Photocoupler Communication System Inversion for High-Speed Serial Data
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Solution Overview
Problem
Existing communication systems using photocouplers face limitations in achieving high-speed serial communication due to longer delay times, particularly when transitioning from the ON state to the OFF state, which restricts communication speed.
Innovation Solution
The proposed communication system incorporates a configuration where one photocoupler is included in the transmission path and another is in an opposite conductive/non-conductive state, utilizing a combination of photocouplers and transistors to control the communication current flow, reducing switching time periods and enabling high-speed serial communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If photocouplers are used for serial communication, then signal isolation and communication reliability are improved, but switching time increases causing communication speed to decrease
Solution Approach 1:
The patent applies dynamics by making the conductive state of photocouplers changeable and controllable. Specifically, the transmission photocoupler and reception photocoupler are switched between conductive and non-conductive states dynamically during communication operations, allowing optimization of both reliability and speed through controlled state transitions
Solution Approach 2:
The patent changes the physical state parameter of photocouplers by transitioning them between ON and OFF states. The transmission photocoupler and reception photocoupler are switched between conductive and non-conductive states, changing their electrical parameters to achieve both reliable signal isolation and reduced switching time for high-speed communication
2Device complexity
If both transmission photocoupler and reception photocoupler transition simultaneously, then communication protocol simplicity is improved, but delay time increases due to cumulative switching time
Solution Approach 1:
The patent applies inversion by making the conductive states of transmission and reception photocouplers opposite to each other. When the transmission photocoupler is conductive, the reception photocoupler is non-conductive, and vice versa. This inverted relationship prevents simultaneous transitions, eliminating cumulative delay time while maintaining simple communication protocol
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
This configuration reduces signal distortion and enhances communication speed by minimizing the delay time associated with state transitions, allowing for efficient data transmission between devices.
Implementation Method 1
a transmission phototransistor included in a transmission photocoupler and a reception light-emitting diode included in a reception photocoupler
Implementation Method 2
the reception photocoupler transitions from an OFF state (non-conductive state) to an ON state (conductive state) in response to a state transition of the transmission photocoupler
Data Source
AI summary
A transmission circuit includes a photocoupler, a conductive/non-conductive state of which is controlled in accordance with data to be transmitted to a communication device. A reception circuit includes a photocoupler, a conductive/non-conductive state of which is controlled in accordance with the conductive/non-conductive state of the transmission path. A transmission circuit includes a photocoupler, a conductive/non-conductive state of which is controlled in accordance with data to be transmitted to a communication device. A reception circuit includes a photocoupler, a conductive/non-conductive state of which is controlled in accordance with the conductive/non-conductive state of the transmission path. The photocoupler is included in the transmission path. The photocoupler and the photocoupler are in opposite conductive/non-conductive states.