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. 20, 2001
Filed:
Dec. 24, 1998
Katsuya Tanaka, Kokubunji, JP;
Masayoshi Yagyu, Hanno, JP;
Tatsuya Saito, Hachioji, JP;
Tetsuya Uemura, Sayama, JP;
Tomohisa Iwanaga, Ebina, JP;
Hiroki Yamashita, Hachioji, JP;
Takeshi Kato, Akishima, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A condenser having a huge area is required to reduce a noise on LSI power supply nets (−&Dgr;VDD) of an integrated circuit because a bypass condenser can only utilize a part of accumulated electric charges. A noise of LSI power supply nets is suppressed by generating a noise of a reversed polarity (+&Dgr;VDD) to the noise on the LSI power supply nets (−&Dgr;VDD), based upon a noise reducing circuit discharging a condenser charged with a high voltage. A noise reduction effect equivalent to a bypass condenser having a large capacity is obtained even when a condenser having a small capacity is used.