The “TDEMI” measurement system from GAUSS Instruments carries out emission measurements in the time domain, and features EMI receiver emulation using an FFT-based bank of filters. With real-time analysis, the signal is parallel-processed continuously over a wide frequency band and is then analyzed using the quasi-peak detector. A special mode enables real-time analysis in peak, … [Read more...]
Op Amps Feature Integrated EMI Filters
The LMV83x Series of operational amplifiers from National Semiconductor has integrated EMI filters that maintain the accuracy of analog systems by reducing the effects of RF (radio frequency) interference. They are reported to have an EMI rejection ratio (EMIRR) of 120 dB. The LMV831 single, the LMV832 dual, and the LMV834 quad op amps feature CMOS inputs, a maximum inset … [Read more...]
Miniature EMI Filter Arrays with ESD Diodes Target Mobile Handsets
A new family of electromagnetic interference, low-pass RC Pi filter arrays from OnChip comes with onboard diodes for electrostatic discharge (ESD) protection. These devices are crafted specifically for high-speed data LCD and memory card interfaces in mobile phones, PDAs, and MP3 players. The OC1425 is a 4-channel EMI filter while the EMF4020 and the OC1442 are 8-channel EMI … [Read more...]
Thin-Film Common Mode Filter Targets Use in DisplayPort
The new TCM1210U500-2P from TDK Corporation is a wideband, thin-film, common-mode filter for EMI suppression in DisplayPort interfaces. This new filter works as an EMI countermeasure on high-speed data transmission lines in notebook computers, audio-visual equipment, and other electronic devices. With dimensions of 1.2 mm (L) x 1.0 mm (W) x 0.6 mm (H), this product has been … [Read more...]
TDK and EPCOS Enter Business Combination Agreement
Two companies prominent in the EMI/EMC industry, Munich-based EPCOS and Tokyo-based TDK have entered a business combination agreement. This move will combine both companies’ activities in the electronic components sector to create a strong global business presence across various customer demographics and geographic regions. As an initial step in implementing this agreement, TDK … [Read more...]
Filtered AC Inlet Performs at High Frequencies up to 1 GHz
The 5150 Series of AC Filtered Inlets from Schurter utilizes X2Y® filter technology. These devices are characterized by broadband suppression properties to 1 GHz in tandem with a simple and universal input. Unlike previous products that used X2Y® but were limited to DC applications, the 5150 Series provides EMI protection for AC power input. X2Y® combines the X and Y capacitors … [Read more...]
Filter Protects Phone from RF Interference
The RFI1400 is a radio interference filter crafted to reduce radio frequency interference that may be picked up from the AM radio band and transmitted to the receiver of a telephone. It also helps eliminate interference from other radio sources such as FM, ham, and citizen bands. It can also be used to reduce incidental RF noise that may be introduced into a computer modem. … [Read more...]
Tiny Ferrite Beads Target Space Critical Applications
Murata Electronics North America has introduced ultra-small ferrite beads, measuring only 0.4mm x 0.2mm x 0.2mm. The 01005 sized, BLM02 series is well suited to noise suppression use in EMI filter applications and DC power lines, which are found in numerous electronics including RF modules, laptops, portable music devices, and car navigation systems. In addition to the … [Read more...]
New Filter Technology Protects Motors in Extreme Environments
SineFormer inverter output filter technology recently introduced by EPCOS is used for frequency converters and drives. In contrast to convention filter topology, the SineFormer simultaneously converts the phase-to-phase voltages into sinusoidal waveforms and thus minimizes the common mode current that can damage motor bearings. By suppressing common mode voltage peaks to … [Read more...]
National Semiconductor's New Amplifier Family have Integrated EMI Filters
National Semiconductor's New Amplifier Family have Integrated EMI Filters National Semiconductor Corp. has introduced three new operational amplifiers (op amps) with integrated electromagnetic interference (EMI) filters that maintain the accuracy of analog systems by reducing the effects of radio frequency (RF) interference. The LMV83x op amps deliver the industry's highest EMI … [Read more...]
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