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  • Delving into EMI, EMC, and Noise

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    Power

    Mitigating and Measuring EMI Disturbances at IC Inputs

    Oct. 3, 2024
    Learn to measure electromagnetic emissions in integrated circuits caused by EMI disruptions, as well as the effect of power-supply interference on immunity and emissions.
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    Automotive Lighting Requires Reliable EMI Control

    Sept. 20, 2024
    A key concern within the automotive industry is ensuring electromagnetic compatibility (EMC), which involves the seamless operation of electronic systems without interference....
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    EMC Testing: Can It Untangle the Future of In-Car Connectivity?

    Aug. 14, 2024
    As the connectivity requirements in modern cars shift up to multi-gig speeds, even more rigorous testing will be required to ensure electromagnetic compatibility (EMC).
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    Preventing Conducted and Radiated EMI in Switching Power Supplies

    July 25, 2024
    As electronics technology advances, concerns mount about EMI. This article looks at EMI mitigation methods when dealing with high frequencies in switching power supplies.
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    3 Ways to Reduce Power-Supply Noise

    July 18, 2024
    Get noise out of your power supply with a multi-prong approach. Filters, bypassing, and post-regulation all can help achieve that goal.

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    Minimize the EMI in Your Power Supplies

    June 28, 2024
    Various methods, from shielding to optimized PCB layout, can be applied to significantly reduce high levels of EMI in power supplies.
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    The Ins and Outs of Frequency Spread Spectrum

    June 3, 2024
    Learn how to reduce electromagnetic interference using the frequency-spread-spectrum (FSS) approach.
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    Fear and Mitigation of an Electromagnetic Pulse

    Jan. 29, 2024
    An electromagnetic pulse—or EMP—is an impending event capable of returning the world’s society back to the dark ages. Here’s an overview of some of the methods that could help...
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    Combat Semiconductor Noise with These Isolation Methods

    Jan. 2, 2024
    This article examines simulated and experimental techniques that can help minimize noise isolation and coupling in semiconductor technology.
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    Control Ambient Noise Through Isolation and Cancellation

    Dec. 4, 2023
    Different methods of passive and active noise isolation and noise cancellation, or combinations of the two types, can be applied to help defeat the noise that plagues most all...
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    How to Reduce Harmonics in Power-System Design

    Oct. 17, 2023
    In circuits and power-distribution systems, there are many ways to measure harmonics, e.g., using a clamp meter, and methods to reduce them, such as via K-rated transformers.
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    CISPR 25 Class 5: Evaluating EMI in Automotive Applications

    Sept. 27, 2023
    Explore the CISPR 25 international standard, which sets the guidelines for measuring radio disturbances in vehicles, boats, and electrical components. Learn about test methods...
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    Bringing Isolation, High Efficiency, and Lower Noise to Switching Power Supplies

    Aug. 31, 2023
    Switching power supplies offer significant advantages over their linear counterparts, but they’re not without drawbacks.
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    More Trusted Techniques to Lower EMI

    Aug. 28, 2023
    EMI-mitigating methods discussed in this article include light communications, graphene film shielding, and grounded lids for package shielding.
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    Tried-and-True Techniques to Lower EMI in Power-Supply Designs

    Aug. 21, 2023
    Reducing power-supply electromagnetic interference can be quite challenging. This article presents some powerful tools and techniques to help achieve those EMI goals.
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    Designing Low-EMI Switched Capacitor ICs for the IoT (Part 2)

    Aug. 2, 2023
    Part 2 goes further into the methods that can help lower EMI in switched-cap designs, including implementation of active EMI filters and visible light communication.
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    Designing Low-EMI Switched-Capacitor ICs for the IoT (Part 1)

    July 6, 2023
    EMI lurks in and around state-of-the-art switched-capacitor voltage regulators targeted for ultra-low-power use in the IoT. This article presents methods to overcome that pervasive...
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    What’s the Difference Between EMI and EMC in Electronic Designs?

