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What is the common impedance induction of RFI component interference path
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RFI component is the abbreviation of anti RF interference component. RF interference is the interference generated at or very close to the signal frequency received by the receiver. The Federal Communications Commission (FCC) of the United States has formulated RF interference standards for electronic equipment to minimize this interference.

 

RFI components generally include RFI gaskets, common mode chokes, ferrite beads and other products.

 

Interference voltage will be generated when interference current flows through impedance Z. The interference voltage caused by common impedance induction is divided into the following categories:

 

First of all, from the internal circuit layout and ground wire design of the equipment, when a power supply supplies several circuits, the output current of the high-level circuit will flow into the power supply in whole or in part, resulting in interference. For high frequency, the output impedance of the power supply and the distributed inductance of the power lead can cause interference.

 

Similarly, when there is high-frequency current on the grounding system inside the equipment, there will be the problem of converting the impedance of the grounding system into voltage. When it forms a part of the input circuit of the low-level signal amplifier, the voltage of the grounding system will be amplified and output in the form of interference.

 

Secondly, from the perspective of shared power supply and grounding wire, when several devices and RF devices are powered by the same AC power supply, the high-frequency current generated by the RF device is converted into interference voltage to other devices through the impedance Z of the shared power supply, and it should be transmitted through the power source line.

 

It should also be noted that if each equipment uses a common wiring as the grounding wire, mutual interference will inevitably occur when there is a large current flowing on the common grounding wire.

What is FPGA field programmable gate array
What are the popular models of Coil?
What is the common impedance induction of RFI component interference path

 

RFI component is the abbreviation of anti RF interference component. RF interference is the interference generated at or very close to the signal frequency received by the receiver. The Federal Communications Commission (FCC) of the United States has formulated RF interference standards for electronic equipment to minimize this interference.

 

RFI components generally include RFI gaskets, common mode chokes, ferrite beads and other products.

 

Interference voltage will be generated when interference current flows through impedance Z. The interference voltage caused by common impedance induction is divided into the following categories:

 

First of all, from the internal circuit layout and ground wire design of the equipment, when a power supply supplies several circuits, the output current of the high-level circuit will flow into the power supply in whole or in part, resulting in interference. For high frequency, the output impedance of the power supply and the distributed inductance of the power lead can cause interference.

 

Similarly, when there is high-frequency current on the grounding system inside the equipment, there will be the problem of converting the impedance of the grounding system into voltage. When it forms a part of the input circuit of the low-level signal amplifier, the voltage of the grounding system will be amplified and output in the form of interference.

 

Secondly, from the perspective of shared power supply and grounding wire, when several devices and RF devices are powered by the same AC power supply, the high-frequency current generated by the RF device is converted into interference voltage to other devices through the impedance Z of the shared power supply, and it should be transmitted through the power source line.

 

It should also be noted that if each equipment uses a common wiring as the grounding wire, mutual interference will inevitably occur when there is a large current flowing on the common grounding wire.

What is FPGA field programmable gate array
What are the popular models of Coil?

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