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:
May. 25, 2004
Filed:
Dec. 07, 2001
Fujitsu Limited, Kawasaki, JP;
Abstract
Provided is a semiconductor integrated circuit device capable of, when data is written into a memory cell, fixing adjacent complimentary bit lines to a predetermined voltage, thereby reducing an effect of a write noise for a readout operation of the adjacent cells, making it possible to ensure stable operation. An address signal is inputted to a bit line short signal circuit and a column switch signal circuit, and the corresponding bit line short signal BRS or BRS and column switch signal CL or CL are selected. Complimentary bit lines /BL , /BL or bit lines BL and BL in which a memory cell is not connected according to the bit line short signals BRS and BRS are selected altogether, these bit lines are fixed to a precharge voltage VPR, and a write noise is shielded. The column switch signal CL or CL makes conductive the corresponding column switches, and the selected bit line BL , BL , /BL , or /BL is connected to a data bus DB or /DB.