transistor has a high switching speed and a low on-state voltage through an optimization of a structure of the transistor.