Design Center

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

Diagnostic ultrasound gets smaller, faster, and more useful 6/25/2009

The signal path in ultrasound machines is a multichannel transmitter-receiver system with blazingly fast data rates. Engineers need to weigh a host of options in designing these complex machines.

News

Analog Devices, Infineon collaborate on air-bag systems 6/25/2009

Analog Devices and Infineon Technologies have collaborated to produce next-generation automotive-air-bag systems. In the immediate future, the two companies will produce a hardware platform using parts from each company’s current offerings. Designers will be able to adopt this platform to begin development of code using a well-defined software interface.

SIwave 4.0 addresses signal and power integrity 6/17/2009

Part of the Ansys’ Ansoft family of products, SIwave (signal-integrity-wave) Version 4.0 includes new features for signal-integrity, power-integrity, and electromagnetic-compatibility testing.

Chip allows isolated USB 5/28/2009

Analog Devices’ new ADuM4160 bidirectional isolator provides UL (Underwriter Laboratories) 1577-rated, 5-kV isolation for 1.5 or 12-Mbps USB (Universal Serial Bus)-data lines.

Two-terminal current source supplies 200 mA. 5/19/2009

Linear Technology Corp’s new LT3092 two-terminal current source can supply 0.5 to 200mA of current at a 1% initial accuracy.

Op amp has offset calibration to 200 μV 5/18/2009

Microchip Technology’s new MCP651/2/5 operational amplifier targets use in microphone preamplifiers, optical-detector circuitry, digital scales, industrial instrumentation, H-bridge drivers, bar-code scanners, transmission-line drivers, and medical equipment for patient monitoring and ultrasound functions.
In-Depth

Characterize optocouplers in the feedback loop of high-frequency power converters 6/19/2009

Optocouplers will add a phase shift that can make your power supply unstable. Here is how you can measure and compensate the loop.

Stress out; strain gauges in 5/28/2009

The careful selection and application of strain gauges can ensure good results from this difficult measurement.

Use alternative approaches to evaluate dc/dc synchronous buck converters 4/23/2009

Linear systems, online tools, and full simulations help you analyze your designs.

Online tools home in on analog design 4/9/2009

Analog design gets easier and more convenient, thanks to free web applications and downloadable tools.

Whatever happened to my dynamic range? 3/19/2009

If your testing results don't closely approximate the silicon vendor's specification claims, question your assumptions before concluding that your supplier is inflating the numbers.
Experts

Is your amplifier offset way out of whack? 6/25/2009

Consider trying to explain offset error by reexamining your amplifier's specifications.

Can’t see the forest ... 6/25/2009

Analog design is all about trade-offs, so system-design expertise is vital to any company offering analog chips.

Endpoint distortion 6/11/2009

The end termination improves short-term response, but round-trip reflections may interfere with subsequent bits.

The non-negotiable single-supply operational amplifier 5/28/2009

Analog devices that serve applications such as high-resolution delta-sigma or SAR (successive-approximation-register) converter systems are feeling the crunch from amplifiers that have difficulty with achieving good rail-to-rail input performance.

Driving-point impedance 5/14/2009

The endpoint effect delays the received signal.
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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Blog

Anablog

The next killer app? How about three of ‘em?

As I visited the IEEE IMS show about microwaves and RF last week I could see a very bright future for semiconductors and electronics. For years pun... 

Webinar on measuring headphone levels to prevent hearing damage

The formidable Susan Sillitoe sent along a press release informing us that Prism Sound, an audio testing company, will be giving a webinar on June ... 

Eric Bogatin signal integrity classes in Oregon

EDN contributor Eric Bogatin sent along an email notifying me that he will be in Hillsboro Oregon August 11-14. He will be giving two classes; cost... 



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