Optical Receiver Circuit Variable Rate Data Recovery
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Solution Overview
Problem
Existing optical receiver circuits for optical communication systems face data loss when switching between different transmission rates, as they are not designed to handle variable transmission rates effectively.
Innovation Solution
An optical receiver circuit configuration that includes a receiver optical assembly, a clock and data recovery section, a memory section, a decision section, and a selection section, which extracts and filters multiple clock and data signals, determines the principal frequency component, and selects the appropriate data signal for output, ensuring no data loss during rate changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switch is used to select between different transmission rates in an optical receiver circuit, then the receiver can handle variable transmission rates, but data loss occurs during switch state changes
Solution Approach 1:
The patent applies preliminary action by continuously storing incoming data in a memory buffer before the transmission rate decision is made and before the switch state changes. This ensures that data is already available and not lost when the switch transitions between different transmission rate configurations. The memory section pre-prepares data storage regardless of the current switch state or upcoming rate changes.
Solution Approach 2:
The patent introduces a memory section as an intermediary between the switch and the data processing path. This memory buffer acts as a mediator that decouples the data flow from the switch state changes, allowing the switch to change states without causing data loss. The memory section temporarily holds data during transition periods, preventing information loss while the switch reconfigures for different transmission rates.
2Measurement precision
If multiple sets of filters and amplifiers are provided for respective transmission rates, then the receiver can accurately process different transmission rates, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a single set of filters and amplifiers that can process multiple transmission rates, rather than having separate dedicated sets for each rate. The decision section controls this universal filter-amplifier set to operate at different parameters depending on the detected transmission rate, making one component perform multiple functions that would otherwise require separate components.
Solution Approach 2:
The patent applies dynamics by making the filter and amplifier characteristics adjustable and changeable based on the transmission rate being received. Rather than fixed static components for each rate, the system dynamically reconfigures the same filter and amplifier components to match the current transmission rate requirements, reducing hardware complexity while maintaining processing accuracy.
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
Enables the optical receiver circuit to accurately identify and receive optical signals at various transmission rates without data loss, by continuously storing and reading data signals, and filtering them to determine the correct transmission rate, thus optimizing data recovery.
Implementation Method 1
a receiver optical assembly for converting an optical signal into an electric signal
Data Source
AI summary
An optical receiver circuit is provided which is able to receive optical signals having a variable transmission rate, without loss of data. The optical receiver circuit according to the present invention has a light-receiving section for converting an optical signal with a variable transmission rate into an electric signal. A recovery section recovers a plurality of different clock signals and data corresponding to possible transmission rates. These data are stored into a plurality of memories and at the same time a decision section decides the transmission rate. A switch section reads data from one of the memories selected according to the result of the decision.