Dynamic Voltage Control for IC Power Management
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Solution Overview
Problem
Existing methods for managing power consumption in integrated circuits (ICs) are limited in achieving high efficiency, particularly for very high-speed chips, as they often interfere with desired speed or throughput by adjusting clock frequencies or power consumption, which can lead to lower performance and incorrect functioning.
Innovation Solution
A supply voltage management system that dynamically controls output voltage to voltage islands within an IC based on monitored temperature and technology process category, using temperature sensing elements and a dynamic voltage controller to adjust voltage according to a process-voltage-temperature table, allowing for reduced power consumption without affecting clock frequency or speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If dynamic voltage scaling approaches adjust clock frequency and supply voltage to manage power consumption, then power consumption is reduced, but chip speed or throughput is interfered with
Solution Approach 1:
The patent divides the chip into multiple voltage islands, each with independent voltage control. This allows different regions to operate at different voltages based on their specific power and performance requirements, rather than uniformly reducing voltage across the entire chip. Each voltage island can maintain its clock frequency and speed independently while managing local power consumption.
Solution Approach 2:
The chip is segmented into multiple independently controllable voltage islands, each with its own voltage regulator and temperature monitoring. This segmentation enables granular power management where only specific regions are adjusted based on local temperature conditions, preserving overall chip performance while reducing power consumption in hot spots.
2Temperature
If thermal feedback approaches vary voltage and frequency to control heating, then temperature is controlled, but synchronization is compromised
Solution Approach 1:
Temperature monitoring and voltage adjustment are performed locally at each voltage island rather than globally across the entire chip. Each island independently monitors its own temperature and adjusts its voltage accordingly, maintaining local thermal control without disrupting the global clock synchronization signal that coordinates all islands.
Solution Approach 2:
The thermal management system is segmented into independent control units for each voltage island. Each unit contains its own temperature sensor and voltage regulator that operate autonomously, allowing temperature control without requiring changes to the global clock frequency or synchronization mechanism.
3Use of energy by moving object
If on-chip oscillator dynamically adjusts output frequency to manage power consumption, then power consumption is reduced, but an on-chip oscillator is required instead of external clock generator
Solution Approach 1:
The clock generation function is segmented and distributed to external clock generators that remain unchanged, while only the voltage regulation and power management are integrated on-chip. This allows dynamic power management through voltage control without requiring replacement of the external clock generation system, maintaining simplicity while achieving power savings.
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 effectively manages power consumption in ICs, enhancing performance and longevity by adjusting voltage based on temperature and process category, thereby reducing faults and maintaining high-speed operation without compromising processing speed.
Implementation Method 1
one or more temperature sensing elements located on the IC die and configured to sense temperature of the IC die and to output a sensed temperature value
Implementation Method 2
a voltage adjusting unit configured to receive a sensed temperature value from the temperature monitoring unit and to adjust an output voltage to at least one circuit of the IC die based on at least the sensed temperature value
Data Source
AI summary
A supply voltage management system and method for an integrated circuit (IC) die are provided. The supply voltage management system includes one or more temperature sensing elements located on the IC die and configured to sense temperature of the die and to output a sensed temperature value for the die. A dynamic voltage controller is located on the die and is configured to receive the sensed temperature value for the die and to identify a technology process category of the die. Based on the sensed temperature value and the identified technology process category of the die, the dynamic voltage controller adjusts an output voltage to at least one circuit of the die.