Adaptive Voltage Scaling via Temperature-Dependent Timing Calibration
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Solution Overview
Problem
Existing adaptive voltage scaling technologies face challenges in dynamically adjusting voltage margins according to real-time temperature changes, leading to power loss and reduced power reduction effectiveness due to the need for reserved margins to prevent logic errors.
Innovation Solution
A method that acquires internal temperature and time sequence codes, selects appropriate time sequence reference calibration codes based on temperature, and compares these codes to determine adjustment voltages, allowing for adaptive voltage adjustments that reduce power consumption by varying voltage margins according to temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a voltage adjustment margin is reserved to prevent logic errors during temperature changes, then system reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic voltage margin adjustment by continuously monitoring temperature changes and adapting the voltage margin accordingly. When temperature changes are slow, the voltage margin is reduced to minimize power consumption. When temperature changes rapidly, the voltage margin is increased to prevent logic errors. This dynamic adaptation resolves the contradiction by making the voltage margin flexible rather than fixed.
Solution Approach 2:
The patent changes the voltage margin parameter based on temperature change rate. By detecting the rate of temperature change and adjusting the voltage margin parameter dynamically, the system achieves both reliability (preventing logic errors when needed) and energy efficiency (reducing margin when safe). This parameter adaptation directly addresses the technical contradiction.
2Reliability
If a fixed voltage margin is used to ensure no logic errors under all conditions, then system reliability is improved, but power reduction effectiveness deteriorates
Solution Approach 1:
The patent replaces the fixed voltage margin with a dynamic adjustment mechanism that responds to real-time temperature conditions. The system monitors temperature change rates and adjusts the voltage margin dynamically, ensuring reliability only when necessary and reducing power loss during stable temperature conditions. This transforms a static, overly conservative approach into an adaptive solution.
Solution Approach 2:
The voltage margin parameter is changed dynamically based on temperature monitoring. The system adjusts this parameter in real-time according to the rate of temperature change, achieving the dual goals of preventing logic errors (when temperature changes rapidly) and minimizing power loss (when temperature is stable).
3Stability of the object's composition
If voltage adjustment is performed slowly to maintain stability, then system stability is improved, but response to dramatic parameter changes deteriorates, causing logic errors
Solution Approach 1:
The patent implements dynamic response adjustment by monitoring temperature change rates. When rapid temperature changes are detected, the system increases the voltage adjustment speed to match the thermal transient, preventing logic errors. During stable temperature conditions, the adjustment speed is reduced to maintain stability. This dynamic speed adaptation resolves the contradiction between stability and responsiveness.
Solution Approach 2:
The voltage adjustment parameters (such as adjustment magnitude and timing) are changed dynamically based on temperature change rate detection. This allows the system to accelerate voltage adjustments during rapid thermal transients while maintaining conservative, stable behavior during normal operation, effectively resolving the speed-stability trade-off.
4Reliability
If a large voltage margin is reserved for all temperature conditions, then logic error prevention is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic voltage margin adjustment that adapts to real-time temperature conditions. During rapid temperature changes, a large voltage margin is maintained to prevent logic errors. During stable temperature periods, the voltage margin is reduced significantly, lowering power consumption. This dynamic adaptation eliminates the need for a consistently large margin.
Solution Approach 2:
The voltage margin parameter is dynamically changed based on temperature stability detection. The system reduces the voltage margin parameter during stable thermal conditions and increases it only during rapid temperature transitions, achieving both reliability and energy efficiency through parameter adaptation.
Data Source
AI summary
The present invention discloses a method, an apparatus, and a system for adaptively adjusting a voltage. The method includes: acquiring an internal temperature code of a system chip and a time sequence code of a system logic circuit, where the internal temperature code is detected by a temperature sensor and the time sequence code is output by a time sequence monitoring unit; selecting a time sequence reference calibration code from multiple configured time sequence reference calibration codes according to the acquired temperature code; and comparing the acquired time sequence code with the selected time sequence reference calibration code and determining, according to a comparison result, an adjustment voltage to be output for a system load. By using the foregoing method, the present invention can better reduce a power loss and achieve a better power reduction effect.