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. 14, 2003
Filed:
Jun. 27, 2001
Hiroyuki Ohtake, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
When a write & auto precharge command is input into a chip, signals CPSRX and AUTPL are at “H”. After finishing a column operation, the level of the signal CPSRX shift to “L”. When CPSRX=“L” and AUTPL=“H”, if a signal CSLCK is at “H”, an auto precharge enable signal AUTPE is at “H”. The signal AUTPE is at “H” when the signal CSLCK is at “H”, and does not depend upon the leading edge of an external clock VCLK. Since auto precharge is executed from the time a column select line CSL is activated, the time the potential of a selected word line is shifted to a non-selection level can be kept constant irrespective of the frequency of the external clock.