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Volume 48 ó November 2014

Timely Information

Application Notes

Circuits from the Lab

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Analog Dialogue--Since 1967

Feature Articles: Products, Applications, Technology, and Techniques

Synchronous Detectors Facilitate Precision, Low-Level Measurements

Synchronous detectors can extract small signals, buried in the noise, to measure properties such as very small resistance, light absorption or reflection against bright backgrounds, or strain accompanied by high noise levels. The noise often increases as the frequency nears zero. Moving the measurement away from the low-frequency noise increases the SNR, allowing weaker signals to be detected.

RF-to-Bits Solution Offers Precise Phase and Magnitude Data for Material Analysis

When analyzing materials in remote locations, placing probes within the material may not be viable. A high-frequency transceiver can provide a practical method for accurately quantifying the materialís volume fractions without the adverse effects of direct exposure to the material. Quadrature demodulators offer a novel, robust way to measure magnitude and phase shift.

...Recent Feature Articles: Products, Applications, Technology, and Techniques

Feature Articles: Design Ideas, Tutorials, Measurement Techniques

ADC Modeling Tools Speed Up Evaluation

System designers are faced with a common dilemma: design a new product on a known platform, making only minor changes; or use a brand-new platform with the most advanced products and capabilities. A new suite of simulation tools now enables quick prototyping in software, minimizing development risk, providing confidence that products will work as expected, and delaying hardware decisions to save time and money.

Two New Devices Help Reinvent the Signal Generator

In the past, the most difficult part of an arbitrary waveform generator was designing the output stage. Typical signal generators offer output ranges from 25 mV to 5 V. To drive a 50-Ω load, traditional designs used high-performance discrete devices, a large number of integrated devices in parallel, or an expensive ASIC. Now, amplifiers can drive these loads, reducing output stage complexity.

...Recent Feature Articles: Design Ideas, Tutorials, and Measurement Techniques

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Analog Dialogue is the technical magazine of Analog Devices. It discusses products, applications, technology, and techniques for analog, digital and mixed-signal processing.

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