Memory Sensing Using One-Time Table for MLC Read Speed
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Solution Overview
Problem
Multi-Level Cell (MLC) technology requires multiple sensing operations to read data from memory cells, which increases the complexity and time required for data retrieval.
Innovation Solution
A memory sensing method using a one-time sensing table that combines the results from multiple memory units to determine the stored data, reducing the number of sensing operations needed by utilizing a processing unit to look up the table with the obtained sensing results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensing operations are performed to read data from MLC memory cells, then data reading accuracy is improved, but the time required for data retrieval increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing sensing results in a sensing table during the programming phase. During read operations, the system performs a single sensing operation and directly looks up the result in the pre-prepared sensing table, eliminating the need for multiple sequential sensing operations while maintaining accurate data retrieval
Solution Approach 2:
The sensing table is constructed in advance during memory programming, storing the relationship between threshold voltages and data values. This preliminary preparation allows the read operation to skip multiple sensing steps by directly querying the pre-computed table with a single sensing result
2Measurement precision
If multiple sensing operations are performed to read data from MLC memory cells, then data reading accuracy is improved, but the complexity of the sensing process increases
Solution Approach 1:
The patent reduces sensing process complexity by pre-computing the sensing table during programming operations. The table stores mapping relationships between threshold voltages and data values, transforming a complex multi-step sensing process into a simple single sensing operation followed by a table lookup, thereby significantly simplifying the read operation workflow
Data Source
AI summary
A memory sensing method is provided. The memory sensing method comprises the following steps: sensing a first memory unit to obtain a first sensing result; sensing a second memory unit to obtain a second sensing result; and looking up a one-time sensing table according to the first and second sensing results to obtain an output data.