Optical Communication Module Power Control Circuit
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Solution Overview
Problem
In optical communication modules, the alignment of power supply terminals during insertion or removal can lead to temporary incorrect power supply voltages, causing malfunctions or failures, and the use of switches on both power supply paths increases circuit complexity and cost, while requiring identical voltages for both terminals inhibits the use of different power supply voltages.
Innovation Solution
An optical communication module with a power control circuit that manages the connection between power-supplied terminals and the signal processing circuit based on the voltage applied to the second power-supplied terminal, using an AND circuit configuration to prevent incorrect power supply voltages and reduce the risk of malfunctions, while allowing for different power supply voltages to be applied to the first and second power-supplied terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If switches are provided on both power supply paths to control power supply timing, then the risk of incorrect power supply is reduced, but the circuit scale and cost increase
Solution Approach 1:
The patent extracts the power control function from the signal processing circuit by providing a dedicated power control circuit. This separation allows the signal processing circuit to focus on its primary function while the power control circuit independently manages power supply timing, reducing overall circuit complexity while maintaining reliability.
Solution Approach 2:
The power control circuit monitors the voltage of the second power supply terminal in advance and controls the connection of the first power supply terminal to the signal processing circuit based on this monitoring. This preliminary action ensures that power is supplied in the correct sequence, preventing incorrect power supply conditions while avoiding the need for complex switching mechanisms on both power paths.
2Device complexity
If the first power supply terminal and second power supply terminal are electrically connected or arranged in close proximity, then power supply control is simplified, but different power supply voltages cannot be supplied to the terminals
Solution Approach 1:
The power control circuit acts as an intermediary between the first and second power supply terminals. It monitors the voltage of the second power supply terminal and uses this information to control the connection of the first power supply terminal to the signal processing circuit. This intermediary approach enables different power supply voltages to be supplied to the terminals while maintaining simplified power supply connection architecture.
3Ease of operation
If terminals are arranged in alignment in the insertion direction, then insertion and removal are facilitated, but temporary incorrect power supply voltage occurs during insertion or removal
Solution Approach 1:
The power control circuit continuously monitors the voltage of the second power supply terminal and uses this feedback to control the connection of the first power supply terminal. This feedback mechanism detects when the module is being inserted or removed and prevents incorrect power supply voltage from reaching the signal processing circuit, maintaining reliability while preserving the aligned terminal arrangement for ease of operation.
Data Source
AI summary
An optical communication module includes a first power-supplied terminal to be brought into contact with a first power supply terminal to have a first power supply voltage applied thereto; a second power-supplied terminal to be brought into contact with the second power supply terminal to have a second power supply voltage applied thereto; a signal processing circuit, which is connected to the first power-supplied terminal and the second power-supplied terminal, configured to perform processing on a signal; and a power control circuit, which is provided between the first power-supplied terminal and the signal processing circuit, configured to control connection between the first power-supplied terminal and the signal processing circuit based on a voltage applied to the second power-supplied terminal.