CONTENTS January 2012
 
Cover Story 
Medical sensors in biomedical electronics: The brain, heart and lungs
Steve Taranovich, Contributing Editor, EDN
Electronic, biological and medical technologies collaborate to benefit people suffering from brain, heart and lung deficiencies.
 
Design Feature 
Science fiction future of medical implants
Steve Taranovich, Contributing Editor, EDN
Semiconductor solutions contained in portable consumer electronics are now finding their way into medical implants.
Mobile apps eyed as next-gen engineering tool
Martin Rowe, Senior Technical Editor, Test & Measurement World; EDN
Mobile apps show great promise as the next wave of measurement instruments, reference tools, computational tools, simulators, and system controllers.
Energy conservation spurs LED lighting acceptance
Margery Conner, Technical Editor, EDN
Japan is moving towards a faster acceptance of LED lighting as energy is restored to homes and businesses. The global community, however, questions whether nuclear is a safe alternative to carbon-intensive fuels.
LED drivers are making that glow happen
Bill Schweber, Editor, EE Times' Planet Analog
The diversity and application-optimization of LED drivers are starting to resemble their analog cousins of op amps and A/D converters.
Ultra-low-power wireless makes inroads into many applications
Janine Love, Editor, EE Times' RF/Microwave Designline
Low-power and ultra-low-power wireless devices continue to improve our 'quality of experience' in life, by giving us peace of mind, convenience, and new forms of entertainment.
The hottest trends in programmable logic
Clive Maxfield, editor of EE Times' Programmable Logic Designline
New chips are both bigger than anything we've seen before in capacity and performance and smaller than anything we've seen before in capacity and packaging.
Automotive electronics: What's hot in 2012
Rick DeMeis, Editor, EE Times' Automotive Designline
2012 looks to be a year of consolidation as technologies introduced previously – like voice recognition and electrified power trains - become more widespread across model lines.
Audio performance advances in portables
Rich Pell, Editor, EE Times' Audio Designline
Mobile audio quality is being addressed on several fronts, including portable devices’ built-in hardware and software/processing capabilities, as well as media quality itself.
MCUs: High-end devices flourish
Colin Holland, Editor, EE Times' MCU Designline
It is the balance between the traditional technologies and the newer kid on the block - ARM - that is providing an area of interest.
PC board materials and processing as hot technology
Paul Rako, Technical Editor, EDN
Exotic substrates and fabrication methods are now commonplace.
Battery-charge control: dedicated ICs or microcontrollers?
David Gunderson, Micro Power Electronics, Inc.
To reduce current requirements, designers of batteries for electric vehicles, large-system back power, and other high-power-requirement applications build batteries from high-series-count cell stacks.
Medical sensors in biomedical electronics: The eye and ear
Steve Taranovich, Contributing Technical Editor, EDN
Eye, ear, lung, heart, and brain enhancements are now possible as modern electronics technology meets advances in medicine and biology.
Product design constraints and optimization
Avinash Babu, Sr. Architect, Mistral Solutions Pvt. Ltd.
The designer needs to find a point on the technology curve that matches with the ecosystem and the customer use case.
 
Special Report 
Voices: Bill McClean---Don't broad-brush the semiconductor market
Suzanne Deffree, Managing Editor, Online, EDN
Bill McClean, president of market-research company IC Insights, estimates the semiconductor-industry growth, expectations for 2012, and why the always-complex semiconductor market cannot be judged on just one of its aspects. Excerpts of that conversation follow:
Baker's Best: Designing with temperature sensors: thermocouples
Thermocouples offer advantages over other temperature sensors such as thermistors, RTDs, and silicon sensors.
Prying Eyes: Unleashing the power of Tegra-2
Patrick Mannion, Director of Content, EDN
The less-than-$300, Android 2.2-based ViewSonic gTablet has the horsepower to make it competitive with high-end devices—that is, if you have the stomach and time for rooting and hacking.
Mechatronics in Design: What is IT?
Dr. Kevin C. Craig, EDN
The technology of information enables mechatronic problem solving.
Tales from the Cube: It's a bird! It's a crane!
Earl Schlenk, Engineer
This tale recounts how a cigarette break resolved a perplexing microwave failure.
Signal Integrity: Quadrature-via layout
Dr. Howard Johnson, EDN
Quadrature layout does nothing to mitigate common-mode crosstalk, but at least it nails the differential mode.
Inside Nanotechnology: Driving toward millivolt electronics
Pallab Chatterjee, Contributing Technical Editor, EDN
Researchers at the University of California-Berkeley are developing devices that will yield a millionfold reduction in power for future electronic systems.
Supply Chain: Counterfeit components cost more than US dollars, SIA testifies
Suzanne Deffree, Managing Editor, Online, EDN
The more than $7.5 billion counterfeiting costs US-based semiconductor companies each year is not the biggest loss, according to recent Senate testimony by Brian Toohey, president of the SIA.
Tales from the Cube: When the sun shines on the machine
Clark S. Robbins, GS Engineering
Thermal deformation occurs in a hydraulic-control system that operates in the sunlight.
 