    June 8, 2023
    Electromagnetic interference and electromagnetic compatibility are both important considerations when designing and working with electronic components and systems.
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    Space-Saving Active EMI Filters Mitigate Common-Mode Emissions

    May 22, 2023
    Sponsored by Texas Instruments: A unique electromagnetic-interference reduction feature facilitates high-power-density designs while shrinking their footprint and cost.
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    How Does EMI Affect Various Electronic Systems? (Part 2)

    April 27, 2023
    Part 2 addresses other electronic systems that feel the impact of EMI and how SSFM can help tackle the problem.
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    How Does EMI Affect Various Electronic Systems? (Part 1)

    April 5, 2023
    Electromagnetic interference is a “beast” that can wreak havoc in electronic systems, leading to poor operation, circuit malfunction, and ultimately a total system failure.
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    Spray-On Coating Provides EMI Shielding that Easily Switches On/Off

    March 15, 2023
    By electrically “teasing” the ions using an electrolyte-bearing MXene film, it can be switched between being a barrier or being transparent to RF energy.
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    The Compounding Cost of EMI in Today's Connected Vehicle

    March 14, 2023
    Automakers need to rein in electromagnetic interference before it pumps the brakes on in-vehicle connectivity innovations.
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    Preventing Intentional EMI—aka Sabotage

    Feb. 21, 2023
    IEMI from high-power microwave sources and EM pulses can generate significant threats to electronic systems in civil and infrastructure. Thus, inclusion of methods that recognize...
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    How to Mitigate EMI in Electric and ICE Vehicles

    Jan. 20, 2023
    EMI can be a disturbance to both gas-powered- and electric-vehicle operation. EMC testing will help verify standards compliance.
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    The Story of Tesla’s Tower, His Coil, and EMI

    Dec. 8, 2022
    This article presents the amazing development of the Tesla coil, its issues with electromagnetic interference, and how the coil is still being used today.
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    EMI and Surge Protection in the IIoT

    Nov. 1, 2022
    Since many more devices are wirelessly connected, spectral noise level increases and, as a result, it causes radio interference between IIoT devices.
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    Creative Ways to Tame EMI

    Oct. 20, 2022
    Should circuit designers use shielding, active EMI suppression, or something else to mitigate EMI?
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    Tips on Designing EMI Filters for Power Supplies

    Sept. 21, 2022
    EMI filters aren’t “one size fits all” in design applications. They must be crafted to best remove conducted and/or radiated interference to a level that will not affect the performance...
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    How to Measure Op-Amp Input Capacitance to Minimize Noise

    July 26, 2022
    The input capacitance of an op amp often lies in the picofarad range, making it difficult to measure because parasitic effects in the test setup distort the result. But, with ...
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    Reduce Noise by Synchronizing Switching Regulators

    June 20, 2022
    Switching regulators are often incorporated into today’s circuit designs to boost power-conversion efficiency. However, emissions come into play, and that requires synchronization...
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    Mitigate EMI in Your 400-Hz Systems

    June 2, 2022
    How does 400-Hz EMI affect other electronic systems? This article will help designers to understand and properly filter the 400-Hz frequency component in some electronic systems...
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    Testing for Transient EMI with Real-Time Spectrum Analysis

    May 27, 2022
    Real-time spectrum analysis (RTSA) for transient events can best troubleshoot, localize, and visualize these fast-occurring signals in the form of a single spike or even a spark...
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    How to Shield and Filter RF Designs from EMI

    March 31, 2022
    RF interference can severely disrupt electronic circuit functions even in the most professionally designed systems. This article shows designers the proper use of EMI/RF shielding...
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    EMI Method for Diagnostics in Electrical Apparatus

    Feb. 25, 2022
    The application of EMI diagnostics in the power and petrochemical industries has provided information for high-voltage apparatus condition assessment since 1980.
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    Test and Debug Your Circuit Design for EMI Compliance

    Feb. 21, 2022
    Many electronic product manufacturers will fail their EMC compliance measurements at the test house upon first submission. This article will help save cost and time for manufacturers...
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    How Does EMI Affect the Human Body and Brain?

    Jan. 21, 2022
    On one front, epidemiologic studies of very-low-frequency electromagnetic fields, particularly cell phones, show an increased risk of childhood leukemia with estimated daily average...
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    Mitigate EMI to Keep Railway Safety on Track

    Jan. 19, 2022
    Today’s railway systems demand higher power motors and associated equipment, which are main perpetrators of EMI. That interference can in turn take a toll on railway signaling...
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    EMI’s Potentially Dangerous Impact on Pacemakers

    Dec. 22, 2021
    At times, electromagnetic interference from a cell phone or security metal detector or other device can present a significant threat to people with pacemakers and implantable ...
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    The Impact of EMI on Wi-Fi

    Dec. 7, 2021
    Wi-Fi networks are mostly affected by wireless interference/EMI upon the occurrence of symptoms like intermittent connectivity or unexpected disconnections, delays in connection...
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    How to Shield Your 5G Systems from EMI

    Nov. 25, 2021
    5G base stations have far more modems, data converters, and high-speed baseband digital processing, which leads to higher power needs. And they may need as much as 3X more power...
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    EMI Shielding for Drones and UAVs

