Adaptive Voltage Adjustment Based on Temperature
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Solution Overview
Problem
The increasing power consumption and thermal output of integrated circuits (ICs) due to higher transistor counts and operating frequencies pose challenges for power management, particularly in portable devices, where reducing operating voltage is limited by the need for a guard band to ensure proper circuit operation across varying temperatures and noise conditions.
Innovation Solution
An integrated circuit (IC) with logic circuitry and temperature sensors that includes a power management circuit to adjust the operating voltage based on temperature readings, reducing the voltage by a guard band amount when temperatures exceed a threshold, leveraging knowledge from production tests to ensure proper function without the guard band voltage at known temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the operating voltage is reduced to save power, then power consumption decreases, but the ability to ensure proper circuit operation is limited due to the need for guard band voltage
Solution Approach 1:
The patent implements dynamic voltage adjustment by continuously monitoring temperature and adapting the operating voltage accordingly. When temperature is below threshold, the full guard band voltage is applied to ensure reliability; when temperature exceeds threshold, the guard band is reduced or removed, allowing lower operating voltage and reduced power consumption. This dynamic adaptation resolves the contradiction between power savings and operational reliability.
Solution Approach 2:
The patent changes the operating voltage parameter based on temperature conditions. By adjusting the voltage level according to thermal state, the system optimizes power consumption while maintaining sufficient voltage for proper circuit operation under varying thermal conditions, thus resolving the contradiction between energy efficiency and operational reliability.
2Reliability
If a guard band voltage is added to ensure proper operation across temperature variations, then circuit reliability improves, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the guard band voltage based on real-time temperature monitoring. Instead of applying a fixed guard band, the system reduces or removes the guard band when temperature exceeds the threshold, thereby reducing power consumption while maintaining reliability when needed. This dynamic approach resolves the contradiction between maintaining reliability and minimizing power consumption.
Solution Approach 2:
The operating voltage parameter is changed based on temperature conditions. The system applies higher voltage (with guard band) when cold for reliability, and reduces voltage (removing guard band) when hot for power savings. This parameter adaptation resolves the contradiction between reliability and power consumption.
3Measurement precision
If temperature sensors are designed with high precision to accurately monitor IC temperature, then temperature measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent employs simple, inexpensive temperature sensing elements such as diodes or bandgap voltage references that provide sufficient temperature indication without requiring complex sensor designs. These simple sensors compare temperature against a threshold value rather than providing precise continuous measurement, thereby achieving adequate functionality with minimal complexity.
Solution Approach 2:
The system changes the approach from precise continuous temperature measurement to threshold-based temperature indication. By only determining whether temperature exceeds a critical threshold rather than measuring exact temperature values, the system achieves sufficient measurement precision for voltage adjustment purposes while keeping the sensor design simple and low-complexity.
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 allows for adaptive voltage adjustment, reducing power consumption and thermal output while ensuring sufficient voltage for IC operation, with simplified temperature sensor design and potential for additional power savings across a range of temperatures.
Implementation Method 1
an integrated circuit (IC) includes logic circuitry having at least one temperature sensor therein
Data Source
AI summary
Various embodiments of a method and apparatus for performing adaptive voltage adjustment based on temperature value are disclosed. In one embodiment, and integrated circuit (IC) includes logic circuitry having at least one temperature sensor therein. The IC also includes a power management circuit coupled to receive temperature readings from the temperature sensor. The power management circuit is configured to determine a temperature of the IC based on a temperature reading received from the temperature sensor. The power management circuit may compare the determined temperature to a temperature threshold. If the temperature exceeds a temperature threshold value, the power management circuit may cause the operating voltage to be reduced by an amount equivalent to a voltage guard band.