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:
Apr. 07, 1987
Filed:
Aug. 29, 1984
Roger D Norwood, Sugar Land, TX (US);
Chitranjan Reddy, Sunnyvale, CA (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A semiconductor dynamic memory device contains differential sense amplifiers for detecting the charge on bit lines, and active pull-up circuits for restoring bit lines to a full 1 level. The pull-up circuits are not activated on the dummy cell sides, however, because the power used to restore the dummy cell would be wasted since the dummy cell capacitors are always discharged. The device illustrated uses folded bit lines and multiplexed sense amplifiers; one of two opposite pairs of bit lines is selected. The two opposite pairs share precharge and active pull-up circuits on one side of the array, and share column output lines on the opposite side. The multiplex circuitry selects one side or the other for sensing, and also couples precharge and boost voltages or read/write data back and forth from one side of the sense amplifier to the other.