Adaptive Voltage Scaling Circuit for DC-DC Power Optimization
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Solution Overview
Problem
Existing power saving techniques in high-performance integrated circuits, such as fixed voltage reduction and clock frequency adjustment, are limited in their effectiveness for various use cases, presenting unique challenges for power savings.
Innovation Solution
A method and apparatus that monitor parameters associated with device performance driven by a DC-DC converter, determine a voltage target based on these parameters, and selectively adjust the output voltage via a feedback loop by comparing the voltage target to the power supply voltage, using an adaptive voltage scaling (AVS) controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If fixed voltage reduction is used to save power, then power consumption is reduced, but device performance may deteriorate
Solution Approach 1:
The patent implements dynamic voltage scaling by continuously monitoring device performance parameters (such as clock frequency, temperature, and workload) and adjusting the voltage output of the DC-DC converter in real-time. This replaces fixed voltage reduction with an adaptive system that dynamically optimizes the voltage level to maintain performance while minimizing power consumption.
Solution Approach 2:
The system employs feedback control mechanisms where performance metrics are monitored and fed back to the voltage control circuit. Based on this feedback, the controller adjusts the voltage target and consequently the DC-DC converter output to maintain optimal operation, ensuring that power savings do not compromise device performance.
2Use of energy by moving object
If clock frequency adjustment is used to save power, then power consumption is reduced, but operational flexibility is limited
Solution Approach 1:
Instead of adjusting clock frequency, the patent changes the voltage parameter output by the DC-DC converter to achieve power savings. By varying voltage levels while maintaining stable clock operation, the system achieves power optimization without limiting operational flexibility or requiring frequency scaling.
3Use of energy by moving object
If voltage is set at fixed value lower than operating voltage, then power savings are achieved, but adaptability to varying conditions is reduced
Solution Approach 1:
The system transitions from fixed voltage setting to dynamic voltage adjustment by implementing real-time monitoring of device parameters and continuously adapting the voltage output of the DC-DC converter. This enables the system to achieve power savings while remaining adaptable to varying operational conditions, workloads, and environmental factors.
Solution Approach 2:
The voltage control system operates autonomously by self-monitoring device performance and self-adjusting the voltage level without external intervention. The controller automatically determines the optimal voltage target based on monitored parameters, enabling the system to adapt to varying conditions while maintaining power efficiency.
Data Source
AI summary
A versatile adaptive voltage scaling control circuit, related apparatus, and related method are provided. A method includes monitoring one or more parameters determined to be associated with performance of a device that is driven by a direct current-to-direct current (DC-DC) converter. The method also includes determining a voltage target based on the one or more parameters and comparing the voltage target to a power supply voltage. Further, the method includes selectively adjusting an output voltage of the DC-DC converter via a feedback loop based on a result of the comparing.