Voltage Converter Current Mirror Bias Circuit Noise Reduction

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Solution Overview

Problem

Existing voltage converters face challenges in selecting and controlling bias voltage signals, which are prone to noise interference, affecting their performance.

Innovation Solution

A voltage converter design incorporating a current mirror circuit, switch circuit, and bias circuit, where a bias current signal is used to control the switch circuit, allowing for precise voltage output adjustments and reduced noise sensitivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If bias voltage signals are provided through bias voltage wiring, then the voltage converter can control bias voltage, but it is difficult to select and control magnitudes of bias voltage signals and they are easily interfered by noise

Engineering Contradiction:

Improvenoise resistanceVSAvoidcontrol difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the voltage-based control system with a current-based control system. Specifically, it uses a current mirror circuit to mirror a reference current, generating a bias current that is then converted to bias voltage through a resistor. This substitution of voltage control with current control eliminates noise interference and simplifies magnitude selection, as current magnitudes can be precisely controlled through the current mirror circuit without being susceptible to noise.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If bias voltage signals are provided through bias voltage wiring, then the voltage converter can maintain operation, but the performance of the voltage converter is affected due to noise interference

Engineering Contradiction:

Improveoperational capabilityVSAvoidperformance stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If current mirror circuit is turned on, then the output voltage can be adjusted, but the first current signal is consumed by the current mirror circuit

Engineering Contradiction:

Improvevoltage adjustment capabilityVSAvoidcurrent signal loss

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The patent introduces a switch circuit that dynamically controls the connection between the first current end and the current mirror circuit. The switch is controlled by a control signal that determines when the current mirror circuit should be active. This dynamic switching allows the system to adjust output voltage when needed while minimizing current consumption by keeping the current mirror circuit off during periods when voltage adjustment is not required.

Inventive Principle:

Principle #15Dynamics

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 configuration improves the stability and performance of the voltage converter by reducing noise interference and enabling easier control of bias signals, resulting in improved voltage regulation.

Implementation Method 1

a current mirror circuit, wherein a first end of the current mirror circuit is electrically connected to a first current end providing a first current signal

Methodology Applied

Scientific EffectCurrent mirror effect:

Implementation Method 2

the bias circuit is electrically connected between a bias current end and a ground end, and the bias current end provides a bias current signal, to raise a substrate voltage of the switch circuit while the bias circuit is turned on

Methodology Applied

Scientific EffectElectrical conduction and voltage potential: Conduction (electrical)

Implementation Method 3

the first current signal is shunted by the switch circuit, which results in turning off of the current mirror circuit

Methodology Applied

Scientific EffectElectrical conduction and current routing: Conduction (electrical)

Data Source

PatentUS11614762B2Voltage converter

Publication Date: 2023.03.28 SHANGHAI SEEO OPTRONICS TECH CO LTD

AI summary

A voltage converter comprises a current mirror circuit, a switch circuit, and a bias circuit electrically connected to a substrate of the switch circuit. When an electrical signal provided by the first electrical signal end is greater than an electrical signal provided by the second electrical signal end, the bias circuit is turned on to turn on the switch circuit, thereby an output end of the mirror current circuit outputs the electrical signal provided by the second electrical signal end. Otherwise, the output end of the current mirror circuit outputs the second voltage signal.