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Showing posts from September, 2020

EMI Suppression Filters

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  EMI Electromagnetic Interference (or EMI ) is said to occur when an electronic device does not receive the intended current due to the interruption of unwanted electric currents. Such disruptive currents (also termed as Noise or Electromagnetic Noise) generate from any external source or any components of the device.  Electromagnetic interference can be produced from various sources like AC motors, light dimmers, microprocessors, switch-mode power supplies, etc. It may disrupt the functioning of the device or lead to improper functioning of the device. Based on the level of disruption, EMI impacts the quality of the signal received by the device such as poor mobile networks. The severity of disruption leads to fatal consequences like failure or malfunction of medical equipment. The impact of EMI depends on several factors like interference duration, noise immunity of the device, etc. EMI is mainly of two types namely  Conducted EMI Radiated EMI In conducted EMI, noise ...

RF Interference (RFI)

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  Introduction Interference occasionally occurs in most of the radio equipment including wireless microphones. It may disrupt the device’s operation or cause system failure. Interference can be categorized into three basic types - radio frequency interference, electrical interference, and intermodulation. Let’s understand radio frequency interference (or  RFI) in detail. RFI Mostly, electronic and electrical devices such as industrial controls, switching power relays, and medical instrumentation emit radio frequency interference ( RFI ). These devices can emit radio frequency interference in two ways:  Radiated RFI, and Conducted RFI When a device directly transmits the interference to the environment, then this phenomenon is known as radiated RFI. Whereas, when a device uses its power cord to transmit interference to the AC power line through, then this phenomenon is known as conducted RFI.  Radiated radio frequency interference can be controlled by proper shieldin...