Pulse 
HB-LED-driver chip set provides dimming, PFC
Bill Schweber, EETimes
The device combines a critical-conduction mode, PFC controller, and half-bridge resonant controller with built-in 600V driver.
Wireless telemetry monitors dragonflies at the neuron level
Margery Conner, Technical Editor, EDN
The HHMI researchers gather information by attaching tiny electrodes to cells in the dragonflies’ neural cord and recording the electrical activity of the neurons and muscles.
Multimeasurement enhances VSA software
Colin Holland, EE Times
The 89600 VSA software’s multimeasurement capability provides the power of multiple signal analyzers using one user interface.
Instrumentation-amp arena gets a new player
Bill Schweber, EE Times
The on-chip mCal calibration circuit enables low initial-offset voltage and a means to control offset drift, which results in higher accuracy across time and temperature.
Four-channel DSOs boast CAT-III isolation, 5G-sample/sec acquisition
Dan Strassberg, Contributing Technical Editor, EDN
Tektronix considers the THS3000s to be scopes rather than combination scopes/DMMs.
Kindle Fire enables nonfiction e-books
Margery Conner, Technical Editor, EDN
Kindle is great for reading books that are all text, which is 99% of fiction, and lots of nonfiction.
Efficient P-channel MOSFET comes in a small package
Bill Schweber, EE Times
The 12V DMP1245UFCL P-channel enhancement-mode MOSFET from Diodes targets battery-powered applications in which runtime and overall life are critical factors.
Flyback topology offers superior balance in LED drivers
Peter B. Green, International Rectifier Corp.
Flyback LED drivers offer simplicity, low cost, ability to achieve a high power factor, and compatibility with common TRIAC-based dimmers.
GTRI opens compact range for antenna, radar-cross-section measurements
Fran Granville, Senior Associate Editor, EDN
The EMI-shielded facility will also be used for defense-related research projects and collaborations with outside organizations.
Customized data-acquisition system for only $30
Casey Hare, Angstrom Designs
Angstrom Designs has recently released a free driver that turns the Arduino into data-acquisition hardware.
Capacitive sensor supports different temperatures
ZMDI’s ZSSC3123 IC suits MEMS-based elements such as pressure sensors for hydraulic-control systems, humidity, and liquid-level gauges.
SAS controllers feature security, encryption abilities
Rick Merritt, EE Times
PMC-Sierra’s ICs also help control other storage functions such as compression and de-duplication.
Boost-charger IC targets nanopower energy harvesting
TI’s bq25504 IC benefits wireless-sensor networks for area, industrial, water/waste, and structural monitoring along with consumer, high-reliability, and medical applications.
Kinetis microcontrollers operate at 200MHz frequencies
Colin Holland, EE Times
Freescale’s Kinetis X addresses virtually any type of external memory including NOR and NAND flash, serial flash, SRAM, and low-power DDR2 and DDR3.
Hot-swap I2C-bus buffers provide high noise margins
Linear Technology's LTC4313 and LTC4315 are suited to computing, networking, and data-storage systems that use multiple I/O cards with different supply- and bus-voltage levels.
 
Design Ideas 
VFC features good linearity and dynamic range
Jordan Dimitrov, Toronto, ON, Canada
A voltage to frequency converter circuit builds on the work of two analog greats.
Mains-driven zero-crossing detector requires few high-voltage parts
Luca Matteini, Agliana, Italy
Using this simple circuit, one can get isolation with low power consumption.
Build an op amp with three discrete transistors
Lyle Russell Williams, St. Charles, MO
The simple ac-coupled design inverts, runs off a single supply, and is self-biasing.
Diode ladder multiplies voltage under software control
An eight-pin micro multiplies, monitors, and delivers boosted voltage to load.
Charger extends lead-acid-battery life
Fran Hoffart, National Semiconductor Corp., Santa Clara, CA
A circuit that properly charges sealed lead-acid batteries ensures long, trouble-free service.
Circuit provides more accurate multiplication
Yakov Velikson, Lexington, MA
Convert into and out of the sampled-data domain to get an accurate multiplication.
A few added components make a self-contained controller for 100A load
Steve Hageman, AnalogHome.com, Windsor, CA
Add a few components and you have a stand-alone piece of test gear.
Simple night-light detects dusk via photoresistor
Chau Tran, Analog Devices, Malden, MA
You can adjust this battery-powered circuit for different levels.
Simple tester checks Christmas-tree lights
William Dias, Brown&Sharpe, North Kingstown, RI
Why is it that you always test 48 bulbs before you find the bad one in a 50-light string? This simple circuit allows you to divide and conquer, greatly reducing the time it takes to find the bad bulb.


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Power Technology E-newsletter 
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Analog E-newsletter 
12V Dual-channel Synchronous Buck Converter Features Integrated FETs
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Power MOSFETs features reduced top-side thermal impedanc
EDNA, January 10
 
     
 
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