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. 24, 2009
Filed:
Jun. 11, 2007
Andre Luis Vilas Boas, Campinas, BR;
Jefferson Daniel DE Barros Soldera, Campinas, BR;
Fabio DE Lacerda, Campinas, BR;
Alfredo Olmos, Campinas, BR;
Andre Luis Vilas Boas, Campinas, BR;
Jefferson Daniel De Barros Soldera, Campinas, BR;
Fabio De Lacerda, Campinas, BR;
Alfredo Olmos, Campinas, BR;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
Methods and corresponding systems for reading a memory cell include a first current sourced from a first current source into a summing node, wherein the first current source is coupled to a first reference. A second current is sourced from a second current source into the summing node, wherein the second current source is coupled to the first reference through a programmable fuse. A third current is sunk from the summing node with a current sink, wherein the current sink is coupled to a second reference, and wherein a third current limit is greater than a first current limit and less than the sum of the first current limit and the second current limit. A voltage at the summing node is output in response to the first current, the second current, and the third current. The first and second current sources, and the current sink can be current mirrors.