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. 17, 2004
Filed:
Apr. 17, 2003
Trevor A. Blyth, Sandy, UT (US);
Richard V. Orlando, Los Gatos, CA (US);
Alta Analog, Inc., Los Gatos, CA (US);
Abstract
Reference voltages are disclosed for storage in addition to the analog or digital information for reconstructing the original voltage value of one or more analog or digital signals in non-volatile memory cells. The reference voltages are stored in separate memory cells and are written at the same time as the target information. The target information may be a single analog voltage, multiple analog voltages or a burst of digital data and is written during a relatively short period of time during which the ambient conditions do not change significantly. A method for reconstructing an original voltage value Va in a non-volatile memory, comprising: providing a set of reference voltages from a reference voltage generator; at time=0, storing a signal voltage Va in a cell and the set of reference voltages in a plurality of cells; at time=t, reading back the first signal voltage Va in the cell and the set of reference voltages from the plurality of cells to determine a retention differential compensation parameter and a temperature compensation parameter; and reconstructing the original voltage value of the signal voltage Va from the retention differential compensation parameter and the temperature compensation parameter.