Communication Terminal Current-Voltage Converter for Low Impedance Lines
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Solution Overview
Problem
Existing communication systems with a base unit connected to multiple communication terminals via a two-wire line face challenges in transmitting high-volume data due to slow communication speed and low reliability, particularly when introducing new communication terminals that require high impedance modules, which complicates site examination and installation.
Innovation Solution
A communication system that includes a power supply device and a current/voltage converter to convert current changes on the communication line to voltage changes, allowing communication terminals to transmit primary signals as current signals and receive secondary signals as voltage signals, utilizing the communication line's characteristic impedance as a resistance component, thereby facilitating communication even with low impedance lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If communication terminals are connected via a base unit using voltage signals, then communication can be performed with established terminals, but communication speed is slow and reliability is low for high-volume data transmission
Solution Approach 1:
The patent introduces a current/voltage converter as an intermediary device that converts voltage signals from existing terminals into current signals. This mediator enables compatibility between old voltage-based terminals and new current-based communication methods, allowing fast direct communication while maintaining compatibility with established infrastructure.
Solution Approach 2:
The patent changes the signal parameter from voltage to current for communication terminals. By using current signals instead of voltage signals, the system achieves faster communication speeds and better reliability for high-volume data transmission, while the current/voltage converter allows coexistence with legacy voltage-based terminals.
2Adaptability or versatility
If high impedance modules are connected to existing terminals to enable current signal communication, then communication between new terminals is possible, but site examination and installation become complicated
Solution Approach 1:
The current/voltage converter serves as an intermediary that simplifies installation by handling the impedance conversion automatically. Instead of requiring contractors to manually examine sites and connect high impedance modules to each terminal, the converter is integrated into the system and automatically adapts signals, reducing installation complexity while maintaining compatibility.
Solution Approach 2:
The current/voltage converter performs automatic signal conversion without requiring manual site examination or complex configuration. The system self-adapts to existing terminals, eliminating the need for contractors to manually determine which terminals need high impedance modules, thereby simplifying the installation process.
3Reliability
If voltage signals are used for communication on two-wire lines, then existing terminals can communicate, but the impedance of low impedance terminals affects signal quality and communication reliability
Solution Approach 1:
The patent changes the signal parameter from voltage to current, which fundamentally alters how signals interact with terminal impedances. Current signals are less affected by impedance variations, improving signal transmission reliability. The current/voltage converter enables this parameter change while maintaining compatibility with existing voltage-based infrastructure.
Solution Approach 2:
The current/voltage converter acts as an intermediary that isolates the communication signal from impedance issues. By converting voltage signals to current signals, it prevents low impedance terminals from degrading signal quality, thereby improving transmission reliability without requiring complex impedance matching circuits.
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 solution enables efficient communication between terminals with low impedance lines, reducing the complexity and labor required for site examination and installation, while maintaining high transmission quality over extended distances.
Implementation Method 1
a current/voltage converter configured to convert change of current on the communication line to change of voltage on the communication line by a voltage drop by a resistance component
Data Source
AI summary
A transmitting circuit is connected to a communication line and configured to transmit a primary signal, being a current signal, to the communication line by changing a current flowing from a transmission unit via the communication line. A receiving circuit is configured to receive a secondary signal which is generated by converting the primary signal transmitted from the transmitting circuit to a voltage signal by a current/voltage converter provided between the transmission unit and the communication line. Specifically, the primary signal, being a current signal transmitted from a communication terminal, is converted to the secondary signal being a voltage signal by the current/voltage converter. As a result, communication can be performed even when the impedance of the communication line is reduced, facilitating introduction of a communication system.