Bus Signal Extraction Device With Dynamic Impedance Compensation
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Solution Overview
Problem
Existing two-wire bus systems combine supply and data signals, leading to inefficiencies and limitations in connecting multiple bus apparatuses without distorting data signals, as existing power supply decouplers are either inefficient or unable to handle a large number of simultaneous connections.
Innovation Solution
A device with a conversion circuit to extract current for a voltage signal and a compensation circuit that adjusts impedance when current drops, using a dummy load to compensate for current fluctuations and minimize data signal distortion, allowing for the simultaneous connection of many bus apparatuses without adverse effects on data signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing power supply decouplers are used to separate supply signal from data signal, then supply signal extraction is achieved, but data signal distortion occurs and the number of simultaneous bus apparatus connections is limited
Solution Approach 1:
The patent implements a dynamic impedance adjustment mechanism where the compensation circuit continuously monitors the current flowing through the bus and dynamically modifies the impedance of the decoupler circuit accordingly. When current decreases (indicating data signal modulation), the compensation circuit automatically adjusts impedance to maintain signal integrity, enabling both high reliability and support for multiple simultaneous connections without the static limitations of conventional decouplers
Solution Approach 2:
The patent employs a feedback mechanism where the compensation circuit receives information about the actual current flow through the bus and uses this feedback to adjust the impedance in real-time. This closed-loop control ensures that the decoupler adapts to varying load conditions and maintains optimal performance for data signal separation even when multiple bus apparatuses are connected simultaneously
2Use of energy by moving object
If current is extracted from the bus for power supply, then power supply efficiency is improved, but data signal modulation is distorted when current drops below threshold
Solution Approach 1:
The compensation circuit performs preliminary anti-action by detecting when the current extracted from the bus approaches levels that would cause signal distortion, and proactively adjusts the impedance before significant distortion occurs. This preventive mechanism allows efficient power extraction while maintaining data signal integrity by counteracting potential distortion effects before they degrade signal quality
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
The solution effectively separates supply and data signals, enabling a large number of bus apparatuses to connect to the bus system without distorting data signals, ensuring stable power supply and efficient energy use.
Implementation Method 1
a conversion circuit (420, 421) adapted and connected to the first and second inputs (431, 432) such that a current is extracted from the bus for the purpose of providing a voltage signal to a linear or switching power supply (522)
Implementation Method 2
a compensation circuit (423, 424, 523, 524) adapted to change the impedance when the current extracted from the bus falls below a determined threshold
Implementation Method 3
This dummy load will then draw additional current at the moment the current extracted from the bus has fallen below a determined threshold
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3C
AI summary
Device for extracting a supply signal from a bus signal, wherein the device has an impedance between the first and second input thereof, and comprises a conversion circuit adapted and connected to the first and second inputs such that a current is extracted from the bus for the purpose of providing a voltage signal to a linear or switching power supply; and a compensation circuit adapted to change the impedance when the current extracted from the bus falls below a determined threshold.