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EMI news and hot articles

2009-08-27 EMI test receiver detects disturbance up to 7GHz
Rohde & Schwarz has launched a new CISPR 16-1-1 compliant EMI test receiver for the frequency range from 9kHz to 7GHz.
2009-07-23 Connector delivers optimum EMI shielding
ITT Interconnect Solutions has introduced the high reliability 38999 series of connectors for both RF and signal contacts that supports up to 128 contacts and features superior EMI shielding while meeting stringent MIL-DTL-38999 series I, II and III standards.
2009-07-16 Ergonomic EMC/EMI filters handle up to 20A
Schaffner is offering the FN 2450, a compact single-phase low-leakage EMC/EMI filter, expanding its product offering of suppression components in plastic housings.
2009-06-17 EMI filters: recommendations and measurements
The application note aims to explain test conditions for EMIF devices.
2009-06-10 EMI filters feature touch safe block connectors
Delta Electronics has released new EMI filter series to optimally cover the requirements of today's industrial markets.
2009-05-29 Integrated EMI filter handles high-speed data line apps
ON Semiconductor has introduced what it claims to be first integrated common mode choke and ESD protection IC for high-speed data line applications.
2009-03-16 Silicon oscillator reduces peak radiated EMI
Linear Technology is offering a precision silicon oscillator that significantly reduces peak radiated EMI and improves control of switching regulators in multiphase power supplies.
2008-12-22 PCB connector packs 100 positions, EMI shielding
ITT Interconnect Solutions is offering a micro miniature connector capable of providing 100 signals in a lightweight, compact package.
2008-12-17 Buck controllers boast high voltage range, reduced EMI
National Semiconductor has released four new high-voltage, non-synchronous buck controllers that feature high input voltage range, high-performance PWM control and reduced EMI.
2008-11-28 Regulators comply with EMI, multi-Gbit Serdes specs
From Linear Technology comes the LTM4606 and LTM4612, ultralow noise DC/DC ��Module regulators designed to deliver low noise power by attenuating both radiated energy and conducted wideband harmonic energy.
2008-10-03 Improved inductors trim down EMI in power applications
Murata Power Solutions has enhanced its radial lead and toroidal surface-mount inductor portfolios with the addition of four new ranges of RoHS compliant components
2008-10-02 Gate drive transformer withstands EMI effects
The SM580 gate drive transformer from Datatronic provides efficient pulse control in gate drive circuits used in MOSFETs and IGBTs for switch mode power supplies and other electronic equipment.
2008-09-30 EMI suppression film capacitors have increased voltage rating
From Vishay comes three X2 EMI suppression film capacitors with an increased maximum main voltage and a wide range of lead pitches and capacitance values.
2008-09-12 EMI filters integrate diodes for ESD protection
OnChip has introduced a family of EMI low-pass RC Pi filter arrays with on-board diodes for ESD protection
2008-09-02 Clock generator eliminates input frequency selection pins
Silego Technology Inc. is offering the SLG4421 low power, low jitter EMI reduction spread spectrum clock generator faturing FrequencyAware, a proprietary technology that automatically determines the input frequency
2008-08-28 Operational amps reject EMI, RF interference
National Semiconductor Corp. has introduced three operational amplifiers (op amps) with integrated EMI filters that maintain the accuracy of analog systems by reducing the effects of RF interference
2008-07-17 Wideband filter quashes noise on DisplayPort links
TDK Corp. announced that it has developed a wideband thin-film common mode filter for EMI suppression on DisplayPort interfaces, an industry first. It is designed specifically to suppress noise on DisplayPort connections
2008-07-04 Audio chip does EMI filtering, ESD protection
The EMIF06-AUD01F2 from STMicroelectronics implements the complete EMI filtering and ESD protection for stereo headset output and external and internal microphones within a flip-chip package measuring 2.42mm x 1.92mm
2008-07-01 Employ fencing for best EMI protection
Electronic systems typically use EMI suppression devices such as ferrites and filters. This article focuses on the use of the Faraday cage or "picket fence" approach to PCB design and layout to eliminate costly EMI protection components
2008-06-26 Oscillator streamlines power design
The STCL1120 family of silicon oscillators from STMicroelectronics combines fast start-up and high immunity to shock, vibration and EMI with lower operating current and a chip-select control for easier and more efficient power management compared to other silicon-based devices
2008-06-24 Real-time spectrum analysis for EMI diagnostics
This application note from Tektronix briefly examines the different stages of design and test with respect to test equipment and measurement techniques.
