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. 27, 1999
Filed:
Jul. 01, 1997
John M Callahan, San Ramon, CA (US);
Enable Semiconductor, Inc., Milpitas, CA (US);
Abstract
A read only memory including: a plurality of memory cells arranged in x rows and y columns in an array; x wordlines each connected to y memory cells in a respective row; y bitlines each associated with x memory cells in a respective column; m reference bitlines each corresponding to n bitlines, each of the reference bitlines having x reference cells each connected to a respective wordline; and m sense amplifiers each having a first input terminal connected to a respective n bitlines and having a second input terminal connected to one of the reference bitlines, and each being responsive to a difference between a signal on one of the n bitlines and a signal on one of the reference bitlines.