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:
May. 04, 2010
Filed:
Dec. 27, 2006
Jaskarn Johal, Colorado Springs, CO (US);
Daryl Dietrich, Woodland Park, CO (US);
John Roger Gill, Colorado Springs, CO (US);
Jaskarn Johal, Colorado Springs, CO (US);
Daryl Dietrich, Woodland Park, CO (US);
John Roger Gill, Colorado Springs, CO (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A system and method for determining a SONOS Vwindow using a current sensing scheme is disclosed. The present invention creates a first current path and a second current path through the volatile and non-volatile sections of an nvSRAM memory cell. The erase threshold voltage of the first edge of the window is determined when current is detected in the first path. The program voltage of the second edge of the window is determined when current is detected in the second path. Accordingly, the voltage used to power a plurality of SONOS transistors may be set using the values of the first and second threshold edges to determine the Vwindow.