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. 23, 1992
Filed:
Oct. 25, 1990
Yuzuru Fujita, Hadano, JP;
Bunichi Fujita, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Microcomputer System, Ltd., Tokyo, JP;
Abstract
A power supply device has its power supply conductor bars, in which a.c. currents caused by a.c. noises flow in the same direction, laid closely in parallel while retaining their insulation thereby to increase the total inductance so that the impedance increases without accompanied by an increase in the d.c. resistance of the power supply conductor bars. An increased coupling impedance of the power supply conductor bars effectively attenuates the a.c. noises from d.c. power units, which then supply d.c. power with reduced a.c. noises to an electronic apparatus such as a computer through the power supply device.