Transmission Device Load Current Control for EMI Reduction
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Solution Overview
Problem
High-functionality electronic devices experience increased electromagnetic interference (EMI) due to high-speed data transmission, which existing communication systems fail to adequately mitigate.
Innovation Solution
A transmission device with a power supply section, a first transmitter having two operation modes, and a controller that controls the load current at the voltage generator when transitioning between these modes, reducing the likelihood of EMI by moderating the load current changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-speed data transmission is implemented to increase transmission capacity, then data transmission speed is improved, but electromagnetic interference increases
Solution Approach 1:
The control section performs preliminary action by controlling the load section to gradually change the load current on the voltage generator before and during mode transitions. This preliminary current control prevents sudden voltage fluctuations that would otherwise generate electromagnetic interference, allowing high-speed transmission to be enabled without excessive EMI.
Solution Approach 2:
The invention applies parameter changes by dynamically adjusting the load current parameter during operation mode transitions. The control section modifies the load current to compensate for voltage generator fluctuations, thereby maintaining stable power supply voltage and reducing electromagnetic interference while enabling high-speed data transmission.
2Loss of time
If operation mode transitions are made rapidly to improve responsiveness, then system responsiveness is improved, but voltage fluctuations increase causing EMI
Solution Approach 1:
The control section executes preliminary action by initiating load current adjustments before the actual mode transition occurs. This advance preparation ensures that voltage fluctuations are compensated for in advance, allowing rapid mode transitions without generating harmful voltage spikes or electromagnetic interference.
Solution Approach 2:
The invention implements beforehand cushioning by using the load section to absorb and dampen voltage fluctuations that occur during mode transitions. The control section adjusts the load current to cushion against voltage generator instability, preventing these fluctuations from manifesting as electromagnetic interference even during rapid transitions.
3Stability of the object's composition
If load current is kept constant to stabilize power supply, then power supply stability is improved, but adaptability to different operation modes decreases
Solution Approach 1:
The invention applies dynamics by making the load current adjustable rather than fixed. The control section dynamically modifies the load current based on the operation mode and transition state, enabling the power supply system to adapt to different transmission modes (single-ended, differential, three-phase) while maintaining voltage stability through active current management.
Solution Approach 2:
The control section implements parameter changes by varying the load current parameter according to the required operation mode. This dynamic parameter adjustment allows the system to maintain power supply voltage stability across different transmission modes, achieving both stability and adaptability through intelligent current control.
Data Source
AI summary
A transmission device according to the disclosure includes a power supply section, a first transmitter, and a controller. The power supply section includes a voltage generator that generates a power supply voltage, and a load section configured to be able to change a load current at the voltage generator. The first transmitter has a first operation mode and a second operation mode, and transmits a first signal on the basis of the power supply voltage. The controller controls an operation of the load section when an operation mode of the first transmitter transitions between the first operation mode and the second operation mode.