Dynamic Feedback Charge Pump Voltage Ripple Reduction

Solution Overview

Problem

Conventional charge pumps face issues with output voltage ripple due to load variations, as they cannot detect and regulate input voltage in real time, leading to inefficiencies and increased costs with the addition of regulator capacitors.

Innovation Solution

A dynamic feedback control charge pump apparatus that integrates a voltage regulator, charge pump, and feedback unit, where the feedback unit dynamically detects and feeds back the output voltage to the voltage regulator, allowing real-time response to load changes without additional components or costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a voltage regulator circuit is used to regulate the output voltage of a conventional charge pump, then the output voltage stability is improved, but the device complexity and cost increase due to additional regulator capacitors and components

Engineering Contradiction:

Improveoutput voltage stabilityVSAvoidcircuit complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent combines the voltage regulator and charge pump into a single integrated circuit device. The regulator unit and charge pump unit share common components such as capacitors and switches, merging their functions into one unified structure that reduces overall component count and complexity while maintaining voltage stability and charge pumping functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated circuit is designed to perform multiple functions: the same capacitors and switches are used for both voltage regulation and charge pumping operations. The regulator unit and charge pump unit share common resources, allowing the device to achieve both voltage stability and voltage multiplication without requiring separate dedicated components for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Stability of the object's composition

If a voltage regulator circuit is added to a conventional charge pump, then the output voltage regulation is improved, but the manufacturing cost increases due to additional components

Engineering Contradiction:

Improveoutput voltage regulationVSAvoidmanufacturing cost

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent combines the voltage regulator and charge pump into a single integrated circuit device. The regulator unit and charge pump unit share common components such as capacitors and switches, merging their functions into one unified structure that reduces overall component count and complexity while maintaining voltage stability and charge pumping functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated circuit is designed to perform multiple functions: the same capacitors and switches are used for both voltage regulation and charge pumping operations. The regulator unit and charge pump unit share common resources, allowing the device to achieve both voltage stability and voltage multiplication without requiring separate dedicated components for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If the charge pump input is directly coupled to the system voltage without a voltage regulator, then the device complexity is reduced, but the output voltage ripple increases under load variations

Engineering Contradiction:

Improvecircuit complexityVSAvoidoutput voltage ripple

Core Design Contradiction:

Device complexityVSStability of the object's composition

Solution Approach 1:

The patent implements a feedback mechanism where the output of the charge pump is fed back to the input of the voltage regulator. This feedback loop allows the regulator to dynamically adjust the input voltage to the charge pump based on output conditions, maintaining stable operation and reducing voltage ripple under varying load conditions without requiring complex external regulation circuits

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS7764525B2Apparatus of dynamic feedback control charge pump

Publication Date: 2010.07.27 NOVATEK MICROELECTRONICS CORP

AI summary

An apparatus of dynamic feedback control charge pump is provided. The apparatus of dynamic feedback control charge pump receives an input voltage through a voltage regulator. The voltage regulator regulates the input voltage to a base voltage according to a control signal. The charge pump receives the base voltage and provides multiple of the base voltage to an output voltage. A feedback unit provides the control signal to the voltage regulator according to the output voltage.