Eye Opening Monitor Circuit With Feedback Loop for Faster Eye Diagrams
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Solution Overview
Problem
Existing eye opening monitor circuits face challenges in balancing resolution and computational time, particularly in high-speed signal transmission systems, necessitating a design that efficiently generates eye diagrams without excessive data processing time.
Innovation Solution
An eye opening monitor circuit with a feedback loop that includes a first sampler, a second sampler, a comparison block, and a control logic block, which adjusts reference voltages and phases to optimize eye diagram generation through a feedback mechanism, utilizing an XOR gate and counter to control reference voltage changes based on output values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the EOM circuit is increased to express more detailed eye diagrams, then the measurement precision is improved, but the data processing time and data storage capacity increase
Solution Approach 1:
The patent divides the eye diagram measurement process into multiple phases: a first measurement phase that captures essential eye opening information with lower resolution requirements, and a second measurement phase that refines specific parameters. This segmentation allows the system to obtain sufficient measurement precision without processing all data at maximum resolution, thereby reducing overall data processing time and storage requirements.
Solution Approach 2:
The patent implements a two-stage measurement approach where the first measurement phase performs a partial measurement of the eye diagram to determine basic opening characteristics. This partial action provides sufficient information for initial evaluation, avoiding the need to process complete high-resolution data for all measurement scenarios, thus reducing computational overhead while maintaining essential measurement precision.
2Productivity
If the EOM circuit processes large amounts of data in real time or sequentially evaluates signal quality for multiple data lanes, then the productivity is improved, but the data processing time becomes a critical constraint
Solution Approach 1:
The patent segments the measurement process into distinct phases with different processing requirements. The first measurement phase processes data more quickly with reduced resolution, enabling real-time or near-real-time evaluation for multiple data lanes. The second phase performs more detailed analysis only when necessary, thus maintaining high productivity across multiple lanes without being bottlenecked by full-resolution processing for all data.
Solution Approach 2:
The patent employs periodic measurement cycles where the first measurement phase is performed continuously or at regular intervals to maintain real-time monitoring capability across multiple data lanes. This periodic action ensures that essential signal quality parameters are updated frequently, improving productivity and responsiveness while avoiding continuous high-computational processing that would increase data processing time.
Data Source
AI summary
An eye opening monitor circuit with a feedback loop configured to measure information for generating an eye diagram with respect to at least one point of a transmission apparatus or reception apparatus may include a first sampler; a second sampler; a comparison block; and a control logic block, wherein the second sampler, the comparison block, and the control logic block form a loop, thereby having a useful effect capable of shortening a time required to generate the eye diagram.