2008-06-24 Ferrites and accessories
This application note discusses the usage and function of Epcos' ferrites and cores in filter, LAN, EMI and power applications, broadband transformers and inductive sensors
2008-06-19 Using the STR91xFA external memory interface (EMI
The STR91xFA EMI bus is a very flexible bus and is user programmable. The bus can be configured to interface to different types of memory devices, including SRAM, flash memory, ROM or PSRAM
2008-06-05 Ruggedized MicroTCA chassis targets military aviation
Elma Electronic Inc. has released a ruggedized ATR chassis for MicroTCA that passes military testing for shock/vibration and EMI requirements
2008-06-03 LSI integrates embedded FRAM, EMI protection
Fujitsu Microelectronics Ltd has expanded its product line of spread-spectrum clock generators with the MB88R157 that provides countermeasures against EMI on high-frequency clock signals
2008-04-07 EMI filter arrays with ESD protection target cellphones
OnChip Devices has introduced a family of EMI filter arrays with onboard ESD protection specifically designed for high-speed data interfaces in mobile phones
2008-04-03 Spread-spectrum EMI reducer targets USB 2.0 links
PulseCore has introduced what it claims is the first spread-spectrum IC approach to radiated EMI reduction expressly designed for USB 2.0 links
2008-04-01 Reduce EMI with proper SI design
This article provides a summary of the important design considerations and presents an LVDS case study for integrated signal integrity, power integrity, and EMI design
2008-03-24 COTS- compliant EMI filters tip for military, avionic apps
Two EMI filters that satisfy the Department of Defense's Commercial-off-the-Shelf (COTS) directive have been introduced by VPT Inc. The 10A VPTF10-28 and 20A VPTF20-28 filter modules provide compliance to MIL-STD-461 C/D/E for conducted emissions in military and avionics DC-DC power systems
2008-03-21 Managing EMI in Class D audio applications
In today's portable and consumer applications, space has become a premium and engineers are often required to eliminate enclosures and shielding, and suppress EMI and noise through other means such as better segregation at the circuit level
2008-02-21 A 160W CRT TV power supply using NCP1337
ON Semiconductor NCP1337 is a valley switching controller, which eases the design of an EMI-friendly TV power supply with only a few surrounding components
2008-01-29 EMI, ESD protection included in these USB connectors
Spectrum Control's new series of USB connectors incorporate EMI or ESD filters into an industry-standard USB package
2008-01-29 Inductors shield high-voltage apps from EMI
A series of high-current radial-leaded inductors have been designed to provide EMI protection for electronic equipment used in lightning prone and high-voltage areas, and high-reliability environments
2008-01-23 MC9RS08KA application hints
This application note by Murray Stewart discusses the use of MCUs, focusing on Freescale's MC9RS08KA. Techniques and hints presented are aimed at avoiding EMI, noise, and marginal designs that may disturb circuit operation and cause system malfunctions
2008-01-02 Automate EMC measurement
This article shortly describes how to establish an automation EMI test system, emphasize the problems during the test and the solution and how to configure the system and parameters correctly
2007-12-28 EMI suppression devices guard Ethernet apps
Akros Silicon is offering a line of active EMI suppression devices that provides system-level EMC compliance and surge protection for Ethernet applications
2007-12-12 LC EMI filters guard wireless data interfaces
California Micro Devices has expanded its portfolio of EMI filters for high-bandwidth applications in mobile handsets with the introduction of the CM1692 family of inductor-capacitor filters
2007-11-26 Power switches cut losses by 500mW
Power switches that increase efficiency and reduce EMI in power supplies have been tipped by Fairchild Semiconductor
2007-11-01 Key-switch controller detects multiple press/release events
Maxim Integrated Products has released the MAX7359 2-wire interfaced, low-EMI key-switch controller that detects multiple key press and release events on up to 64 keys
2007-11-01 Spread spectrum confronts EMI
The sleepy clock-generator chip market shook itself awake as two rival vendors, Cypress Semiconductor and SpectraLinear rolled entries in a new class of programmable devices.
