Memory Device Temperature Control Using Historical Data
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Solution Overview
Problem
Semiconductor memory devices face instability due to the delay between temperature sensing and control, leading to inaccuracies in temperature-based operational adjustments.
Innovation Solution
A method and device that include a temperature sensor, control logic circuit, and register to sense, process, and store temperature data, allowing for the calculation of an estimated temperature using past data to calibrate and improve control accuracy, reducing the impact of extraction delay time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensing is performed continuously, then temperature control accuracy is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary temperature sensing and stores multiple past temperature values in a register before control decisions are made. This allows the control logic to calculate estimated current temperature using historical data, reducing the need for continuous real-time sensing while maintaining accuracy.
Solution Approach 2:
The patent introduces an intermediary calculation process where the control logic circuit computes the estimated current temperature by combining multiple past temperature values. This intermediary step bridges the gap between discrete temperature samples and continuous temperature control requirements.
2Loss of time
If temperature extraction delay is reduced, then real-time control is improved, but measurement precision deteriorates
Solution Approach 1:
The system implements feedback by continuously storing temperature values in a register and using the control logic to calculate estimated current temperature based on historical data. This feedback mechanism compensates for extraction delay by predicting current temperature from past measurements, maintaining both real-time responsiveness and measurement precision.
Solution Approach 2:
Multiple past temperature values are preliminarily stored in the register before control decisions are made. This preliminary accumulation of temperature data allows the system to compensate for extraction delay through calculation, achieving both fast response and high precision.
3Measurement precision
If multiple temperature samples are stored, then temperature control accuracy is improved, but loss of time increases
Solution Approach 1:
The system uses a partial approach by storing a limited number of past temperature values (e.g., 4-8 samples) rather than all historical data. This partial storage provides sufficient accuracy for temperature control while minimizing data processing time and memory requirements.
Data Source
AI summary
A method of controlling a memory device including a temperature sensor includes sensing a temperature of the memory device and extracting an extracted temperature for controlling the memory device using the sensed temperature, storing the extracted temperature in the memory device, calculating an estimated temperature at a current time point using the extracted temperature and a plurality of past extracted temperatures stored in the memory device, and controlling the memory device using the estimated temperature.