Memory Error Correction Circuit Permanent Transient Classification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As memory device capacities increase, it becomes challenging to fabricate memory devices without defective memory cells, and existing methods for error correction in memory systems are limited in distinguishing between permanent and transient errors.
Innovation Solution
The proposed solution involves an operating method for a memory that includes reading codewords with error correction codes, detecting errors, correcting them, rewriting the corrected codewords, re-reading them, and determining whether the errors are permanent by checking for their persistence after correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If memory device capacity is increased, then storage capability is improved, but the likelihood of defective memory cells increases
Solution Approach 1:
The patent performs preliminary error detection and classification before final data retrieval. By executing error check operations and determining whether errors are permanent or transient before normal read operations, the system proactively identifies and manages defective memory cells, preventing data corruption and ensuring reliable operation of high-capacity memory devices
2Reliability
If error correction is performed using existing methods, then errors are corrected, but the distinction between permanent and transient errors is not made
Solution Approach 1:
The patent segments the error correction process into distinct phases: error detection, error type determination (permanent vs. transient), and differentiated handling. By classifying errors into separate categories, the system applies appropriate correction strategies for each type, improving both reliability and measurement precision in error management
Solution Approach 2:
The patent implements a feedback mechanism where error check operations provide information about error types, which then influences subsequent error handling decisions. The determination of whether errors are permanent or transient feeds back into the error correction process, enabling more precise and effective error management
Data Source
AI summary
Disclosed is an operating method of a memory, and the operating method may include reading, from selected memory cells included in the memory, codewords including data and an error correction code; detecting errors in the codewords; correcting the errors in the codewords; re-writing the error-corrected codewords to the selected memory cells; re-reading the re-written error-corrected codewords from the selected memory cells; and determining whether the errors are permanent errors in response to a determination that an error is present in the re-read error-corrected codewords.