2432 results found for Communications /Networking, displaying items 1 - 20
July 1, 2009
[TechScope] ZigBee Alliance Releases the Battery-Free, Energy-Harvesting Green Power Standard
ZigBee Green Power, introduced by the ZigBee Alliance, is an energy-harvesting, battery-free feature set designed to create a global, standard technology for self-powered devices. Without needing wires or batteries, according to the Alliance, these new devices are compatible with ZigBee and ZigBee PRO networks and can enable maintenance-free, environmentally friendly products.
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Staff
June 29, 2009
[Focus On Emerging Technologies] Imagine a World of “Internet Enabled” Applications
With widespread availability of WiFi access points, the internet is merely a click away from anyone or any application. Combine this with recent developments in compact, ultra-low-power WiFi modules, and the conditions are primed for a whole new class of “Internet Enabled” applications.
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Symmetry Electronics
June 25, 2009
[TechView: Communications] Programmable Clock Improves Gigabit Network Performance
As network speeds increase, the jitter performance of the timing clock becomes a major design factor. The best solution is to start with a quality clock with minimum jitter. Cypress Semiconductor’s FleXO family of programmable high-performance clock generators deliver ultra-low phase jitter as low as 0.6 ps typical from 12 kHz to 20 MHz.
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Louis E. Frenzel
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[Editorial] Web 3.0 Promises New Ways To Analyze And Share Data
Just when you thought it was safe to navigate the social media seas of the Web, along comes the next big wave. Dubbed Web 3.0 or the Semantic Web, these ideas promise new ways to create, massage, analyze, and share data. At the recent Web 3.0 Conference in New York City, I got a taste of what’s to come and thought about how some of these ideas might be useful to the design engineering community. VISITING CALAIS During his...
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Joseph Desposito
June 18, 2009
[Editor's Notebook] Do You Need Wireless Video Transmission For Your HDTV? Maybe, Sort Of…
It has been possible to send HD video over wireless links for consumer electronic equipment connectivity for a long time. Wi-Fi and WiMedia UWB solutions have been around a few years, but both rely on compression techniques to bring the data load down into a range that the wireless data speeds can handle. But compressing and then decompressing video always leaves it just a bit less definitive than before compression.
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Louis E. Frenzel
June 17, 2009
[TechView: Communications] IEEE 802.15.4 Transceiver Targets ZigBee, RF4CE Remote-Control, And Smart Energy Apps
The CC2530 from Texas Instruments is an 802.15.4 radio on a chip along with an 8051-compatible MCU and appropriate interfaces that should find its way into a variety of wireless applications. Recall that 802.15.4 transceivers operate in the worldwide unlicensed 2.4-GHz band with 16 channels of data using direct-sequence spread spectrum (DSSS). The data rate is 250 kbits/s. More and more, this standard is being adopted in industrial and commercial monitoring and control products.
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Louis E. Frenzel
June 17, 2009
[TechView: Communications] RS-485/RS-422 Serial Transceivers Now Can Hit 32 Mbits/s
The popular RS-485 and RS-422 serial data networks used in industrial automation can now be made better than ever thanks to Exar’s SP349x series of transceivers, which offer data rates to 32 Mbits/s and increased line protection. When designing new RS-485 and RS-422 hardware and next-generation industrial networks for process control, plant environmental control, and remote sensing and metering applications, you can get the extra speed often demanded.
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Louis E. Frenzel
June 16, 2009
[TechScope] U.S. CTO Chopra Addresses CEA Show In NYC
Appointed by President Obama in April, U.S. CTO Aneesh Chopra made his first public appearance and gave the keynote address at the Consumer Electronics Association (CEA) Line Shows and Digital Downtown Conference Program held in New York, June 10-11. During his speech, he outlined the four pillars of his plans for the U.S. as well as fielded questions from the audience.
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Kelly Allegra
June 18, 2009[Technology Report] Hot Cellular Market Can't Escape Icy Economic Winds
While nothing seems to be totally immune to the economic downturn, except perhaps government growth, the wireless industry is still performing better than most. Revenue is down, but the subscriber rate is up. U.S. carriers added 15 million new subscribers in 2008, boosting the total to more than 270 million by the end of the year. Just over 2.2 trillion minutes were used for voice calls alone in 2008. Total cellular revenue topped $148...
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Louis E. Frenzel
June 18, 2009[Technology Report] Laptops, Netbooks, And E-books, Oh My!
You don’t need to wave a magic wand to capitalize on the hordes of mobile devices that are on the market these days. They’ve become bright spots in a wobbly consumer electronics industry as buyers look for new bargains. In many instances, the cutting edge, such as the iPhone and Kindle, still carries a premium price. But the potential of lower-cost alternatives as well as the functionality provided by these new platforms is driving interest. ...
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William Wong
June 18, 2009[Technology Report] Putting Robots In Harm's Way
Aremote-controlled landing craft approaches a beach and deploys its robotic cohorts, including a helicopter. The helicopter flies inland and deposits a set of tracked robots that split up to reconnoiter. They use laser designators to highlight targets for incoming robot fighter planes that will launch missiles as part of a coordinated attack. This futuristic scenario is years away, not decades. Odds are good that if you step on a battlefield, a...
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William Wong
June 18, 2009[Technology Report] Electronics Helps Foster Decentralized Healthcare
Rising healthcare costs, a stretched-thin number of medical providers, longer life expectancies, and a growing number of elderly and disabled patients are transforming the face of medical care. Decentralization—moving healthcare away from medical facilities and into the patient’s home—is fast becoming the new model. In 2008, Medicaid spending for long-term care cost $99.5 billion, according the U.S. Department of Health and Human Services. ...
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Roger Allan
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 11, 2009[Design View / Design Solution] Reduce The Small-Memory-Footprint Requirements In Wireless Sensor Networks
Products based on wireless technology have been steadily insinuating their way into our lives since the 1980s. Wireless devices such as Apple’s iPhone and Amazon’s Kindle have become common items in many of today’s households. Similarly, within the industrial market segment, the use of small wireless sensor devices is becoming more widespread within office buildings and on factory floors. Equipment manufacturers are incorporating and connecting...
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Derrick Lattibeaudiere
June 11, 2009[Technology Report] Latest Test Solutions Measure Up To Wireless Challenges
Demand for test solutions in the communications and wireless sector continues to soar. Not only has there been an explosion in the adoption rate of new wireless technologies, but couple that with tough standards, multiple radios per product, and millions of devices to test, and it quickly becomes evident that testing capability is critical to the success of any wireless device today. Not to fret, though. Test and measurement companies are on top of the situation. A...
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Louis E. Frenzel
June 11, 2009[TechView: Communications] Quad 10BaseT Ethernet PHY Transceiver Consumes Just 2 W/Port
for years to make a low-power 10-Gigabit Ethernet (10GE) twisted-pair transceiver, especially in multiport versions to make 10GE 48-port switch platforms practical. Now, Aquantia has accomplished that goal with its AQ1401 quad-port, AQ1202 dualport, and AQ1103 single-port 10GBaseT Ethernet physicallayer (PHY) transceivers (see the figure). The speed and power characteristics were ...
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Louis E. Frenzel
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