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    Analog Dialogue, Volume 46, Number 4: Analog Dialogue, #8
    Analog Dialogue, Volume 46, Number 4: Analog Dialogue, #8
    Analog Dialogue, Volume 46, Number 4: Analog Dialogue, #8
    Ebook86 pages44 minutes

    Analog Dialogue, Volume 46, Number 4: Analog Dialogue, #8

    By Analog Dialogue

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    Analog Dialogue -- A Forum for the Exchange of Circuits, Systems, and Software for Real-World Signal Processing Analog Dialogue is the technical magazine of Analog Devices. It discusses products, applications, technology, and techniques for analog, digital and mixed-signal processing. This is Volume 46, Number 4, 2012

    LanguageEnglish
    PublisherAnalog Dialogue
    Release dateFeb 13, 2013
    ISBN9780916550394
    Analog Dialogue, Volume 46, Number 4: Analog Dialogue, #8
    Author

    Analog Dialogue

    Analog Dialogue, www.analog.com/analogdialogue, the technical magazine of Analog Devices, discusses products, applications, technology, and techniques for analog, digital, and mixed-signal processing. Published continuously for 45 years—starting in 1967—it is available in two versions. Monthly editions offer technical articles; timely information including recent application notes, new-product briefs, pre-release products, webinars and tutorials, and published articles; and potpourri, a universe of links to important and relevant information on the Analog Devices website, www.analog.com. Printable quarterly issues and ebook versions feature collections of monthly articles. For history buffs, the Analog Dialogue archive, www.analog.com/library/analogdialogue/archives.html, includes all regular editions, starting with Volume 1, Number 1 (1967), and three special anniversary issues. To subscribe, please go to www.analog.com/library/analogdialogue/subscribe.html. Your comments are always welcome: Facebook: www.facebook.com/analogdialogue; Analog Diablog: analogdiablog.blogspot.com; Email: [email protected] or Scott Wayne, Publisher and Editor [[email protected]].

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      Book preview

      Analog Dialogue, Volume 46, Number 4 - Analog Dialogue

      ANALOG DIALOGUE

      VOLUME 46, NUMBER 4

      Charly El-Khoury

      Alan Walsh

      Brian Kennedy

      John Kruse

      Catherine Redmond

      Sandro Herrera

      Moshe Gerstenhaber

      Tracey Johnson

      Dan Sheingold, Editor

      Scott Wayne, Editor

      * * * * *

      Published by Analog Devices on Smashwords

      * * * * *

      Analog Dialogue

      Volume 46, Number 4

      Copyright © 2012 by Analog Devices

      * * * * *

      Smashwords Edition License Notes

      Thank you for downloading this free ebook. You are welcome to share it with your friends. This book may be reproduced, copied, and distributed for non-commercial purposes, provided the book remains in its complete original form. If you enjoyed this book, please return to Smashwords.com to discover other works by this author. Thank you for your support.

      Table of Contents

      Compensating Amplifiers That Are Stable at Gain ≥ 10 to Operate at Lower Gains

      This article shows how compensating an amplifier that is normally stable with a gain higher than +9 to operate with a gain as low as +2 provides higher slew rate and faster settling time than an equivalent internally compensated amplifier. The two methods presented here trade complexity for total wideband noise. The ADA4895-2 dual high-speed, low-power operational amplifier is used as an example.

      Front-End Amplifier and RC Filter Design for a Precision SAR Analog-to-Digital Converter

      Successive-approximation ADCs offer high resolution, excellent accuracy, and low power consumption. Once a particular precision ADC has been chosen, system designers must determine the support circuitry needed to obtain the best results. The three principal areas to consider are the front end, the voltage reference, and the digital interface. This article focuses on the front end.

      Implementing an Isolated Half-Bridge Gate Driver

      Many applications, ranging from isolated dc-to-dc power supplies to solar inverters, use isolated half-bridge gate drivers to control large amounts of power with high efficiency, power density, isolation voltage, and long-term reliability. This article discusses details of these design concepts to illustrate the ability of isolated half-bridge gate driver ICs to provide high performance in a small package.

      Detecting and Distinguishing Cardiac Pacing Artifacts

      When heart patients undergo ECG testing, the cardiologist must be able to detect the presence and effects of a pacemaker. The electrical signature of the pacing signal consists of small, narrow pulses. Buried in noise and larger cardiac signals, these artifacts can be difficult to detect. This article describes the nature of pacing artifacts and introduces a device and method for detecting them.

      Versatile, Low-Power, Precision Single-Ended-to-Differential Converter

      Many applications, including driving modern ADCs, transmitting signals over twisted-pair cables, and conditioning high-fidelity audio signals, require differential signaling, which achieves higher signal-to-noise ratios, increased common-mode noise immunity, and lower second-harmonic distortion. This article offers a circuit block that can convert single-ended signals to differential signals.

      HART Communication Networks Are Improved by Small, Flexible, Low-Power Modem ICs

      Measurement, control, and communication with instrumentation systems employing sensors and actuators is the backbone of modern manufacturing plants. Communication employing 4-mA-to-20-mA analog signals has long been in widespread use, but instrumentation has matured from those purely analog systems to today's smart systems that use the HART protocol to enable two-way digital data.

      Compensating Amplifiers That Are Stable at Gain ≥ 10 to Operate at Lower Gains

      By Charly El-Khoury

      This article shows how compensating an amplifier—such as the ADA4895-2, which is normally stable for a gain higher than +9—to operate with a gain as low as +2 provides higher slew rate and faster settling time than an equivalent internally compensated amplifier. Two methods will be presented, and advantages and disadvantages of each circuit will be highlighted.

      The ADA4895-2, a device in the same family as the ADA4896-2, ADA4897-1, and ADA4897-2, is a dual low-noise, high-speed, voltage-feedback amplifier with rail-to-rail outputs. Stable with a minimum gain of 10, it features 1.5-GHz gain-bandwidth product, 940-V/µs slew rate, 26-ns settling time to 0.1%, 2-nV/√Hz 1/f noise at 10 Hz, 1-nV/√Hz wide band noise, and

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