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:
Nov. 02, 1999
Filed:
Jan. 20, 1998
Alexis Marquot, Arenthon, FR;
Jean-Claude Tarbouriech, Ville-la-Grand, FR;
Paul Dechamps, Ferney-Voltaire, FR;
Motorola, Inc., Schaumburg, IL (US);
Abstract
A portable data carrier (10) embodies an integrated circuit (12) with an EEPROM (24). The EEPROM has a number of rows of memory cells (32, 38, 44) each having outputs respectively coupled to bit lines (50, 54, 56), and control inputs coupled to a common control line (132). The bit lines each include a latch (60, 62, 64) that is set to provide a programming voltage (VPP) during write mode. The bit lines have serial switches (78, 80, 82) that break continuity when writing to the latches. The bit line latches are made transparent to the bit lines during read mode. The common control line is coupled through a programming transistor (130) to an erase line (72). The erase line must be driven to a programming voltage during erase mode. The erase line uses one of the bit line latches to provide its programming voltage.