Invention Grant
- Patent Title: Read threshold adjustment with feedback information from error recovery
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Application No.: US15404870Application Date: 2017-01-12
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Publication No.: US10468117B2Publication Date: 2019-11-05
- Inventor: Xiaoheng Chen , Wei Wang , Jingfeng Yuan , Jeffrey L. Whaley
- Applicant: SanDisk Technologies LLC
- Applicant Address: US TX Plano
- Assignee: SanDisk Technologies LLC
- Current Assignee: SanDisk Technologies LLC
- Current Assignee Address: US TX Plano
- Agency: Dickinson Wright PLLC
- Main IPC: G11C29/00
- IPC: G11C29/00 ; G11C29/50 ; G11C16/26 ; G11C16/34 ; G11C16/10 ; G11C16/04

Abstract:
A storage device with a memory may optimize the setting of a read threshold or read level. A feedback mechanism may be used responsive to there being a read retry error for providing the read threshold from the read retry. Specifically, recovery from a read failure can provide feedback information for dynamically optimizing read threshold values. Read threshold adjustments may occur each time there is a successful error recovery. The read threshold adjustment scheme may select one logical page or multiple logical pages from a recovered region. If a read threshold is found to be working, this threshold may be part of a feedback message to make an informed adjustment that optimizes the read threshold of other pages.
Public/Granted literature
- US20180197619A1 READ THRESHOLD ADJUSTMENT WITH FEEDBACK INFORMATION FROM ERROR RECOVERY Public/Granted day:2018-07-12
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