2044 results found for Components, displaying items 1 - 20
June 25, 2009[Electronic Design Products] Converters Provide Crucial Help In EMI/RFI Shielding
Manufacturers of electronic devices employ electromagnetic interference (EMI) and radio-frequency interference (RFI) shielding to protect sensitive digital circuits from external emissions that can impair product performance, as well as to contain the potentially harmful emissions that come from their products (see “The Dark Force Of Evil In Electronics: Electromagnetic...
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Craig McClenachan
June 25, 2009[Engineering Essentials] Understanding Common-Mode And Differential-Mode Interference
When identifying and controlling electromagnetic interference (EMI), discussion of common-mode and differentialmode interference will likely dominate. Differential-mode interference is a signal that appears on two lines of a closed loop, but current flow is in opposite directions. This kind of interference essentially appears in series with the desired signal. The solution is an inductor in series with the high side (and/or low side) of the line and a...
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Louis E. Frenzel
June 25, 2009[Engineering Essentials] EMI/EMC Regulations
Almost all governments have very specific rules and regulations related to the control of electromagnetic interference (EMI). Most spell out the parameters of what is allowed and methods of testing. In the U.S., EMI guidelines for commercial equipment are handled by the Federal Communications Commission (FCC). The Code of Federal Regulations (CFR) section 47 Parts 15, 18, and 68 contain relevant information that all engineers should be aware of when ...
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Louis E. Frenzel
June 25, 2009[Engineering Essentials] The Dark Force Of Evil In Electronics: Electromagnetic Interference
Is there an electronic product or circuit that’s not susceptible to electromagnetic interference (EMI)? For that matter, are any devices EMI-free? Simply put, no. EEs wish it wasn’t the case, of course, but it’s a fact of life in electrical engineering— and it’s one of those things they typically don’t teach you in school. Most engineers find out about EMI on the job, where expunging it often takes more time than the original design itself. And don’t...
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Louis E. Frenzel
June 25, 2009[Ideas For Design] Seamless Power Switcher And Battery Charger Solution Targets Portable Devices
In today’s world, there are many applications for portable devices. These devices must have extremely low or no battery drain when turned off and need to charge their on-board batteries when connected to an external power supply, whether the device is turned on or not. This circuit provides seamless switching from batteries to external power and provides a simple charging solution. In addition, there are several output signals for a microcontroller (MCU). This...
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Jim Wilson
June 25, 2009[Engineering Feature] Oscillators Face The Final Frontier
High-reliability oscillator design for satellite systems poses many challenges to the engineering community. The custom nature of the design efforts as well as the quality requirements tend to lead to large, complex specifications that drive cost, design cycle time, and overall product lead time. Materials utilized in design and construction are also limited by environmental constraints such as outgassing, radiation, the use of pure tin, and shock/vibration...
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David Bail
June 18, 2009[Editorial] How Do We Get Out Of This Mess? Try New Ideas
Life if full of unassailable assumed truths, and it’s an often disturbing but always constructive exercise to challenge them. Let’s start by questioning an easy one from everyday life: are you a good driver? Your instinctive answer is undoubtedly yes, and you would receive the same answer from anyone else you ask. But there are obviously loads of hopeless drivers on the roads. It just so happens that you, or anyone that’s asked, isn’t one of...
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Joseph Desposito
June 10, 2009
[Technology In The News] Simple, Low-Cost Materials Create Flexible Memory
Researchers at the National Institute of Standards and Technology (NIST) are developing memory chips with the ability to bend and twist. The July 2009 issue of IEEE Electron Device Letters reports that the engineers have found a way to build a flexible memory component out of inexpensive, readily available materials.
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ED News Staff
June 11, 2009[Lab Bench] Accelerometers Shake Up The Old Ways To Play
Is it time to think outside the box or just give it a shake? Movement- or gesture-oriented input isn’t new. Try shaking a cell phone like Apple’s iPhone. Matched with the right application, like a game, juggling the phone may produce the effect you want. Then again, it may not. These little tricks are brought to you by accelerometers. Microelectromechanical systems (MEMS) technology has made these devices small and inexpensive. They’re used to shut down...
