Thermal Diode Self-Correction for Processor Temperature Sensing
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Solution Overview
Problem
Current thermal management solutions for integrated circuits suffer from inaccuracies in temperature sensing due to separate corrections for ideal diode and series resistance errors, leading to increased temperature errors and reduced reliability in processor operation.
Innovation Solution
A self-correction method using a constant correction factor that accounts for the negative correlation between voltage and reference temperature, and the positive correlation between resistance and reference temperature of a thermal diode, allowing for improved temperature calculation and reduced error in thermal diode measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate corrections for ideal diode and series resistance errors are applied, then temperature sensing accuracy is improved, but temperature errors increase and reliability decreases
Solution Approach 1:
The thermal diode sensor performs self-correction by utilizing its own characteristics (negative correlation between voltage and temperature, positive correlation between resistance and temperature) to compensate for measurement errors. The sensor automatically adjusts its readings without requiring external correction mechanisms, thereby maintaining both high accuracy and reliability.
Solution Approach 2:
The invention changes the measurement parameters by simultaneously considering both voltage and resistance measurements of the thermal diode. By incorporating resistance measurement into the temperature calculation alongside voltage measurement, the system achieves more accurate temperature sensing while maintaining reliability through the complementary nature of these two parameters.
2Measurement precision
If separate corrections for ideal diode and series resistance errors are applied, then temperature sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The invention merges the correction of ideal diode errors and series resistance errors into a unified self-correction mechanism. Instead of applying separate correction procedures, the system combines both corrections into a single integrated process that uses the thermal diode's inherent characteristics, thereby reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The thermal diode serves multiple functions: it acts as both the temperature sensing element and the correction mechanism. By utilizing the same component for both measurement and self-correction, the invention eliminates the need for separate correction circuits or algorithms, thereby simplifying the overall device architecture.
3Measurement precision
If multiple correction factors and error values are considered, then temperature measurement accuracy is improved, but calibration complexity increases
Solution Approach 1:
The thermal diode automatically performs calibration through self-correction using its own electrical characteristics. The system determines correction factors by measuring the thermal diode's voltage and resistance at known temperature points, then uses these self-derived factors for ongoing temperature measurements, eliminating the need for external calibration procedures.
Solution Approach 2:
The invention changes the calibration approach by using resistance measurement as an additional parameter to determine correction factors. Instead of relying solely on voltage measurements, the system incorporates resistance data to calculate more accurate correction factors, thereby improving temperature measurement accuracy while streamlining the calibration process.
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 significantly decreases temperature errors, providing more accurate power management and extending the life cycle of processors by improving temperature sensing accuracy and reducing temperature-dependent calibration complexities.
Implementation Method 1
a negative correlation between the voltage and a reference temperature of the thermal diode
Implementation Method 2
a positive correlation between a resistance of the thermal diode and the reference temperature
Data Source
AI summary
Temperature of a processor is monitored and managed by a control circuit. A thermal diode is positioned to indicate the temperature of the processor. A controller measures a voltage across the thermal diode and calculates a temperature of the thermal diode as a function of the voltage and a correction factor. The correction factor is a constant value that is determined based on 1) a negative correlation between the voltage and a reference temperature of the thermal diode, and 2) a positive correlation between a resistance of the thermal diode and the reference temperature. The controller causes the processor to alter an operation in response to the temperature being above a threshold.