Invention Grant
- Patent Title: Digital temperature compensation filtering
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Application No.: US17352095Application Date: 2021-06-18
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Publication No.: US11705203B2Publication Date: 2023-07-18
- Inventor: Henry Chin , Hua-Ling Cynthia Hsu , Wei Zhao , Fanglin Zhang
- Applicant: SanDisk Technologies LLC
- Applicant Address: US TX Addison
- Assignee: SanDisk Technologies LLC
- Current Assignee: SanDisk Technologies LLC
- Current Assignee Address: US TX Addison
- Agency: Vierra Magen Marcus LLP
- Main IPC: G11C16/00
- IPC: G11C16/00 ; G11C16/14 ; G11C16/26 ; G11C16/34 ; G06F1/20 ; G11C16/04 ; H01L25/065 ; H10B43/10 ; H10B43/27

Abstract:
Techniques disclosed herein cope with temperature effects in non-volatile memory systems. A control circuit is configured to sense a current temperature of the memory system and read, verify, program, and erase data in non-volatile memory cells by modifying one or more read/verify/program/erase parameters based on a temperature compensation value. The control circuit is further configured to read, verify, program, and erase data by accessing a historical temperature value stored in the memory system, the historical temperature value comprising a temperature at which a previous read, verify, program or erase occurred and measuring a current temperature value. The control circuit determines the temperature compensation value by applying a smoothing function. The smoothing function determines the temperature compensation value by selecting either the historical temperature value or the current temperature value as the temperature compensation value based on a difference between the historical temperature value and the current temperature relative to a threshold, or calculating the temperature compensation value, different from the current temperature value or the historical temperature value, based a smoothing function which utilizes the current temperature value and the historical temperature value.
Public/Granted literature
- US20220406383A1 DIGITAL TEMPERATURE COMPENSATION FILTERING Public/Granted day:2022-12-22
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