Boosting Capacitor Level Shifting Without a High-Voltage Source

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Solution Overview

Problem

Conventional level shifting circuits require both a low power source and a high power source, increasing the complexity of circuit design.

Innovation Solution

A level shifting circuit utilizing a low power source and a boosting capacitor circuit to generate a high voltage twice the value of the low power source, eliminating the need for a high power source.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If a conventional level shifting circuit uses both low power source and high power source, then voltage conversion from low voltage to high voltage is achieved, but circuit design complexity increases

Engineering Contradiction:

Improvevoltage conversion capabilityVSAvoidcircuit design complexity

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The patent extracts and removes the high power source from the conventional level shifting circuit, retaining only the low power source. The high voltage generation function is achieved through a voltage doubling circuit composed of capacitors and switching devices, thereby simplifying the circuit structure by eliminating one power source while maintaining the voltage conversion capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the operating parameters of the circuit by using a single low power source voltage (e.g., 1.8V) and employing capacitive energy storage and switching to generate doubled voltage (e.g., 3.6V). This parameter transformation approach replaces the need for a separate high power source, reducing circuit complexity while achieving the required voltage level

Inventive Principle:

Principle #35Parameter changes

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

Simplifies circuit design by generating a high voltage equivalent to existing circuits using only a low power source, achieving comparable voltage conversion without the need for an additional high power source.

Implementation Method 1

a boosting capacitor circuit is provided between the inverter and the voltage conversion circuit, the boosting capacitor circuit controls the current flow from the low power source to the voltage conversion circuit, and generates a converted high voltage that is twice the voltage value of the low power source

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS20250337398A1Level shifting circuit and level shifting circuit and level shifting method based on low power source

Publication Date: 2025.10.30 SUZHOU MI TU OPTOELECTRONIC TECH CO LTD

AI summary

The present application provides a level shifting circuit and level shifting method based on low power source, belonging to the field of circuit design. The level shifting circuit comprising low power source, inverter and voltage conversion circuit. The low power source is connected to the power terminal of the inverter. A boosting capacitor circuit is provided between the inverter and the voltage conversion circuit. The boosting capacitor circuit controls the current flow from the low power source to the voltage conversion circuit, and generates a converted high voltage that is twice the voltage value of the low power source. It outputs the converted high voltage through the voltage conversion circuit. This solution uses only a low power source without the need for a high power source and utilizes the boosting capacitor circuit to generate a converted high voltage that is twice the voltage value of the low power source. This realizes level shifting from low voltage to high voltage, omits the high voltage source, and simplifies the circuit design.