US 12,073,903 B1
Method and system for estimating and compensating for leakage current in memory unit cells
Umanath Ramachandra Kamath, Palo Alto, CA (US); Ali Mesgarani, Sunnyvale, CA (US); and Robert Wiser, Palo Alto, CA (US)
Assigned to Meta Platforms Technologies, LLP, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Feb. 22, 2023, as Appl. No. 18/172,983.
Int. Cl. G11C 29/00 (2006.01); G11C 29/50 (2006.01)
CPC G11C 29/50004 (2013.01) [G11C 29/50016 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a leakage monitoring and compensation system, comprising:
identifying a leakage monitoring component associated with a memory unit cell;
sampling a plurality of leak events during a first exposure window, the first exposure window comprising a first duration;
storing a first count representing the plurality of leak events sampled during the first exposure window, each leak event corresponding to a unit of memory leakage;
sampling a plurality of sensing events during a second exposure window, the second exposure window comprising a second duration;
detecting a second count representing the plurality of sensing events sampled during the second exposure window;
determining a compensation value representing a difference between the first count and the second count;
storing the compensation value as a leakage-adjustment value in a temperature-specific leakage compensation table; and
incorporating the temperature-specific leakage compensation table in a variable memory leakage compensation operation.