Memory Device Sensing Node Noise Reduction via Preliminary Masking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing memory devices experience noise issues during sensing operations due to the high number of latches flipped during read operations, particularly when switching from high to low sensing voltages, which affects data accuracy and storage efficiency.
Innovation Solution
Implementing a method where a sensing node is masked based on the result of a first sensing operation, reducing the number of latches flipped during subsequent sensing operations by storing data in the latch only when necessary, thereby minimizing noise and improving data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensing operations are performed to sense logical pages in a selected page, then data sensing completeness is improved, but noise increases due to high number of latch flips
Solution Approach 1:
The patent applies preliminary action by performing a first sensing operation before the last sensing operation to obtain sensing data in advance. This preliminary sensing allows the system to prepare masking values beforehand, which are then used during the last sensing operation to prevent unnecessary latch flips and reduce noise while maintaining complete data sensing.
Solution Approach 2:
The patent introduces masking values as an intermediary element between the sensing operations and the latches. These masking values selectively control which latches should flip during sensing operations, preventing unnecessary latch transitions that generate noise while ensuring complete data is still sensed and captured.
2Reliability
If latches are flipped to store sensed data during read operations, then data storage is achieved, but noise is generated affecting data accuracy
Solution Approach 1:
The patent implements feedback by using sensing data obtained from preliminary sensing operations to generate masking values. These masking values are then fed back to control the latch behavior during subsequent sensing operations, creating a closed-loop system that adjusts latch flipping based on actual sensing results to minimize noise while ensuring accurate data storage.
Solution Approach 2:
Masking values serve as an intermediary that mediates between the sensing data and the latch storage mechanism. They selectively enable or disable latch flipping based on the sensed data patterns, reducing unnecessary latch transitions that generate noise while maintaining complete and accurate data storage.
3Object-generated harmful factors
If sensing node is controlled based on preliminary sensing data, then noise is reduced by minimizing latch flips, but device complexity increases
Solution Approach 1:
The patent reduces device complexity by performing preliminary sensing operations and generating masking values in advance, before the actual data storage operations. This approach allows the sensing node controller to use pre-computed masking values to minimize latch flips during critical sensing operations, reducing noise without requiring complex real-time control mechanisms.
Data Source
AI summary
The present technology relates to an electronic device. A memory device that reduces noise generated during a sensing operation includes a plurality of pages, each including a plurality of memory cells, a peripheral circuit configured to sense a selected page among the plurality of pages, the selected page including a selected memory cell and a sensing node controller configured to control, based on a result of a first sensing operation among a plurality of sensing operations that are performed to sense a logical page among a plurality of logical pages in the selected page, a sensing node in a page buffer coupled to the selected memory cell through a bit line during a second sensing operation.