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:
Feb. 01, 2011
Filed:
Feb. 12, 2008
Haruka Shimizu, Kokubunji, JP;
Katsumi Ishikawa, Hitachinaka, JP;
Masahiro Nagasu, Hitachinaka, JP;
Dai Tsugawa, Mito, JP;
Haruka Shimizu, Kokubunji, JP;
Katsumi Ishikawa, Hitachinaka, JP;
Masahiro Nagasu, Hitachinaka, JP;
Dai Tsugawa, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An object of the present invention is to reduce the conducting loss of an existing conversion circuit while suppressing its noise. The present invention is typically a circuit arrangement includes at least one switching device and a free-wheel diode connected in parallel with the switching device. The free-wheel diode is formed by connecting a silicon PiN diode in parallel with a Schottky barrier diode that uses a semiconductor material having a wider band gap than silicon as a base material. The silicon PiN diode and Schottky barrier diode are separate chips.