    Nov. 3, 2021
    Most every electronic circuit will pose the threat of EMI radiation on other circuitry, with drones and UAVs being particularly susceptible. There’s one simple but important solution...
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    EMI Mitigation on NASA Spacecraft

    Oct. 19, 2021
    NASA is ramping up efforts in space travel with the Mars Perseverance Rover, the Artemis program, and ultimately humans landing on Mars. This article will delve into a possible...
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    Controlling EMI in Railway Systems

    Oct. 15, 2021
    Railway electronics designers are examining sources of electromagnetic interference to create a reliable and robust design architecture.
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    Op Amps Shrug Off Automotive, Industrial, Other EMI

    Sept. 14, 2021
    These rail-to-rail CMOS op amps are specifically designed to maintain their performance in high-EMI environments.
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    EMI in Wireless Power Transfer Designs

    Aug. 30, 2021
    At the heart of WPT, which charges and powers electronics like mobile devices, teapots, ebikes, and even robots, are receiver and transmitter coils using near-field inductive ...
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    Pulling Back the Curtain on Frequency-Selective-Surface Fabrics

    Aug. 28, 2021
    As more wireless devices populate densely populated areas, unwanted EMI becomes an increasingly persistent problem. One way to diminish or eliminate EMI altogether is via frequency...
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    Minimizing EMI in Commercial Aircraft

    Aug. 17, 2021
    Portable electronic devices may cause levels of EMI in aircraft equipment, acting as transmitters that can be detected by radio receiver antennas. So, as the pilot says, “your...
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    How to Reduce EMI in Switching Power Supplies

    Aug. 10, 2021
    EMI is a plague upon power electronic design architectures, and it can be mitigated in numerous ways. Adding an EMI filter may seem like the most obvious choice, but there may...
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    EMI Reduction in Automotive Power Converters

    July 29, 2021
    Designers of automotive power systems must consider mitigation techniques needed to reign in EMI disturbances to the overall electronic system in the automotive vehicle. This ...
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    EMI Reduction Techniques for Op Amps

    July 26, 2021
    How damaging is EMI to op amps in a circuit design? And what methods are used to minimize these effects? Circuit designers may be surprised at the clever ways op amps can be used...
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    Understanding EMI Filters: The Bare Essentials

    July 20, 2021
    Electromagnetic-interference filtering is a vital factor to delivering reliable power hardware.
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    EMI and New-Generation mGig Ethernet Links

    July 15, 2021
    Handling electromagnetic interference with high-speed Ethernet links is critical to proper operation.
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    Filtering and Suppressing EMI in the Smart Factories of the Future

    June 21, 2021
    In industrial environments, equipment makers, system integrators, and parts suppliers need to understand their responsibilities when it comes to EMC testing and conformity in ...
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    How to Get Superior Efficiency While Overcoming EMI Challenges

    June 7, 2021
    Sponsored by Texas Instruments: Electromagnetic interference emanates from a number of sources, including switching voltages and currents. Active filtering and integrated capacitors...
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    11 Myths About EMI/EMC

    May 27, 2021
    Common misconceptions abound about EMI and EMC, and this article looks to clear up the confusion.
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    Mitigation Strategies for Tricky FM Band Conducted EMI

    May 14, 2021
    Simple techniques that can help lower this type of EMI range from using a common-mode choke or inductor orientation to reducing switch frequency or shrinking the switch-node area...
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    Mitigating EMI in Switch-Mode Power Supplies

    May 3, 2021
    Sponsored by Texas Instruments: What are the best methods for maintaining the high efficiency of a SMPS without suffering from the detrimental effects of EMI?
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    Design with EMI in Mind Poster

    Jan. 19, 2021
    This new poster covers design considerations, prototyping, debugging guidance and certification testing. It also includes valuable information on EMI standards, EMI problems and...
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    EMI Suppression Shields: Understanding the Basics

    April 7, 2020
    With so many different magnetic materials to choose from, one must discern the frequencies and noise levels where EMI problems are prevalent and deduce how the materials’ parameters...
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    FAQs About Busbar EMI Filters

    Nov. 8, 2019
    Electromagnetic interference (EMI) can plague busbars just like it does with cables. Here are the answers to some common questions.
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    11 Myths About Analog Noise Analysis

    Oct. 7, 2016
    This article addresses 11 of the most persistent myths about noise analysis in analog designs.
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    Avoiding EMC Problems in Automotive Systems

    April 12, 2010
    The right design approach can prevent unwanted surprises from wreaking havoc