Edge-Based Loss-of-Signal Detection Mechanism
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Solution Overview
Problem
Conventional LOS detection mechanisms in electronic systems consume significant power and cannot determine whether a received signal is at a usable data rate, limiting power efficiency and system performance.
Innovation Solution
An edge-based LOS detection mechanism that uses logic gates or software to detect edge glitches in data transition edges, avoiding direct voltage measurement and enabling detection of both signal loss and unusable data due to mismatched data rates, thereby reducing power consumption and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional LOS detection mechanisms are used to detect signal loss, then signal loss can be detected, but power consumption is significant
Solution Approach 1:
The patent replaces conventional voltage-based detection mechanisms with an edge-based detection approach. Instead of measuring signal voltage levels directly, the system detects transitions (edges) in the signal. This substitution fundamentally changes the detection mechanism from analog voltage measurement to digital transition counting, thereby reducing power consumption while maintaining LOS detection capability.
Solution Approach 2:
The patent changes the detection parameter from voltage level to edge transition frequency. By monitoring whether edges occur within expected time intervals rather than measuring voltage magnitudes, the system achieves LOS detection with lower power consumption. This parameter transformation allows the use of simpler, lower-power circuitry while maintaining detection reliability.
2Measurement precision
If conventional LOS detection mechanisms are used, then signal power can be detected, but determination of usable data rate is not possible
Solution Approach 1:
The edge-based detection mechanism serves multiple functions: it detects LOS conditions, determines data rate usability, and validates signal quality. By counting edges within specific time intervals and comparing against expected rates, the single detection mechanism simultaneously provides information about signal presence, data rate compatibility, and overall signal health, eliminating the need for separate detection circuits.
Solution Approach 2:
The patent introduces edge transitions as an intermediary measurement that bridges signal power detection and data rate validation. Instead of directly measuring voltage or data content, the system uses edge transitions as an intermediate parameter that reflects both signal strength and data rate integrity. This intermediary approach allows indirect but accurate assessment of both signal power and data usability.
3Use of energy by moving object
If edge-based LOS detection is used to reduce power consumption, then power efficiency improves, but detection of complex LOS conditions may be challenged
Solution Approach 1:
The patent employs multiple edge samplers operating in parallel, each sampling at different phases or with different thresholds. By using more samplers than the minimum single sampler would require, the system achieves redundant detection capability that enhances reliability while still consuming less power than conventional methods. The excessive sampling provides multiple independent verification paths for LOS detection.
Solution Approach 2:
The system incorporates feedback mechanisms where edge sampler outputs are continuously monitored and used to adjust detection parameters. When edge transitions are detected, the system feedbacks this information to validate or update LOS status. This closed-loop feedback ensures that even with reduced-power sampling, the detection remains robust by continuously verifying edge patterns against expected behaviors for various LOS conditions.
Data Source
Figure 1A~1B
Figure 1C~1D
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AI summary
Systems and methods are provided for edge-based loss-of-signal (LOS) detection. In a receiver, a receiver port receives a data signal. A clock and data recovery (CDR) mechanism coupled to the receive port derives one or more clock signals. An LOS signal generation mechanism generates an LOS signal based on edge glitches which occur when the receive port does not receive usable data.