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:
Mar. 07, 2023
Filed:
Mar. 19, 2021
Biswajit Ray, Madison, AL (US);
Biswajit Ray, Madison, AL (US);
Abstract
A system performs analog memory sanitization by forcing voltage levels in memory cells to substantially the same voltage level so that they are indistinguishable regardless of the data that has been previously stored in the cells. In some embodiments, a special programming operation for sanitizing a plurality of memory cells forces the charge in the cells to approximately the same voltage level by increasing the voltage level of all cells regardless of the data currently stored in the cells. As an example, each cell may be programmed to a logical high bit value (e.g., a '0') by increasing the charge in each cell to a voltage level that is greater than the voltage level for writing the same logical bit value in a normal programming operation. Thus, after the programming operation is performed, the voltage levels of cells storing one logical bit value (e.g., a '0') prior to the programming operation may be indistinguishable from voltage levels of cells storing a different logical bit value (e.g., a “1”) prior to the programming operation.