Optical Module Detection Circuit Potentiometer Adaptability
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Solution Overview
Problem
Existing optical communication systems face challenges in adapting to different modulator responsivities, leading to low locking speed, horizontal shifts, and false locking points, while also occupying large PCB areas due to complex detection circuits.
Innovation Solution
A detection circuit incorporating a sampling module with a potentiometer to convert sampling current to voltage, an amplifying module with adjustable amplification, and an analog-to-digital conversion module, along with a processor for digital filtering and bias voltage control, allows for adaptable resistance values to match modulator responsivities, enhancing locking speed and reducing PCB area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sampling resistors are arranged and selected by using a switch to adapt to different modulator responsivities, then the adaptability to modulator responsivity is improved, but the device complexity and PCB area increase
Solution Approach 1:
The patent merges multiple sampling resistance values into a single potentiometer component. Instead of using multiple discrete sampling resistors with switches, the invention uses one potentiometer that can provide a range of resistance values, thereby achieving the same adaptability function with fewer components and reduced circuit complexity.
Solution Approach 2:
The potentiometer serves multiple functions: it acts as both the sampling resistor and provides adjustable resistance values to match different modulator responsivities. This multi-functional component replaces what would otherwise require multiple specialized components, simplifying the overall circuit design.
2Adaptability or versatility
If multiple sampling resistors are arranged and selected by using a switch to adapt to different modulator responsivities, then the adaptability to modulator responsivity is improved, but the PCB area occupied increases
Solution Approach 1:
The patent merges multiple sampling resistance values into a single potentiometer component. Instead of using multiple discrete sampling resistors with switches, the invention uses one potentiometer that can provide a range of resistance values, thereby achieving the same adaptability function with fewer components and reduced circuit complexity.
3Device complexity
If a fixed sampling resistor is used in the detection circuit, then the device complexity is reduced, but the adaptability to different modulator responsivities deteriorates
Solution Approach 1:
The patent transforms the static, fixed sampling resistor into a dynamic, adjustable potentiometer. This allows the sampling resistance to be changed according to different modulator responsivities, providing adaptability while maintaining circuit simplicity. The potentiometer can be adjusted to match various modulator characteristics without requiring multiple fixed resistor configurations.
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
The solution effectively adapts to different modulator responsivities, increasing locking speed, preventing horizontal shifts, and reducing false locking points while minimizing PCB area occupation.
Implementation Method 1
a first potentiometer, where the first potentiometer configured to convert a sampling current into a sampling voltage
Implementation Method 2
a second potentiometer, where the second potentiometer is configured to adjust an amplification coefficient of the amplifying module
Data Source
AI summary
The present invention discloses an optical module and a detection circuit thereof. The detection circuit includes: a sampling module, including a first potentiometer configured to convert a sampling current into a sampling voltage; an amplifying module, coupled to an output end of the sampling module and configured to amplify the sampling voltage; and an analog-to-digital conversion module, coupled to an output end of the amplifying module and configured to convert the amplified sampling voltage into a digital signal for detection. By arranging a potentiometer in a sampling module of a detection circuit, a resistance value of the sampling module can be adjusted, thereby adapting to responsivities of different modulators, increasing the locking speed of a modulator, preventing horizontal shifts of a locking point and a false locking point, and reducing the occupied PCB area.