Termination Resistor Switching for Error-Free Communication Circuits
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Solution Overview
Problem
Existing communication circuits face instability and potential malfunction due to improper switching of termination resistors, leading to communication errors.
Innovation Solution
A communication circuit with a detector and controller that dynamically adjusts the connection and disconnection of termination resistors based on the total resistance value of the transmission path, using a switch to maintain optimal impedance matching without causing communication errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the termination resistor is switched between ON and OFF after communication error is detected, then the communication stability may be compromised, but the attempt to resolve communication issues is made
Solution Approach 1:
The patent applies preliminary action by detecting the total resistance value of the transmission path before switching the termination resistor. The controller measures the resistance and determines whether another termination resistor is already connected, then decides whether to switch the switch. This prevents communication errors by avoiding situations where multiple termination resistors would be connected simultaneously, thus maintaining communication stability while enabling safe switching operation.
2Reliability
If the termination resistor is always connected to the transmission path, then impedance matching is maintained, but the ability to adapt to different communication configurations is reduced
Solution Approach 1:
The patent applies dynamics by making the termination resistor connection state changeable through a switch controlled by the controller. The switch can dynamically transition between connected and disconnected states based on real-time detection of the transmission path's total resistance value. This enables the system to adapt to different communication configurations (single device or multiple devices) while maintaining proper impedance matching by ensuring only one termination resistor is active at any given time.
3Adaptability or versatility
If the switch is used to control termination resistor connection, then adaptability to different communication scenarios is improved, but the risk of communication errors during switching increases
Solution Approach 1:
The patent applies feedback by using the detector to continuously monitor the total resistance value of the transmission path and providing this information to the controller. Based on this feedback, the controller intelligently controls the switch to connect or disconnect the termination resistor. This feedback mechanism ensures that switching operations are performed safely only when appropriate (when no other termination resistor is detected), thereby maintaining high adaptability while preventing communication errors.
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
Enables seamless switching of termination resistors to maintain stable communication without errors, optimizing signal quality and preventing malfunctions.
Implementation Method 1
The detector detects a total resistance value of all resistors connected to the transmission path in a state where the termination resistor and the transmission path are connected
Data Source
AI summary
Connection and disconnection between a termination resistor of a communication circuit and a transmission path are switched without causing a communication error. Communication circuit includes communication part termination resistor switch detector, and controller Communication part is provided in device connected to transmission path, and communicates with another communication part provided in another device connected to transmission path through transmission path. Termination resistor is connected to transmission path. Switch switches between connection and disconnection between termination resistor and transmission path. Detector detects total resistance value of all resistors connected to transmission path in a state where termination resistor and transmission path are connected. Controller controls switching between connection and disconnection between termination resistor and transmission path with switch based on a result of the detection of detector.