Invention Grant
US09396792B2 Adjusting log likelihood ratio values to compensate misplacement of read voltages 有权
调整对数似然比值以补偿读取电压的错位

Adjusting log likelihood ratio values to compensate misplacement of read voltages
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.
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