Localized Voltage Switching for IC Thermal Mitigation
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Solution Overview
Problem
Increasing thermal management challenges in integrated circuits (ICs) due to high heat generation from complex processors in wireless communication devices, which affects performance and reliability.
Innovation Solution
A method and apparatus that adjust voltage by using a control circuit to detect temperature thresholds and adjust switches to reduce power provided to IC cores, allowing for independent voltage adjustments across different cores sharing a power domain for thermal mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If processor complexity and operating frequency are increased to meet performance demand, then processing capability is improved, but heat generation increases
Solution Approach 1:
The patent segments the power domain into multiple independently controllable voltage regions, each with its own set of switches. This allows selective power reduction in specific high-heat areas while maintaining full power in other regions, thus managing heat generation without sacrificing overall processing capability.
Solution Approach 2:
The patent applies different power levels to different locations within the power domain by controlling switches independently for each voltage region. This local quality approach enables thermal mitigation precisely where heat generation is highest while preserving performance in cooler regions.
2Temperature
If voltage is reduced to mitigate thermal issues, then heat generation is reduced, but processing performance degrades
Solution Approach 1:
By dividing the power domain into multiple voltage regions with independent switch control, the system can reduce voltage only in specific high-heat regions while maintaining higher voltage in other regions. This segmentation allows thermal mitigation without proportionally degrading overall processing performance.
Solution Approach 2:
The patent dynamically adjusts voltage levels in real-time based on thermal conditions detected by temperature sensors. The control circuit continuously monitors temperature and adjusts switch states accordingly, enabling adaptive voltage scaling that responds to changing thermal and performance requirements.
3Device complexity
If traditional thermal management approaches are used, then thermal control is simplified, but fine-grained power management is lost
Solution Approach 1:
The patent introduces segmented voltage control regions with independent switch arrays, enabling fine-grained power management. While this increases device complexity compared to traditional approaches, it provides the adaptability to manage power at a granular level, allowing precise thermal control in high-performance applications.
Solution Approach 2:
The control circuit acts as an intermediary between temperature sensors and voltage regulation, processing thermal data and adjusting switch states accordingly. This intermediary layer enables automated, fine-grained power management while abstracting the complexity from the overall system control.
4Device complexity
If voltage adjustment is applied uniformly across the power domain, then implementation is simplified, but localized thermal mitigation is ineffective
Solution Approach 1:
The patent divides the power domain into multiple voltage regions, each with independent switch control. This segmentation enables localized thermal mitigation by allowing voltage reduction in specific high-heat regions while maintaining normal voltage elsewhere, significantly improving thermal mitigation effectiveness compared to uniform voltage adjustment.
Solution Approach 2:
By applying different voltage levels to different locations within the power domain, the system achieves local quality control. This allows targeted thermal management in specific regions where heat generation is highest, improving overall thermal mitigation effectiveness while maintaining system reliability.
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
Effectively reduces heat generation by dynamically adjusting operating voltages, thereby enhancing the performance and reliability of ICs by managing thermal levels within acceptable limits.
Implementation Method 1
a plurality of thermal sensors disposed at different locations about the circuit and configured to detect temperatures at the different locations
Implementation Method 2
adjusting the plurality of switches in proximity with the location to reduce power provided
Data Source
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AI summary
Apparatuses and methods to adjust voltage for thermal mitigation are provided. The apparatus includes a circuit, a plurality of switches configured to provide power of a power domain to the circuit, a plurality of thermal sensors disposed at different locations about the circuit and configured to detect temperatures at the different locations, and a control circuit configured to determine that one of the detected temperatures at one of the locations exceeds a temperature threshold, and in response, adjust one or more of the plurality of switches in proximity with the one location to reduce power provided to the circuit. The method includes providing power of a power domain through a plurality of switches, detecting a temperature at a location exceeding a temperature threshold, and adjusting the plurality of switches in proximity with the location to reduce the power provided, in response to the detecting the temperature exceeding the temperature threshold.