Dynamic Termination Resistor Bus System
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Solution Overview
Problem
The increasing functionalization of electronic devices leads to higher data exchange rates, necessitating more efficient high-speed interfaces while also requiring reduced wiring space, which existing technologies have not adequately addressed.
Innovation Solution
A bus system that includes multiple devices, such as imaging devices, connected through a bus that transmits and receives data in a time-division manner, utilizing termination resistors that are dynamically enabled or disabled based on signal amplitude to optimize wiring efficiency and communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple devices are connected through a shared bus interface, then wiring space is reduced, but signal interference and communication quality deteriorate
Solution Approach 1:
The patent applies dynamic termination resistance control where the termination resistor is switched between enabled and disabled states based on the communication phase. During idle periods, the termination resistor is enabled to reduce signal reflections and interference. During active data transmission, it is disabled to ensure proper signal levels. This dynamic adjustment resolves the contradiction by adapting the termination state to current operational requirements, maintaining communication quality while enabling multi-device bus sharing.
Solution Approach 2:
The patent changes the termination resistance parameter dynamically based on communication state. The termination controller adjusts the termination resistor value between two extreme states (enabled/disabled) according to whether devices are transmitting or idle. This parameter change allows the system to optimize signal integrity for different operational conditions, resolving the conflict between wiring space reduction and communication quality maintenance.
2Reliability
If termination resistors are continuously enabled to improve signal quality, then communication quality is maintained, but power consumption increases
Solution Approach 1:
The patent implements periodic action by enabling the termination resistor only during idle periods between data transmissions, rather than continuously. The termination controller monitors the communication state and activates the termination resistor during idle phases when signal reflections may occur, then disables it during active transmission phases. This periodic enabling reduces power consumption compared to continuous operation while maintaining signal quality during critical idle periods.
Solution Approach 2:
The patent applies partial action by enabling the termination resistor only when necessary (during idle periods) rather than continuously. The termination controller selectively activates the termination function based on communication state, providing sufficient termination protection during idle times while avoiding unnecessary power consumption during active data transmission when the driver's output impedance already provides adequate signal control.
3Productivity
If high-speed data transmission is implemented to handle increased data quantity, then data exchange efficiency is improved, but signal integrity and interference resistance worsen
Solution Approach 1:
The patent uses dynamic termination control to adapt to high-speed transmission requirements. By switching the termination resistor state based on communication phase (enabled during idle, disabled during active transmission), the system maintains signal integrity at high speeds while enabling efficient data exchange. The dynamic adjustment prevents signal reflections during idle periods that would be more problematic at higher speeds, while avoiding interference during active high-speed data transmission.
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 approach reduces wiring space and enhances communication quality by enabling termination resistors only when necessary, thereby improving data transmission efficiency and reducing power consumption.
Implementation Method 1
a termination resistor settable to be enabled or disabled... the termination resistor is enabled in a period in which an amplitude value of a signal at an output terminal of the driver is within a predetermined range
Data Source
AI summary
A bus system of the disclosure includes three or more devices that include one or a plurality of imaging devices, and transmit or receive data signals in a time-division manner; and a bus to which the three or more devices are coupled.