Integrated Circuit Die Temperature Estimation via Command Tracking
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Solution Overview
Problem
Existing methods for temperature monitoring in integrated circuits, especially in safety-critical environments like car safety systems, require additional sensors that increase costs and space, and introduce noise into temperature measurements.
Innovation Solution
A temperature estimation circuit that calculates the die temperature of an integrated circuit by tracking temperature increases due to command signals and modeling temperature decreases using a mathematical model, eliminating the need for additional sensors by integrating the functionality into the data processing system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is added to measure the temperature of an integrated circuit, then temperature measurement capability is improved, but device complexity and cost increase
Solution Approach 1:
The integrated circuit device measures its own temperature using internal existing components (oscillator, counter, memory) without requiring external temperature sensors. The device serves itself by utilizing its own operational parameters (oscillation period) as a temperature indicator, thereby avoiding additional hardware complexity.
2Measurement precision
If a temperature sensor is added to measure the temperature of an integrated circuit, then temperature measurement capability is improved, but manufacturing cost increases
Solution Approach 1:
The integrated circuit device measures its own temperature using internal existing components (oscillator, counter, memory) without requiring external temperature sensors. The device serves itself by utilizing its own operational parameters (oscillation period) as a temperature indicator, thereby avoiding additional hardware complexity.
3Measurement precision
If a temperature sensor is added to measure the temperature of an integrated circuit, then temperature measurement capability is improved, but space requirements increase
Solution Approach 1:
The integrated circuit device measures its own temperature using internal existing components (oscillator, counter, memory) without requiring external temperature sensors. The device serves itself by utilizing its own operational parameters (oscillation period) as a temperature indicator, thereby avoiding additional hardware complexity.
4Measurement precision
If a temperature sensor is added to measure the temperature of an integrated circuit, then temperature measurement capability is improved, but measurement noise increases
Solution Approach 1:
The integrated circuit device measures its own temperature using internal existing components (oscillator, counter, memory) without requiring external temperature sensors. The device serves itself by utilizing its own operational parameters (oscillation period) as a temperature indicator, thereby avoiding additional hardware complexity.
Data Source
AI summary
A temperature estimation circuit for estimating a temperature of an integrated circuit die comprises a temperature increase estimation circuit, having inputs operable to receive notification signals, each corresponding to a command signal passed to an integrated circuit, and an output providing a sum of temperature increase values, each corresponding to a temperature increase of the integrated circuit due to one of the command signals. The circuit further comprises a temperature decrease estimation circuit, having an input operable to receive a calculated die temperature value, and an output providing a temperature decrease value depending on a mathematical model of temperature decrease when no command signal is applied. The circuit further comprises a temperature calculation circuit, having a first input connected to the output of the temperature increase estimation circuit, a second input connected to the output of the temperature decrease estimation circuit, and an output providing the calculated die temperature value.