Dynamic Clock Regulation via Duty Cycle Thresholds
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Solution Overview
Problem
Integrated circuits operating at high clock speeds face increased power consumption and heat generation, leading to reliability issues and higher costs due to the need for better packaging and heat sinks, as they cannot sustain continuous operation at design frequency over extended periods.
Innovation Solution
A method and system for dynamically controlling clock frequencies based on cumulative duty cycles, adjusting frequencies and load thresholds to balance performance and power consumption, including configuring a frequency control subsystem to manage clock frequencies according to current utilization and temperature monitoring, allowing for reduced frequencies when cumulative duty cycles exceed certain thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the clock frequency is increased to provide higher performance, then the processing speed and productivity are improved, but the power consumption and heat generation increase
Solution Approach 1:
The patent implements dynamic clock frequency regulation that adjusts the operating frequency based on cumulative duty cycle thresholds. The system transitions between different frequency states (first frequency value when cumulative DC is below threshold, second frequency value when above threshold) to optimize the balance between processing performance and power consumption, rather than operating at a fixed high frequency
Solution Approach 2:
The system changes the operational parameters by monitoring cumulative duty cycle and adjusting clock frequency accordingly. When cumulative DC exceeds the threshold, the system reduces frequency from the first value to the second value, effectively changing operational parameters to reduce power consumption while maintaining reliability
2Productivity
If the clock frequency is increased to provide higher performance, then the processing speed is improved, but the temperature increases leading to reliability issues
Solution Approach 1:
The system dynamically adjusts clock frequency based on cumulative duty cycle to prevent excessive temperature buildup. By reducing frequency when cumulative DC exceeds thresholds, the system limits heat generation and maintains operational reliability without requiring more aggressive cooling solutions
Solution Approach 2:
The system takes preliminary action by monitoring cumulative duty cycle and proactively reducing clock frequency before temperature reaches critical levels. This preventive approach avoids overheating and reliability issues by adjusting frequency in advance based on usage patterns rather than reacting to temperature extremes
3Productivity
If the chip operates continuously at design frequency, then maximum performance is achieved, but the operational lifespan decreases due to reliability issues
Solution Approach 1:
The system implements periodic duty cycle monitoring and frequency adjustment. By operating at high frequency intermittently (when cumulative DC is below threshold) and reducing frequency periodically (when cumulative DC exceeds threshold), the system extends operational lifespan while maintaining acceptable performance levels
Solution Approach 2:
The dynamic frequency regulation based on cumulative duty cycle allows the system to adapt its operating characteristics over time, extending the operational lifespan by preventing continuous high-stress operation while maintaining performance during acceptable usage periods
4Temperature
If better packages and heat sinks are used to manage heat, then the temperature control is improved, but the device cost increases
Solution Approach 1:
The system uses its own operational data (cumulative duty cycle) to self-regulate frequency and manage heat generation internally, eliminating the need for expensive external cooling infrastructure. The chip essentially manages its own thermal profile through intelligent frequency control
Solution Approach 2:
The patent replaces mechanical/physical cooling solutions (heat sinks, improved packaging) with a software/control-based frequency regulation mechanism. By substituting thermal management hardware with intelligent frequency control, the system achieves temperature management without increasing device cost
Data Source
AI summary
A clock frequency is controlled by determining a cumulative duty cycle according to a ratio of a cumulative time, during an interval, that the clock frequency has a frequency greater than or equal to a design frequency threshold value to a duration of the interval. A frequency of the clock frequency is controlled to be a first frequency value when the cumulative duty cycle is less than a first duty cycle threshold; and controlled to be a second frequency value substantially less than the first frequency value when the cumulative duty cycle is greater than a second duty cycle threshold. The second duty cycle threshold is greater than or equal to the first duty cycle threshold.