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:
Feb. 15, 1994
Filed:
Jul. 17, 1991
Applicant:
Inventor:
Bahador Rastegar, Austin, TX (US);
Assignee:
SGS-Thomson Microelectronics, Inc., Carrollton, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36523005 ; 365190 ; 365202 ; 365206 ; 365221 ; 36523003 ; 365231 ;
Abstract
A dual-port memory device provides for a memory array which is divided approximately in half. Between the two halves of the array, a bit line crossover scheme is provided which minimizes stray capacitance and cross-coupling capacitance between bit lines for the two different ports. A bit line layout plan which minimizes such capacitances causes the data for one of the ports to be inverted in one-half of the array. When data from this half of the array is read or written by such port, the data being read or written must be inverted.