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Precision Power Control in Electro-Optics

September 8, 2009 7:17 am | by Mary Johnson, Wavelength Electronics | Comments

As new laser devices become available, their complexity is met with increasingly sophisticated electronics that allow continuous refinement of precision.  As optical systems mature, new processes and procedures are made possible.  These include: lasers in medical diagnostic and treatment equipment (e.g. Optical Coherence Tomography (OCT)), increased sensitivity for environmental monitoring equipment

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Battery and Charge Management: Choices and Tradeoffs

September 8, 2009 6:30 am | by Masoud Beheshti, Director, Product Line Manager, Texas Instruments | Comments

Designers of portable electronic devices have a variety of choices on types of chemistries, charger topologies and charge management solutions. Selecting the most suitable solution should be a simple task, but in most cases, it is a more complicated process. The designer needs to reach an optimal balance between performance, cost, form factor and other key requirements.

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Supercapacitors Replace Batteries with Help of 3mm × 3mm Charger

September 8, 2009 5:51 am | by Jim Drew, Sr. Applications Engineer, Linear Technology | Comments

Supercapacitors are finding their way into an increasing number of applications for short-term energy storage. One such application is a power ride-through circuit, in which a backup energy source cuts in and powers the load when main power supply fails for a short time. This type of application has been dominated by batteries in the past

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Choosing the right IGBT Trade-Offs to maximize Motor Drive performance

September 8, 2009 5:29 am | by Vijay Bolloju, Jun Yang , & Elk Kabaker, IGBT Applications Engineering group, International Rectifier | Comments

Recent advances in IGBT technology have given motor drive designers more options to consider for system development.  Different specification conventions of various vendors complicate the design process further.  Conventionally, system efficiency has been equated directly with VCEON.  This metric is important for calculating the conduction losses of an IGBT but leaves out switching losses completely.

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Constant Current Regulation delivers HB-LED advances

September 4, 2009 8:23 am | by Tim Kaske & Paul Decloedt, On Semiconductor | Comments

In recent years significant advances in high-brightness LEDs (HB-LEDs) have given designers the opportunity to replace conventional incandescent, fluorescent and halogen technologies with more reliable and energy-efficient LED-based alternatives. As a result, solid-state lighting has seen considerable uptake in automotive, digital signage, and architectural applications, as well as the illumination of our city streets.

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Power over Camera Link Standard Saves Space in Factory Floor Machinery

September 2, 2009 11:35 am | by Dan Cronch, Product Development Specialist, 3M Electronic Solutions Division | Comments

In Japan, space is a precious commodity. In the manufacturing setting, companies strive to make the most of every square inch. To that end, the Japan Industrial Imaging Association (JIIA) led the development of the Power over Camera Link (PoCL) Interface Standard for digital cameras and frame grabbers used in Machine Vision systems.

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SuperSpeed USB: A USB 3.0 Update

September 2, 2009 7:35 am | by Jon Titus, Senior Technical Editor | Comments

SuperSpeed USB connections — coming in 2010 — will zip data between devices at a theoretical rate of 5 Gbps, or more than 10-fold faster than a high-speed USB 2.0 connection. The faster transfers could help embedded-system developers who design video kiosks, TV recorders/players, and test-and-measurement equipment that use large quantities of information.

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Tennis Players Encouraged to Watch what they Tweet

August 31, 2009 7:56 am | by Jason Lomberg, Technical Editor | Comments

Even tennis isn’t sacrosanct—competitors in the US Open are being warned to watch what they tweet. The warning is purportedly to ensure compliance with tennis’ “Anti-Corruption Program Rules.” Posted in conspicuous locations, the warning reads: "Many of you will have Twitter accounts in order for your fans to follow you and to become more engaged in you and the sport...

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Try before you buy: MP3s and digital media rights

August 25, 2009 9:56 am | by Jason Lomberg, Technical Editor | Comments

The UK is considering a law that would force ISPs to cut off service to those accused of illegally downloading movies and/or music. This has the potential to reignite an old debate—one that’s persisted since the term “digital media” was invented. Our handling of this issue has profound ramifications for the future of the entertainment industry.

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Selecting the Right Rapid Prototyping System

August 21, 2009 6:01 am | by Scot Thompson, Solid Concepts, www.solidconcepts.com | Comments

When I started in the rapid prototyping industry with 3D Systems in March of 1989 it was just months after the very first SLA system, the SLA-1, was introduced at the Autofact Show in Detroit in 1988. This first rapid prototyping system was invented by Chuck Hull, an engineer trained in photosensitive polymers.

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Crosstalk in Multi-Channel High-Speed ADCs

August 13, 2009 10:13 am | by Chuck Sanna, Product Marketing Engineer, Texas Instruments | Comments

In the push to increase bandwidth, range and sensitivity in wide bandwidth systems, multi-antenna and multi-sensor arrays are becoming increasingly popular. With each antenna or sensor requiring its own signal chain, many analog-to-digital converter (ADC) suppliers are integrating multiple high-speed ADCs into a single IC design.

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Filter Design Tools and Wizards

August 13, 2009 9:53 am | by Hank Zumbahlen, Sr. Staff Applications Eng., Analog Devices | Comments

Filters are common in electronic equipment. From antialiasing filters used before A to D converters, to reconstruction filters after D to A converters, to intermediate frequency (IF) strips applications for filters are everywhere. The common thread is the desire to pass some frequencies, while blocking others. An ideal filter will have an amplitude response that is unity (or at a fixed gain) for the frequencies of interest

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Design Talk - Circuits

August 12, 2009 6:00 am | Comments

When designing at the board level, there are always new things to consider. Here are some essays on design to help you in your work.

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Thermal Management Strategies for Extreme 3U cPCI Embedded System Applications

August 5, 2009 6:47 am | by Barbara Schmitz, MEN Mikro Elektronik | Comments

As the cooling challenges of 3U CompactPCI (cPCI) embedded system applications multiply due to increased processing power, reduced package sizes and more hostile environments, new thermal management options and industry standards continue to evolve. Chip and board manufacturers have already done a vast amount of work to mitigate thermal management concerns.

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Modules Simplify RF Designs

August 4, 2009 10:01 am | by Jon Titus, Senior Technical Editor | Comments

Ready-to-use wireless modules provide a way to quickly get a design "on the air" when engineers find RF circuits and communication protocols fall outside their areas of expertise. Even when engineers have RF experience, a module still might make sense from the perspective of saved time and money.

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