Localized Voltage Regulation for Integrated Circuit Power Management
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Solution Overview
Problem
Voltage scaling in integrated circuits is limited by the complexity of multi-voltage power supplies and routability issues, as well as wake-up time delays when circuits need to transition from idle to operational state.
Innovation Solution
A system that dynamically adjusts the supply voltage to localized regions of an integrated circuit using a voltage selector, comparators, and adjustable devices to maintain optimal voltage levels, allowing for multiple virtual power rails without separate distribution networks and minimizing wake-up latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If voltage scaling is applied to minimize power dissipation, then power consumption is reduced, but the complexity of multi-voltage power supplies and routability issues increase
Solution Approach 1:
The patent divides the integrated circuit into multiple localized regions, each with its own voltage regulator that can independently adjust voltage levels. This segmentation allows each region to operate at optimal voltage for power efficiency while avoiding the need for complex global multi-voltage power supply infrastructure.
Solution Approach 2:
The patent implements local voltage regulation where each localized region has its own voltage control mechanism tailored to its specific power requirements. This local quality approach enables precise voltage optimization for power dissipation reduction without requiring complex system-wide voltage management.
2Loss of energy
If voltage is reduced for idle circuits to save power, then power consumption decreases, but wake-up time increases due to slow voltage ramp-up
Solution Approach 1:
The voltage regulator includes a storage element that pre-charges or pre-prepares the voltage level before it is needed. When wake-up is required, the stored energy enables rapid voltage restoration without waiting for slow ramp-up from the power supply, thus reducing wake-up time while maintaining low idle power consumption.
Solution Approach 2:
The localized voltage regulator serves the idle circuit by maintaining readiness through local energy storage. The system essentially serves itself by having each local region prepare its own voltage requirements independently, enabling fast wake-up without burdening the global power supply system.
3Adaptability or versatility
If multiple separate power distribution networks are used to support multiple voltage levels, then voltage flexibility is improved, but device complexity and routing difficulty increase
Solution Approach 1:
The patent employs a universal voltage regulator design that can be replicated across multiple localized regions, each handling its own voltage regulation independently. This multi-functional approach provides voltage flexibility for different regions while using a standardized, manageable regulator architecture rather than complex separate power distribution networks.
Solution Approach 2:
The patent combines the voltage selection and regulation functions into integrated localized regulators that operate autonomously. By merging these functions at the local level, the system achieves voltage flexibility without requiring complex global power distribution infrastructure, as each region manages its own voltage needs independently.
Data Source
AI summary
System and method system for regulating voltage in a portion of an integrated circuit. An integrated circuit has a voltage input and at least a portion that is less than all of the integrated circuit, which requires a local voltage level. A voltage selector establishes a target voltage for the portion. A first comparator compares the target voltage to the local voltage and generates a pull up control signal when the local voltage is below the target voltage. A second comparator compares the target voltage to the local voltage and generates a pull down control signal when the local voltage is above the target voltage. A pull up device, responsive to the pull up control signal, increases the local voltage according to the pull up control signal. A pull down device, responsive to the pull down control signal, decreases the local voltage level according to the pull down control signal.