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:
Mar. 11, 1997
Filed:
Aug. 22, 1995
Tadashi Takahashi, Hitachi, JP;
Akihiko Kanouda, Hitachinaka, JP;
Kazuhiro Takizawa, Yokohama, JP;
Tetsunosuke Nakamura, Yokohama, JP;
Masami Joraku, Ibaraki, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Media Electronics Co., Ltd., Iwate, JP;
Abstract
A compact, thin-type, noise-tolerant and highly reliable electric power unit includes an input portion through which a predetermined voltage is applied, a plurality of power circuits for generating a plurality of different voltages from the predetermined voltage applied to said input portion, an output portion for outputting the plurality of different voltages generated in the plurality of power circuits, a control unit having a function to stabilize the plurality of different output voltages, and an insulated substrate which supports the input portion, the plurality of power circuits, the output portion and the control unit, and further has a printed wiring pattern for electrically coupling the constituent components of the electric power unit. By disposing each group of components which compose each of plurality of power circuits into a predetermined area corresponding to each output voltage, or by arranging the components such that the height of each of the plurality of constituent components for the power circuits is adapted to become approximately the same as or less than the height of the transformer, a compact and thin-type elective power unit which is noise-tolerant and highly reliable is achieved.