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:
Dec. 17, 2013
Filed:
Mar. 25, 2010
Richard J. Carter, Los Altos, CA (US);
Richard J. Carter, Los Altos, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Embodiments of the present invention are directed systems and methods for reading the resistance states of crossbar junctions of a crossbar array. In one aspect, a system includes one or more sense amplifiers connected to column wires of the crossbar array, a reference row wire connected to each sense amp, and a wire driver connected to the reference row wire and configured to drive the reference row wire. The sense amplifiers are configured so that when a selected row wire of the crossbar array is driven by a sense voltage, the column wires are held at approximately zero volts and pass currents through the column wires and sense amplifiers to the reference row wire so that resistive voltage losses along the reference row wire substantially mirror the resistive voltage losses along the selected row wire, allowing the sense amplifiers to determine the crossbar junction resistance states.