Regulator Input Current Scaling for Low-Power Activity Bursts

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In low-power applications like activity trackers and pedometers, existing regulators face challenges in dynamically scaling current consumption efficiently to balance performance and power savings, as computational activity varies over time, leading to suboptimal power management.

Innovation Solution

A system with a controller that determines activity duration and threshold to dynamically scale the current supplied to a regulator, either reducing or maintaining the current level based on activity duration and standby periods, thereby optimizing power usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If current supplied to regulator is reduced to achieve power savings, then power consumption decreases, but voltage stability and performance may be compromised during computational activity

Engineering Contradiction:

Improvepower consumptionVSAvoidvoltage stability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent implements dynamic current scaling that adjusts the current supplied to the regulator based on real-time detection of computational activity duration. The system transitions from static current supply to dynamic adjustment, scaling current down during idle periods and maintaining higher current during active computational periods, thus resolving the contradiction between power savings and voltage stability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the current parameter dynamically based on activity duration thresholds. By monitoring the duration of computational activity and comparing it against predefined thresholds, the system adjusts current levels appropriately, achieving power savings during low-activity states while ensuring voltage stability during high-activity states

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If current is dynamically scaled down during standby periods, then average power consumption decreases, but response time to restore current during activity may increase

Engineering Contradiction:

Improveaverage power consumptionVSAvoidcurrent restoration time

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The system performs preliminary detection of activity duration and makes current scaling decisions before significant computational activity begins or ends. By monitoring activity duration in real-time and comparing against thresholds, the system proactively adjusts current levels, avoiding delays in current restoration when activity resumes

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements a feedback mechanism that continuously monitors computational activity duration and uses this information to adjust current scaling decisions. The feedback loop ensures that current is restored promptly when activity duration exceeds thresholds, minimizing response time while maintaining power savings during idle periods

Inventive Principle:

Principle #23Feedback

3Use of energy by moving object

If current scaling is applied continuously, then power savings are maximized, but system complexity and control overhead increase

Engineering Contradiction:

Improvepower savingsVSAvoidcontrol complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent segments the operation into distinct phases based on activity duration thresholds: active phase, transition phase, and idle phase. By dividing the continuous operation into discrete segments with different current scaling strategies, the system achieves power savings without requiring complex continuous control mechanisms

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system applies current scaling partially rather than continuously - only during idle periods when activity duration falls below thresholds. This partial action approach achieves significant power savings while avoiding the complexity of continuous monitoring and adjustment mechanisms

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20230367342A1Dynamic current scaling of a regulator

Publication Date: 2023.11.16 STMICROELECTRONICS SRL

AI summary

A method and apparatus for performing dynamic current scaling of an input current of a voltage regulator are provided. The method and apparatus allow tuning current consumption in various applications, calculating a duration of an activity phase in which various algorithms are executed and activating dynamic current scaling of a regulator if the activity duration is shorter than a programmable threshold. A controller receives a threshold for an activity duration and a window size in which to evaluate the activity duration.