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William Wong
May 28, 2009
[New Products] Generic DC-AC Inverters Fit CCFL-Backlit LCD Applications
The Smart Force SFW series of low-cost generic dc-ac inverters from Endicott Research Group targets universal use across a broad range of CCFL-backlit (cold-cathode fluorescent lamp) LCD applications. The series comprises 12 parts that cover a wide range of applications for ease of selection and pricing that’s competitive with key offshore competitors, according to the company.
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Staff
May 21, 2009[Eye On Europe] Diamonds And Other Technologies Put A Sparkle In The European Market
Despite the global economic slowdown, the electronics sector in Europe is staying quick on its feet. Developments in transistors, communications, and displays are particularly setting the pace. TINY DIAMOND Scientists at the University of Glasgow, Scotland, have developed the world’s smallest diamond transistor. At just 50 nm long, the “gate” of the diamond transistor developed by David Moran of the Department of...
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Paul Whytock
May 21, 2009[Editorial] The E-mail “Bag” Offers Some Interesting Components Tidbits
To commemorate our second annual Top 101 Components report, I read through some of the hundreds of e-mails I get on a daily basis for information related to the kinds of components we typically cover in the Electronic Design Products section, which appears every other issue. Let’s start with resistors. Vishay recently introduced streaming video comparisons of different types of resistors on its Web site....
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Joseph Desposito
May 21, 2009[Engineering Feature] Choosing The Top 101
If semiconductors are the heart of most electronic designs, then components like resistors, capacitors, inductors, interconnects, switches, sensors, LEDs, and displays represent many of the other body parts needed to complete the design. Each of these components comes in a wide variety of flavors. Last year, we covered components in our “EEPN in Electronic Design” department, while this year we changed the name of the section to “Electronic Design Products.” During the past...
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Joseph Desposito
May 21, 2009[Engineering Feature] The Top 101 Components Take Center Stage
WWhen designers create new devices, they need info about the latest electronic components to hit the market. One of the ways to gather this information is via Products of the Week. This e-newsletter is sent to more than 60,000 subscribers each Monday and covers innovative new products and technologies in the semiconductor, components and assemblies, boards and modules, and design, assembly, and test sectors, with direct links to the manufacturers’...
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Joseph Desposito
May 7, 2009[Engineering Feature] The Indianapolis 500 Electronic Edge
Surely most racing fans have May 24, 2009, circled on their calendars. For the non-gearheads, this Memorial Day marks the 93rd running of the Indianapolis 500. The event will pit 33 cars and drivers against each other in a grueling 500-mile race around a 2.5-mile track. The fastest average speed is more than 185 mph with top speeds cresting at about 235 mph. The front and back straightaways are only five-eighths of a mile long, so drivers spend a good deal of...
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William Wong
May 7, 2009[Embedded in Electronic Design] A Zoom Lens Improves Photos As Well As Vision Systems
The lens and the capture electronics are the two most critical pieces of a vision system. Skimp on either, and the results are sub-par. Going with a fixed glass lens often improves quality over a plastic lens, but an adjustable zoom lens provides more options without having to move the camera. This is handy in taking photographs, but it can be useful in a range of other imaging applications as well, including robotics. Adding a built-in zoom lens to...
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William Wong
May 7, 2009[Embedded in Electronic Design] Stackable Options
The 2009 Embedded Systems Conference was the host for a range of stackable options using new standards such as SUMIT and StackableUSB. The 420-by-372 USB3201 LCD from Micro/Sys is designed to work with StackableUSB boards. It has 4 Mbits of serial flash on board plus an optional touch screen. Versalogicâ??s Ocelot single-board computer with a 1.6-GHz Atom processor sports SUMIT-104 connectors. The PC/104 ISA connector provides legacy support...
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William Wong
May 7, 2009[Ideas For Design] Simple Technique Drives Multiple LEDs From One Processor Pin
Driving multiple LEDs with one microprocessor GPIO pin is a well-known technique. Typically, designs perform this task by issuing pulse widths and clocks of differing durations and employing multiple RC networks to distinguish between them. The design described here is much simpler. The microprocessor pin is connected to the clock of a multipleoutput sequential counter (see the figure). In its...
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Christopher Paul
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