Questions & Answers on EMI

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EMI Reset

Editorial Team - EMC Directory

Jul 5, 2024

Board-level shielding (BLS) refers to the use of metal cages or enclosures on printed circuit board (PCB) to protect sensitive electronic components from electromagnetic interference (EMI) and radio frequency interference (RFI) and reduce crosstalk issues in the PCB. The metal enclosure acts as a Faraday cage, blocking electromagnetic radiation signals from entering or exiting the shielded area of...read more

Comprehensive Guide to EMI Filter Selection

Editorial Team - EMC Directory

Oct 18, 2024

In today's world, electronic devices must operate seamlessly within a crowded electromagnetic spectrum. As electrical systems become more complex, electromagnetic interference (EMI) becomes a significant challenge for engineers. EMI can originate from both natural sources, such as lightning or static electricity, and man-made sources, that include interference from cell phones, radio signals, ...read more

What is Common Mode (CM) Interference?

Editorial Team - EMC Directory

Nov 20, 2024

Common mode (CM) interference is a form of conducted electromagnetic interference (EMI) that can degrade the performance of or even damage the electrical and electronic equipment connected to power or signal lines as well as nearby devices/systems. It is caused by common mode (CM) noise currents that flow through the signal and return lines in the same direction with equal magnitude and phase with...read more

What are EMI feedthrough filters?

Editorial Team - EMC Directory

Jul 15, 2024

Conducted EMI are the high-frequency noise currents that can be generated during the electrical and electronic device's operation that travel via power lines or signal lines and can interfere with the operation of other connected devices.An EMI feedthrough filter is an electronic component or circuit designed to suppress high-frequency noise currents (conducted EMI/RFI) on power and signal/dat...read more

Common Mode Noise Vs Differential Mode Noise

Editorial Team - EMC Directory

Dec 3, 2024

Common mode noise and Differential mode noise are the forms of conductedelectromagnetic interference (EMI), which can be generated or emitted by electrical and electronic equipment (e.g., switched mode power supply) during operation or other natural causes, potentially affecting other connected or nearby devices. In most circuits, both CM and DM noise currents are typically present.It is important...read more

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