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:
Jul. 24, 2007
Filed:
Sep. 06, 2005
Hirohisa Ohtsuki, Ashiya, JP;
Kazuo Itoh, Takatsuki, JP;
Katsuji Satomi, Osaka, JP;
Hironori Akamatsu, Hirakata, JP;
Hirohisa Ohtsuki, Ashiya, JP;
Kazuo Itoh, Takatsuki, JP;
Katsuji Satomi, Osaka, JP;
Hironori Akamatsu, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A static random access memory (SRAM) includes a memory array, a sense amplifier circuit, a replica circuit and a dummy cell. The replica circuit has the same elements as memory cells, and includes plural replica cells which output a signal whose level corresponds to the number of stages provided to a common replica bit line. The dummy cell is connected as a load with the common replica bit line. The source of a drive transistor of the dummy cell is connected with a power source which is at the High level. This suppresses a leak current flowing from a replica bit line to the dummy cell.