Memory Device Pattern Identification Using Sense Amplifiers
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Solution Overview
Problem
Existing memory devices face challenges with high power consumption and low speed during pattern identification operations, often resulting in corrupted data due to the process of reading and comparing data patterns.
Innovation Solution
The memory device performs pattern identification operations internally and outputs a flag indicating a match or mismatch, using a word line to isolate memory cells from potential corruption, and employs a current mirror or biasing circuitry to detect voltage changes and amplify currents for accurate matching detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pattern identification is performed by reading and comparing data patterns externally, then pattern matching can be achieved, but power consumption increases and data corruption occurs
Solution Approach 1:
The patent introduces sense amplifiers as intermediary components between the memory array and the external host device. These sense amplifiers perform the pattern comparison function internally, acting as mediators that eliminate the need to read out entire data patterns externally. The sense amplifiers compare the stored data pattern with the input pattern and generate a match/mismatch signal, thereby reducing power consumption and preventing data corruption while maintaining reliable pattern identification
Solution Approach 2:
The memory device performs pattern identification operations autonomously using its internal sense amplifiers and circuitry. The sense amplifiers self-compare the stored data with the input pattern without requiring external reading and comparison operations. This self-service approach allows the memory device to handle pattern matching internally, reducing the need for high-power external processing and preventing data corruption that would occur during external read operations
2Productivity
If pattern identification is performed by reading and comparing data patterns externally, then pattern matching can be achieved, but operation speed decreases
Solution Approach 1:
The patent merges the pattern comparison function with the memory device's internal sense amplifiers. Instead of separate external reading and comparison operations, the sense amplifiers perform both functions integrated within the memory device. This merging of functions accelerates pattern identification by eliminating data transfer delays and external processing steps, significantly improving operation speed while the added complexity is confined to the internal circuitry
3Reliability
If word line is activated for reading data, then data can be accessed, but data corruption occurs during pattern identification
Solution Approach 1:
The patent applies preliminary action by activating the word line only long enough to latch the stored data pattern into the sense amplifiers before deactivating it. This preliminary activation allows the sense amplifiers to capture and hold the data pattern for comparison with the input pattern. By limiting the word line activation duration to just what is needed for latching, the patent prevents data corruption during the subsequent comparison operation while still enabling data access for pattern identification
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption and increases speed while ensuring data integrity by performing pattern identification within the memory device and outputting a flag for the host device, allowing for efficient pattern matching without data corruption.
Implementation Method 1
employing a current mirror or biasing circuitry to detect voltage changes and amplify currents for accurate matching detection
Implementation Method 2
employing a current mirror or biasing circuitry to detect voltage changes and amplify currents for accurate matching detection
Data Source
AI summary
Methods, systems, and devices for non-destructive pattern identification at a memory device are described. A memory device may perform pattern identification within the memory device and output a flag indicating whether a first data pattern matches with a second data pattern. The memory device may access one or more memory cells, via a word line, and latch the second data pattern of the memory cells to a sense amplifier. The memory device may deactivate the word line, which may result in isolating the memory cells from potential destruction of data. The memory device may write a first data pattern to the sense amplifier and compare the first data pattern and second data pattern at the sense amplifier. The memory device may output a signal indicating whether the data patterns match.