Dynamic Voltage Drop Detection Threshold Adjustment
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Solution Overview
Problem
Existing memory devices face inefficiencies in voltage drop detection, leading to conservative power loss event indications and potential false positives, which can result in unnecessary data loss and operational instability.
Innovation Solution
The implementation of a voltage drop detection (Vdet) module that dynamically adjusts its threshold voltage by monitoring error parameters such as bit-error-rate (BER) during manufacturing and operation, allowing for progressive reduction of trigger supply voltage while ensuring data integrity and reducing false positives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed voltage drop detection threshold is used based on specification, then power loss events can be detected, but false positives occur and unnecessary data loss results
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed voltage threshold to a dynamic threshold that adapts based on actual device performance. The Vdet module continuously monitors error parameters such as bit-error-rate (BER) and adjusts the voltage threshold accordingly, allowing the system to optimize detection accuracy while minimizing false positives during operation.
Solution Approach 2:
The patent implements feedback by using error parameters (BER) as feedback signals to adjust the voltage threshold. The Vdet module monitors BER and uses this information to dynamically modify the threshold, creating a closed-loop system that continuously optimizes detection accuracy based on actual device performance and reduces false power loss indications.
2Measurement precision
If the voltage threshold is lowered to reduce false positives, then detection accuracy improves, but data integrity may be compromised
Solution Approach 1:
The patent uses error parameters as feedback to dynamically adjust the threshold, allowing the system to find the optimal balance between detection precision and data integrity. By continuously monitoring BER and adjusting the threshold based on actual error rates, the system maintains high detection precision while ensuring data integrity is preserved through adaptive threshold selection.
Solution Approach 2:
The patent applies parameter changes by modifying the voltage threshold based on error parameters such as BER. The system changes the threshold parameter dynamically according to measured error rates, allowing optimization of detection precision while maintaining data integrity through adaptive parameter adjustment rather than fixed conservative values.
3Reliability
If a conservative voltage threshold is used, then data integrity is maintained, but operational stability decreases due to false power loss indications
Solution Approach 1:
The patent applies dynamics by making the threshold adaptive rather than static. The Vdet module continuously adjusts the voltage threshold based on monitored error parameters, allowing the system to maintain data integrity through conservative thresholds when needed while improving operational stability by reducing false positives when error rates are low.
Solution Approach 2:
The patent uses parameter changes by adjusting the voltage threshold based on error parameters. The system dynamically modifies the threshold parameter to balance data integrity and operational stability, changing from conservative fixed values to adaptive values that reflect actual device performance and error conditions.
Data Source
AI summary
Devices and techniques for an adjustable voltage drop detection threshold in a memory device are disclosed herein. A voltage drop detection threshold of a memory device is dynamically established. A power loss event is triggered when the supply voltage falls below the voltage drop detection threshold. An error parameter associated with performing multiple memory operations on the memory device is collected. The multiple memory operations are performed while applying a supply voltage at a second supply voltage level of the memory device which is less than a first supply voltage level established as a first operating voltage for the memory device. Determining whether the error parameter is below an allowable error threshold. In response to determining that the error parameter is below the allowable error threshold, the voltage drop detection threshold is established at a voltage level less than the first supply voltage level.