Charge Recycling Capacitor Circuit for Leakage Power Reduction

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Solution Overview

Problem

Electronic circuits face inefficiencies due to power consumption issues, particularly as device size decreases and quantum tunneling leads to current leakage, necessitating a cost-effective and efficient method to optimize power usage.

Innovation Solution

An apparatus and method utilizing switched capacitors in electronic circuits to collect and discharge current charges, alternating between charge collection and discharge modes to recycle and reuse power, thereby reducing overall power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If device size is decreased to improve integration, then miniaturization is achieved, but quantum tunneling occurs causing current leakage and increased power consumption

Engineering Contradiction:
Improvedevice sizeVSAvoidpower consumption
Core Design Contradiction:
Volume of moving objectVSLoss of energy

Solution Approach 1:

The patent converts the harmful effect of quantum tunneling-induced current leakage into a beneficial resource by capturing the leaked current through capacitors and redirecting it back to the power supply, thereby transforming energy loss into reusable energy

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent implements a charge recovery mechanism where capacitors capture discarded leaked current that would otherwise be lost, store it temporarily, and return it to the power supply for reuse, preventing waste of electrical energy

Inventive Principle:
Principle #34Discarding and recovering

2Reliability

If conventional power consumption methods are used, then circuit operation is maintained, but power consumption is high due to current leakage

Engineering Contradiction:
Improvecircuit operationVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The patent implements a feedback mechanism where the electrical switches continuously monitor and redirect leaked current back to the power supply, creating a closed-loop system that reduces net power consumption while maintaining circuit operation

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The circuit serves itself by capturing and recycling its own leaked current through the capacitor-switch network, reducing dependence on external power sources and minimizing energy waste

Inventive Principle:
Principle #25Self-service

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 effectively reduces power consumption by approximately 50% in electronic systems by continuously recycling and reusing current charges, maintaining system operation while minimizing energy loss.

Implementation Method 1

at least one capacitor coupled to a circuit block in an electronic circuit... the at least one capacitor being configured to collect current charge consumed by the circuit block

Methodology Applied
Scientific EffectCapacitance: Capacitance

Implementation Method 2

detection means configured to detect a fully charged state in the at least one capacitor when the at least one capacitor is fully charged

Methodology Applied
Scientific EffectVoltage detection: Electric Field

Data Source

PatentUS8148953B2Apparatus and method for recycling and reusing charge in an electronic circuit
Publication Date: 2012.04.03 GLOBALFOUNDRIES US INC
  • US8148953B2 patent drawing
  • US8148953B2 patent drawing
  • US8148953B2 patent drawing

AI summary

An apparatus and method for recycling and reusing charge in an electronic circuit. The apparatus includes at least one capacitor coupled to a circuit block in the electronic circuit, the capacitor being configured to collect current charge consumed by the circuit block when set to a charge collection mode, and a voltage level comparator configured to detect a fully charged state when the capacitor is fully charged. Further, the apparatus includes a first electrical switch configured to allow, once the fully charged state is detected, the capacitor to switch to a discharge mode for discharging the current charge collected back into the power supply for reuse by the electrical system and a second switch configured to allow, after the capacitor has fully discharged the current charge collected, the capacitor to switch back to the charge collection mode, such that, the current charge is recycled and reused by the electrical system.