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:
Jan. 28, 2014
Filed:
Sep. 15, 2012
Naoya Watanabe, Tokyo, JP;
Isamu Hayashi, Tokyo, JP;
Teruhiko Amano, Tokyo, JP;
Fukashi Morishita, Tokyo, JP;
Kenji Yoshinaga, Itami, JP;
Mihoko Akiyama, Itami, JP;
Shinya Miyazaki, Kodaira, JP;
Masakazu Ishibashi, Kodaira, JP;
Katsumi Dosaka, Tokyo, JP;
Naoya Watanabe, Tokyo, JP;
Isamu Hayashi, Tokyo, JP;
Teruhiko Amano, Tokyo, JP;
Fukashi Morishita, Tokyo, JP;
Kenji Yoshinaga, Itami, JP;
Mihoko Akiyama, Itami, JP;
Shinya Miyazaki, Kodaira, JP;
Masakazu Ishibashi, Kodaira, JP;
Katsumi Dosaka, Tokyo, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
An entry including multiple bits of unit cells each storing data bit is coupled to a match line. The match line is supplied with a charging current having a restricted current value smaller than a match line current flowing in a one-bit miss state in one entry, but larger than a match line current flowing in an all-bit match state in one entry. A precharge voltage level of a match line is restricted to a voltage level of half a power supply voltage or smaller. Power consumption in a search cycle of a content addressable memory can be reduced, and a search operation speed can be increased.