Dynamic Voltage Scaling for IC Power Efficiency
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Solution Overview
Problem
Existing power delivery systems for integrated circuits lack efficient control over supply voltage based on the power state of the circuit, leading to suboptimal power consumption and performance.
Innovation Solution
The implementation of voltage regulator control logic that adjusts supply voltage based on the current load and power state of the integrated circuit, using switching voltage regulator circuitry and power control logic to optimize power delivery and reduce consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If supply voltage is increased to improve performance, then processing speed and functionality are enhanced, but power consumption increases
Solution Approach 1:
The patent implements dynamic voltage scaling by adjusting the supply voltage to the integrated circuit based on the power state of the hard disk drive. The voltage regulator receives control signals indicating the power state (e.g., idle, active, standby) and dynamically adjusts the output voltage accordingly, allowing the system to optimize between performance and power consumption in real-time
Solution Approach 2:
The system changes the voltage parameter of the integrated circuit based on operational requirements. By monitoring the power state and adjusting the supply voltage parameter dynamically, the system achieves lower power consumption during idle periods while maintaining sufficient voltage for high-performance operations when needed
2Loss of energy
If supply voltage is decreased to reduce power consumption, then energy efficiency improves, but performance and reliability deteriorate
Solution Approach 1:
The voltage regulator incorporates feedback control by receiving power state information from the hard disk drive controller and adjusting the supply voltage accordingly. This closed-loop approach ensures that voltage is reduced only when the system is in low-power states, maintaining performance stability during active operations while achieving energy savings during idle periods
Solution Approach 2:
The system dynamically adapts the voltage level to match the operational demands of the integrated circuit. By transitioning between different voltage levels based on power state, the system maintains reliability during high-performance modes while optimizing energy efficiency during low-activity modes
3Loss of energy
If voltage regulator control logic is added to dynamically adjust supply voltage, then power efficiency improves, but device complexity increases
Solution Approach 1:
The voltage regulator control logic is designed to handle multiple power states and voltage levels through a unified control mechanism. The same control circuitry manages transitions between idle, active, and standby states, reducing the need for separate control logic for each state and thereby minimizing overall device complexity
Solution Approach 2:
The system employs self-service control where the voltage regulator automatically adjusts supply voltage based on power state feedback from the hard disk drive controller. This autonomous operation eliminates the need for complex external control mechanisms, achieving power efficiency through a relatively simple integrated control solution
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 enhances power efficiency by dynamically adjusting voltages according to the power state, reducing power consumption and minimizing performance impact, while maintaining sufficient power supply over varying conditions.
Implementation Method 1
switching voltage regulator circuitry coupled to receive power from a power supply to supply one or more voltages to at least a portion of the integrated circuit
Data Source
AI summary
Disclosed is a switching voltage regulator circuitry controlled to supply a voltage to at least a portion of an integrated circuit (IC). Information corresponding to a current load for a different power state of at least a portion of the IC is received. The switching voltage regulator circuitry is controlled to adjust the voltage to a different value based at least in part on the received information. Disclosed is a voltage received for a power state of at least a portion of an IC having first logic to perform one or more functions and second logic integrated with the first logic. Information corresponding to a current load for a different power state of at least a portion of the IC is sent from the second logic to voltage regulator control logic to adjust the voltage to a different value.