Invention Grant
- Patent Title: Auto-referenced memory cell read techniques
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Application No.: US17165579Application Date: 2021-02-02
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Publication No.: US11282571B2Publication Date: 2022-03-22
- Inventor: Graziano Mirichigni , Marco Sforzin , Alessandro Orlando
- Applicant: Micron Technology, Inc.
- Applicant Address: US ID Boise
- Assignee: Micron Technology, Inc.
- Current Assignee: Micron Technology, Inc.
- Current Assignee Address: US ID Boise
- Agency: Holland & Hart LLP
- Main IPC: G11C16/28
- IPC: G11C16/28 ; G11C11/56 ; G11C16/32 ; G11C16/30 ; G11C8/14 ; G11C16/08 ; G11C13/00 ; G11C7/14

Abstract:
Methods, systems, and devices related to auto-referenced memory cell read techniques are described. The auto-referenced read may encode user data to include a certain number bits having a first logic state prior to storing the user data in memory cells. Subsequently, reading the encoded user data may be carried out by applying a read voltage to the memory cells while monitoring a series of switching events by activating a subset of the memory cells having the first logic state. The auto-referenced read may identify a particular switching event that correlates to a median threshold voltage value of the subset of the memory cells. Then, the auto-referenced read may determine a reference voltage that takes into account a statistical property of threshold voltage distribution of the subset of the memory cells. The auto-referenced read may identify a time duration to maintain the read voltage based on determining the reference voltage. When the time duration expires, the auto-referenced read may determine that the memory cells that have been activated correspond to the first logic state.
Public/Granted literature
- US20210257022A1 AUTO-REFERENCED MEMORY CELL READ TECHNIQUES Public/Granted day:2021-08-19
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