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.

Date of Patent:
Aug. 11, 2020

Filed:

Aug. 13, 2019
Applicant:

International Business Machines Corporation, Armonk, NY (US);

Inventors:

Megumi Ito, Adachi-ku, JP;

Masatoshi Ishii, Yokohama, JP;

Atsuya Okazaki, Tokyo, JP;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06N 3/063 (2006.01); G06N 3/08 (2006.01); H01L 45/00 (2006.01); H01L 27/24 (2006.01); G11C 13/00 (2006.01);
U.S. Cl.
CPC ...
G06N 3/063 (2013.01); G06N 3/0635 (2013.01); G06N 3/08 (2013.01); G11C 13/004 (2013.01); G11C 13/0004 (2013.01); H01L 27/2463 (2013.01); H01L 45/06 (2013.01);
Abstract

A computer-implemented method is provided for refreshing cells in a Non-Volatile Memory (NVM)-based neuromorphic circuit wherein synapses are each composed of a respective cell pair formed from a respective Gp cell and a respective Gm cell of the cells. The method includes randomly selecting multiple neurons and reading a conductance of any of the synapses connected to the multiple neurons. The method further includes selecting any of the synapses connected to the selected multiple neurons for which the Gm conductance has reached a maximum conductance. The method also includes resetting the Gp cell and Gm cell of the selected synapses, and setting, at most, one of the Gp cell and Gm cell of each of the selected synapses to recover an effective total weight of each of the selected synapses.


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