Signal Detection Circuit with Adjustable Threshold for LANs
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Solution Overview
Problem
Current signal detection circuits in Local Area Networks (LANs) are costly to set up and have limited detection flexibility due to the use of separate devices and a single threshold comparator, which affects power consumption and detection accuracy.
Innovation Solution
A signal detection circuit comprising a signal conversion module, a threshold control module, and a comparison module that converts reference voltage signals to current signals, allows flexible threshold adjustment, and integrates the circuit into a PHY chip using integrated circuit technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are used to implement signal detection circuit, then detection function is achieved, but setting-up cost is high
Solution Approach 1:
The patent combines multiple signal detection functions into a single integrated circuit device. The signal detection circuit includes a comparator that receives both a reference signal and a detected signal, and generates a single output signal that indicates whether the detected signal exceeds the reference signal. This integration eliminates the need for separate detection devices, thereby reducing setting-up cost while maintaining detection reliability.
2Device complexity
If a single threshold comparator is used, then circuit structure is simple, but detection flexibility is poor
Solution Approach 1:
The patent introduces a dynamic threshold adjustment mechanism where the reference signal can be varied to change the detection threshold. The comparator continuously compares the detected signal against this adjustable reference signal, allowing the detection circuit to adapt to different signal levels and conditions. This dynamic capability enhances detection flexibility without significantly complicating the circuit structure, as the core comparison function remains unchanged.
3Use of energy by moving object
If PHY enters low power consumption mode, then power consumption is reduced, but signal detection capability may be influenced
Solution Approach 1:
The signal detection circuit is designed to operate autonomously with minimal power consumption. The comparator continuously monitors the detected signal against the reference signal and automatically generates an output signal when the detection condition is met, without requiring additional power-intensive processing. This self-service capability allows the PHY to maintain detection functionality in low power consumption mode, ensuring that signal detection capability is preserved while minimizing energy use.
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 improves detection flexibility and reduces setup costs by allowing adjustable thresholds and enhanced noise suppression, while maintaining low power consumption.
Implementation Method 1
a signal conversion module configured to: convert a reference voltage signal into a reference current signal... and convert a voltage signal to be detected into a current signal to be detected
Data Source
AI summary
A signal detection circuit is provided, and includes a signal conversion module, a threshold control module, and a comparison module. The signal conversion module is configured to: convert a reference voltage signal into a reference current signal, and send the reference current signal to the threshold control module; convert a voltage signal to be detected into a current signal to be detected, and send the current signal to be detected to the comparison module. The threshold control module is configured to: generate a threshold current signal according the reference current signal, and send the threshold current signal to the comparison module; and receive a threshold control signal, and change magnitude of the threshold current signal according to the threshold control signal. The comparison module is configured to compare magnitude of the current signal to be detected with the magnitude of the threshold current signal, and output a comparison result.