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:
Jun. 16, 2009
Filed:
Oct. 28, 2005
Hideho Yamamura, Oiso, JP;
Naoki Maru, Hadano, JP;
Kazunori Nakajima, Sagamihara, JP;
Koji Nisisu, Hadano, JP;
Shigeo Oomae, Hadano, JP;
Hideho Yamamura, Oiso, JP;
Naoki Maru, Hadano, JP;
Kazunori Nakajima, Sagamihara, JP;
Koji Nisisu, Hadano, JP;
Shigeo Oomae, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This invention prevents a deterioration of efficiency of a power supply apparatus due to a semiconductor power supply voltage drop, prevents an increase in wasted power, and prevents erroneous operations due to feeder wire voltage drop. In the mounting structure of electronic circuits having a plurality of busbars as current paths on a printed circuit board, the plurality of busbars have almost parallel portions spaced a predetermined distance apart; a span of the parallel portions of the plurality of busbars is greater than the predetermined distance; and in the parallel portions of the plurality of busbars, the plurality of busbars are connected by a wiring pattern. In the switching power supply apparatus built on a printed circuit board, with its output voltage of less than 2 V and its output current of more than 100 A, a means is provided for making the power efficiency higher than 70%.