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Analog Design

News and design information for analog design engineers, including those working on signal-chain, power, interface, and RF issues.
Top Story
Top Story

Shaping edges 11/12/2009

There are many ways to make properly shaped signal edges, but they are each equivalent to some linear filtering operation.

News

1G-sample/sec, 12-bit ADC works in base stations and instrumentation 11/10/2009

Targeting applications in wireless-communications, defense, and test-and-measurement equipment, Texas Instruments recently announced the 12-bit, 1G-sample/sec ADS5400 ADC with 2.1-GHz input bandwidth.

Quad power-converter-control chip uses PMBus. 11/10/2009

Maxim’s new MAX16064 monitoring-and-control chip supervises four analog switching power converters.

Online power-supply-design tool evaluates 48 billion designs 11/9/2009

National Semiconductor has made significant improvements to its free Webench online-design tool, which operates with most popular Web browsers.

16-bit, dual-channel ADCs span 20M to 80M samples/sec 11/4/2009

Analog Devices’ new AD9269 family of 20M-, 40M-, 65M-, and 80M-sample/sec pipeline ADCs takes 16-bit samples.

3.3V mixer downconverts RF with good linearity 10/28/2009

Linear Technology Corp’s new LTC5541 downconverting mixer operates at frequencies of 1.3 to 2.3 GHz, and the company plans to later introduce pin-compatible parts that will operate at 0.6 to 4 GHz.
In-Depth

Using high-current integrated-switch power-regulator ICs 10/22/2009

Learn the thermal considerations so you don't get burned.

Specify an external reference clock to improve SERDES performance 10/21/2009

Various serial data standards require different clock specifications.

Comparing comparators: Measure signals, get results 10/8/2009

Simple in concept, voltage comparators have myriad specifications that complicate their application.

A new set of Sallen-Key filter equations 10/1/2009

New design equations let you pick equal capacitor values and solve for the resistors to achieve any desired gain in one stage.

Draw the line: Isolation shields systems from shocking surprises 9/3/2009

You must design isolation into your circuits if you want to ensure user safety, eliminate ground loops, and reduce noise. Before selecting a technology, make sure that you understand all the specs and design considerations.
Experts

Take a risk; throw away those bits! 10/22/2009

You can create a 12-bit system using a 24-bit converter and eliminate the need for analog gain and level-shifting circuits.

Real signals 10/8/2009

The piecewise-linear step starts with a jerk, mindlessly follows a perfectly uniform ramp, and smacks hard into its upper limit. Real signals don't do that.

A designer's guide to op-amp gain error 9/17/2009

When selecting the proper operational amplifier for your circuit, you need to know how much gain error your design can tolerate.

Sliding edge 9/3/2009

Boards with different transmission-line geometries require special techniques. Here's how to cope when high-speed signals reflect due to the sudden change in board properties as they move across the connection.

One circuit provides system resolution and 12-bit accuracy 8/20/2009

Handheld meters, data loggers, and automotive and monitoring systems typically require a multiplexed system with good accuracy and high system resolution. Is it possible to get this mixture of requirements into one circuit?
DesignIdeas

Convert signals to proper logic levels 2/5/2009

Reduce digital-voltage levels to those compatible with microcontrollers.

Flying capacitor and negative time constant make digitally programmable-gain instrumentation amplifier 2/5/2009

Digitally programmable-gain instrumentation amplifiers prevent common-mode noise and variable signal amplitudes.

Voltage doubler improves accuracy 2/5/2009

A transistor's low saturation voltage results in less loss.

Linear wind-power meter compensates for temperature 11/13/2008

Using a free-spinning anemometer for wind speed and a diode-connected transistor for temperature sensing, this meter measures the wind power available for "green" power generation.

Oscillator uses dual-output current-controlled conveyors 11/13/2008

Varying the bias current of dual-output current-controlled conveyors controls the frequency of oscillation of the circuits.
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Events

Design for Testability and for Built-In Self Test

Dates: 12/8/2009 - 12/10/2009
Location: Los Angeles, CA

Advanced Analog IC Design course

Dates: 1/6/2010 - 1/9/2010
Location: HKUST, Hong Kong

IMI's 21st Annual Thermal Printing Conference

Dates: 2/1/2010 - 2/3/2010
Location: Chandler, AZ, USA

CDMA and EV-DO Technology

Dates: 2/8/2010 - 2/10/2010
Location: San Jose, CA


EDN TECH CLIPS


Learn about the emerging board-level technology in a video produced for EDN by Curtiss-Wright Controls Embedded Computing, one of the core members of the VITA 46 specification development team. ; FA-22; VITA 46; VMEbus connectors; board-level design; design idea videos; fighter jet; joint strike; The quartz crystals prevalent in cell phones and PCs work with currents that max out at 1 µA. With such a small full-scale current range, a tiny error in the current a circuit sends through the crystal can result in a terribly inaccurate clock.; cell phones; computer clocks; jim williams; linear technology; nanoamps; quartz crystals; video design idea; Mark Thoren, mixed-signal application engineering manager with Linear Technology, demonstrates an amplifier-based circuit design for a relatively inexpensive precision voltage source.; Mark Thoren; amplifier-based circuit design; linear technology; mixed-signal application; precision voltage source; Ed Sperling, Editor In Chief of Electronic Business and Electronic News, gives you a behind-the-scenes look at the making of our annual Movers and Shakers publication.; EDN; EDN.com; Ed Sperling; Electronic Business; Electronic News; Movers and Shakers; Short videos with high technical value, including Video Design Ideas. http://link.brightcove.com/services/link/bcpid1078600052 http://www.brightcove.com/channel.jsp?channel=959007201

Blog

Anablog

Sunstone improves the PCB123 CAD tool

I got a note from the ebullient Amber Roberts over at Lane PR regarding some significant improvement that Sunstone has made to its free PCB design ... 

Ultrasound does active wound healing

I came across a neat article in Forbes where researchers are using ultrasound to stimulate blood flow and heal chronic wounds. This is just another... 

Never misplace your remote control again

My CTO buddy John Haggis over at Aerielle sent a link with a great idea on a product that will mean you will never lose your remote control again. ... 



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