Invention Grant
- Patent Title: Adjusting log likelihood ratio values to compensate misplacement of read voltages
- Patent Title (中): 调整对数似然比值以补偿读取电压的错位
-
Application No.: US14195058Application Date: 2014-03-03
-
Publication No.: US09396792B2Publication Date: 2016-07-19
- Inventor: Yunxiang Wu , Zhengang Chen , AbdelHakim S. Alhussien , Sundararajan Sankaranarayanan , Erich F. Haratsch
- Applicant: Seagate Technology LLC
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Cupertino
- Agency: Christopher P. Maiorana, PC
- Main IPC: H03M13/00
- IPC: H03M13/00 ; G11C11/56 ; G06F11/10 ; G11C29/52

Abstract:
An apparatus having a circuit and an interface to a nonvolatile memory is disclosed. The circuit is configured to (i) perform one or more attempts of a soft-decision decode of data stored in the nonvolatile memory, where soft-decision decode uses a plurality of log likelihood ratio values stored in a table, (ii) generate one or more adjusted log likelihood ratio values by adding a constant value to one or more of the log likelihood ratio values in response to a failure to decode the data using the log likelihood ratio values and (iii) re-decode the data using the adjusted log likelihood ratio values.
Public/Granted literature
- US20150243363A1 ADJUSTING LOG LIKELIHOOD RATIO VALUES TO COMPENSATE MISPLACEMENT OF READ VOLTAGES Public/Granted day:2015-08-27
Information query
IPC分类: