Optical Transceiver Clock-Phase Control for ADC Sampling Alignment
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Solution Overview
Problem
Existing optical transceivers face challenges in achieving optimal performance due to differences in physical length and sampling phase between signals connecting the optical receiver and ADCs, leading to complicated installation and prolonged setup times.
Innovation Solution
A method and apparatus that compensate for these differences by generating multiple clocks based on reference clocks, determining ADC sampling timings, and using clock phase control to optimize signal reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional optical transceiver installation methods are used, then the system can be installed, but the installation process becomes complicated and time-consuming due to the need for pre-determined training signals in the DSP part
Solution Approach 1:
The patent applies preliminary action by pre-configuring the clock generation and phase control mechanisms in the optical transceiver before installation. The system automatically generates multiple clocks with different phases and determines ADC sampling timings without requiring manual training signal configuration, thereby simplifying installation and reducing setup time.
2Adaptability or versatility
If differences in physical length and sampling phase between signals are present, then the optical transceiver can handle varied signal paths, but reception performance deteriorates due to signal discrepancies
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting clock phases and ADC sampling timings to compensate for differences in physical length and sampling phase between signals. The system generates multiple clocks with different phase values and determines optimal sampling timings for each ADC, thereby maintaining reception performance across varied signal paths while preserving adaptability.
3Productivity
If multiple ADCs are used to receive optical signals, then the system can process multiple signals simultaneously, but the complexity increases due to the need to synchronize sampling timings across different ADCs
Solution Approach 1:
The patent applies universality by creating a unified clock phase control mechanism that manages multiple ADCs through a single reference clock source. The clock generation unit produces multiple clocks with different phases that are systematically applied to all ADCs, simplifying the synchronization process while maintaining the ability to process multiple signals simultaneously.
4Manufacturing precision
If training signals are pre-determined and built in the DSP part, then the optical transceiver can achieve proper signal alignment, but the installation process becomes more complicated and time-consuming
Solution Approach 1:
The patent applies self-service by enabling the optical transceiver to automatically determine and adjust its own sampling timings without requiring external training signals or manual configuration. The clock phase control unit autonomously generates appropriate phase differences and determines optimal ADC sampling timings, thereby achieving proper signal alignment while simplifying installation and eliminating the need for complex training signal setup.
Data Source
AI summary
Provided are a method and an apparatus for optimizing the performance of an optical transceiver, and the gist is as follows: receiving an optical input and converting the optical input into electrical signals; receiving a performance value and a reference clock of the electrical signals from a DSP part; generating a plurality of clocks by using the reference clock; determining ADC sampling timings of a plurality of ADCs on the basis of phases of the plurality of clocks applied to the plurality of ADCs; and compensating, on the basis of the determined ADC sampling timings, for differences in physical length between output signals of the plurality of ADCs.