2007-10-24 Fast-recovery rectifier keeps EMI quiet
Fairchild Semiconductor has announced seven new STEALTH II fast-recovery rectifier diodes
2007-10-08 HDMI 1.3a buffer IC rolls for large DTV sets
Rohm has developed a high-performance HDMI 1.3a-compliant buffer IC specifically designed for large DTVs and multimedia monitors, where the relatively large distance between the image processor and HDMI receiver makes them susceptible to EMI and noise
2007-09-21 General PCB design and layout guidelines
This application note is intended to assist customers in designing products that comply with both EMI and ESD standards using Micrel's 10/100 family of Ethernet products
2007-08-23 Clock modulators reduce EMI in large-format LCD panels
Maxim claims that its new center spread-spectrum clock modulators are suitable for dithering the row/column-driver clock signal in large-format LCD panels in televisions and PC monitors.
2007-08-21 COTS feed-thru EMI filter meets QPL requirements
Spectrum Control has released the COTS single line feed-thru EMI filters that meet all requirements of the QPL
2007-07-19 Programmable current limited termination
This document will describe the PCLT behavior, give useful recommendations to achieve robust PCLT designs regarding EMI test (IEC 61000-4-5 and 4-4
2007-07-12 Quad EMI filter array integrates ESD protection
Kyocera Corp. introduces the KVA21 quad EMI filter array, a compact, RoHS compliant, distributed constant type component featuring both EMI filtering and ESD protection in a single package
2007-06-01 Sound advice on Class D audio amps designs
Audio designers need to pay attention to many details when they are building high-performance Class D audio amplifiers, including the choice of output transistor size, output stage protection, modulation technique and filter topology. EMI reduction and system cost must also be considered along with the desired sound quality
2007-05-23 ESD/EMI protection ICs optimized for 800MHz to 2.7GHz
Semtech Corp.'s new EClamp239xP series of inductor-capacitor (L-C) protection devices feature greater attenuation, steeper amplitude roll-off and lower clamping voltage.
2007-05-07 Low pass filters for audio filter applications
In portable devices such as cellphones, there is the added concern with regard to the audio lines. Not only do they still need ESD protection, there are quite often requirements to filter out EMI. This application note will offer considerations when choosing an ESD/EMI filter
2007-04-23 Ultrathin boost converter delivers 87% efficiency
Fairchild's FAN5336 high-frequency integrated boost converter in UMLP package allows designers to achieve an 87-percent system efficiency, low EMI and board space savings in a wide range of small LCD bias supply and white LED backlight designs
2007-04-19 Clockless AHB offers low power consumption
Handshake Solutions has released a clockless version of a multilayer AMBA Advanced AHB, which provides low power consumption and low EMI
2007-04-16 Bus signal line load for the MultiMediaCard
Even though Bus Signal Load was defined under NID spec, the most application manufacturers are violating total capacitance CL value by EMI and ESD stabilization purpose. By doing so, there are recognition failure with wrong command 1 response because of slowness of rising time slope in open-drain mode. This application features the guidelines to prevent compatibility failure
2007-04-09 Shielded inductors suit tiny, EMI-sensitive designs
The new low-profile inductors from C&D Technologies feature an integral shield that makes them appropriate for space-constrained designs where EMI sensitivity is a concern
2007-04-09 Four-PLL spread-spectrum timing chip cuts EMI
Cypress Semiconductor introduced a four-PLL timing device with two spread-spectrum PLLs to reduce EMI
2007-04-02 Reduce switcher EMI with frequency spreading
When using multiple switching regulators is appropriate, multiphase synchronization offers clear benefits, including reduced EMI. As for the EMI benefits of SSFM, it depends on the bandwidths of interest. SSFM is not a substitute for proper design, but it may offer the improvement that achieves EMC compliance
2007-03-27 EMI filters double ESD protection, cut PCB space
NXP's ultrathin EMI filters enable handheld designers to reduce the size of their PCBs while doubling the level of integrated ESD protection
2007-03-20 Buck regulator cuts noise, EMI filter requirements
Intersil has launched a 2.5A, wide input voltage synchronous buck regulator that reduces noise and EMI filter requirements through programmable switching frequency and external synchronization
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