CDR Signal Pattern Filtering for Stable Phase Locking
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Solution Overview
Problem
Existing signal receiving circuits face reduced phase locking efficiency and overall signal receiving capability due to filtering specific signal patterns, which can worsen channel conditions.
Innovation Solution
A signal receiving circuit with an equalizer module, clock and data recovery circuit, and controller that dynamically opens or closes a signal pattern filter based on the compensated signal, allowing for improved phase locking and signal processing across varying channel statuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the signal pattern filter is closed to prevent adverse effects from specific signal patterns, then the reliability of phase locking is improved, but the productivity of signal receiving is reduced due to reduced phase locking efficiency
Solution Approach 1:
The patent applies dynamics by making the signal pattern filter state changeable between open and closed positions based on detected signal patterns. The filter is not statically fixed but dynamically adjusted according to the specific signal pattern being received, allowing the system to optimize between reliability and productivity in real-time based on channel conditions.
Solution Approach 2:
The patent changes the parameter of filter state (open/closed) based on the detected signal pattern characteristics. By monitoring the signal pattern and changing the filter parameter accordingly, the system resolves the contradiction by closing the filter only when specific problematic patterns are detected, rather than maintaining a fixed filter state.
2Productivity
If the signal pattern filter is opened to maintain signal receiving capability, then the productivity of signal receiving is improved, but the reliability deteriorates due to adverse effects from specific signal patterns
Solution Approach 1:
The system dynamically adjusts the filter state based on the detected signal pattern. When general signals are received, the filter remains open to maintain high receiving efficiency. When specific problematic patterns are detected, the filter closes to prevent adverse effects, thus dynamically resolving the contradiction between productivity and reliability.
Solution Approach 2:
The filter state parameter is changed based on signal pattern detection results. The system monitors incoming signals and changes the filter parameter from open to closed state when specific patterns are detected, optimizing the balance between receiving efficiency and phase locking stability according to actual channel conditions.
3Device complexity
If the signal pattern filter is fixed in a specific state, then the device complexity is reduced, but the adaptability to different channel statuses deteriorates
Solution Approach 1:
Rather than using a fixed filter state, the patent implements a dynamic control mechanism that automatically adjusts the filter state based on detected signal patterns. This dynamic approach maintains relatively simple hardware while achieving high adaptability to different channel conditions through intelligent control.
Solution Approach 2:
The system performs self-adjustment by automatically detecting signal patterns and controlling the filter state without external intervention. The control circuit monitors the incoming signal and autonomously decides whether to open or close the filter, reducing overall system complexity while maintaining high adaptability to varying channel statuses.
Data Source
AI summary
A signal receiving circuit, a memory storage device and a signal receiving method are provided. The signal receiving circuit includes an equalizer module, a clock and data recovery (CDR) circuit and a controller. The equalizer module is configured to receive a first signal and compensate the first signal to generate a second signal. The CDR circuit is configured to perform a phase locking on the second signal. The controller is configured to open or close a signal pattern filter of the CDR circuit according to the second signal, wherein the signal pattern filter is configured to filter a signal having a specific pattern in the second signal.