Active Optical Cable Linear Amplifier Sleep Control
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Solution Overview
Problem
Existing communication devices in active optical cables face challenges in achieving high-speed data transmission due to increased load capacity at the output terminal, which is exacerbated by the use of limiting amplifiers, and insufficient power consumption reduction when using linear amplifiers.
Innovation Solution
The communication device employs a differential input termination resistor with variable resistance, a linear laser driver, a linear transimpedance amplifier, a linear variable gain amplifier, a linear output driver, a pulse counter, and a controller to manage transitions between active and sleep states based on electrical idle detection, reducing power consumption while maintaining high-speed communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If limiting amplifiers are used in the communication device, then high-speed signal transmission is achieved, but the load capacity at the output terminal increases
Solution Approach 1:
The patent implements dynamic state transitions between active and sleep modes based on electrical idle detection. The controller monitors signal activity and dynamically adjusts the operational state of the communication device, reducing output terminal load during idle periods while maintaining high-speed capability when data transmission is required. This dynamic adaptation resolves the contradiction by making the system flexible rather than statically burdened.
Solution Approach 2:
The patent employs periodic electrical idle detection to determine when to transition between active and sleep states. By periodically monitoring the signal state and switching operations accordingly, the system achieves high-speed transmission when needed while reducing output load during idle intervals, thus resolving the load capacity issue without sacrificing transmission speed capability.
2Use of energy by moving object
If linear amplifiers are used to reduce power consumption, then power consumption is reduced, but the ability to maintain high-speed communication is compromised
Solution Approach 1:
The patent uses dynamic state transitions between active and sleep modes based on electrical idle detection. During active periods, the full-performance mode maintains high-speed communication capability. During idle periods detected through electrical idle monitoring, the system transitions to sleep mode to reduce power consumption. This dynamic approach resolves the contradiction by adapting power usage to actual communication needs.
Solution Approach 2:
The patent implements feedback through electrical idle detection that monitors signal activity and provides information to the controller. This feedback mechanism enables the system to automatically adjust its operational state - maintaining high-speed mode when communication is active and switching to low-power mode when idle - thus resolving the contradiction between power consumption and communication speed by making power usage responsive to actual demand.
3Speed
If the communication device operates continuously in active state, then high-speed communication is maintained, but power consumption increases
Solution Approach 1:
The patent employs periodic electrical idle detection to determine when to transition between active and sleep states. By periodically monitoring whether communication is actually occurring and switching to sleep mode during idle intervals, the system maintains high-speed capability when needed while dramatically reducing power consumption during non-communication periods, thus resolving the contradiction between continuous operation and power efficiency.
Solution Approach 2:
The patent implements self-service through automatic state transitions based on electrical idle detection. The system monitors its own operational state and autonomously switches between active and sleep modes without external intervention. This self-managed approach ensures high-speed communication is maintained when needed while automatically reducing power consumption during idle periods, resolving the contradiction without requiring continuous external control.
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 enables high-speed communication and reduces power consumption by dynamically controlling the device's operational states, optimizing signal transmission and power usage based on electrical idle detection and input termination resistance.
Implementation Method 1
A laser diode and a photodiode are used on a first terminal side and a second terminal side, respectively
Implementation Method 2
A laser diode and a photodiode are used on a first terminal side and a second terminal side, respectively
Data Source
AI summary
A communication device includes a controller, a differential input termination resistor, a linear laser driver, transmitted signal detector, a linear transimpedance amplifier, a linear variable gain amplifier, a linear output driver, a pulse counter, a received signal detector, and an amplitude detector. The controller outputs a Term signal for setting a resistance value of the differential input termination resistor, a TxEN signal and an LS signal for controlling an operation of the linear laser driver, an RxEN signal for controlling operations of the linear TIA, the linear VGA, and the linear output driver, and a GCTL signal for controlling a gain of the linear VGA.