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Analog Dialogue, Volume 47, Number 3
Analog Dialogue, Volume 47, Number 3
Analog Dialogue, Volume 47, Number 3
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Analog Dialogue, Volume 47, Number 3

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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 47, Number 3, 2013

LanguageEnglish
Release dateNov 7, 2013
ISBN9780916550424
Analog Dialogue, Volume 47, Number 3
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 47, Number 3 - Analog Dialogue

    ANALOG DIALOGUE

    VOLUME 47, NUMBER 3

    Jonathan Pearson

    Charly El-Khoury

    Henry He

    Rosemary Ryan

    Ben Wang

    Ray Sun

    Scott Wayne, Editor

    * * * * *

    Published by Analog Devices on Smashwords

    * * * * *

    Analog Dialogue

    Volume 47, Number 3

    Copyright © 2013 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 Current Feedback Amplifiers in Photocurrent Applications

    Current feedback amplifiers (CFA) are not typically used as transimpedance amplifiers due to their relatively high inverting input current and current noise. CFAs are easy to use, however, and can outperform their voltage feedback counterparts in applications that require high gain, low power, low noise, wide bandwidth, and high slew rate. This article shows how to properly compensate CFAs.

    Amplifier Disable Function Eliminates Need for Multiplexers in Multichannel Applications

    A multiplexer routes the signal from one of several inputs to a common output. Many applications use amplifiers to condition the signal before the mux. In these cases, amplifiers with a disable function can be used to select the channel, eliminating the need for a mux—reducing cost, PCB area, and distortion. This article presents the challenges of using op amps with a disable function for channel selection.

    Minimizing Errors in Multiplexed 3-Wire RTD Data-Acquisition Systems

    In a programmable logic controller or a distributed control system, one data-acquisition module may monitor the temperature of many remotely located resistance temperature detectors (RTDs). The best accuracy will be obtained when each RTD has its own excitation circuit and ADC, but the module will be large, expensive, and power hungry. Multiplexing leads to a smaller, lower cost, lower power module.

    System Demonstration Platform Eases Transition from Evaluation to Prototyping

    To simplify selecting components for new designs, Analog Devices provides evaluation boards and application software, but the best way to save time and increase the chance of success is to have the code and interface ready before the board is built. The System Demonstration Platform was designed to allow this type of prototyping, making it simpler than ever to kick start system development.

    Reduced Integration Time Improves Accuracy in Dead Reckoning Navigation Systems

    Automotive dead reckoning navigation systems use gyroscopes to estimate the vehicle’s instantaneous heading. Combined with the distance traveled, this allows the navigation system to correctly determine the vehicle’s position when the satellite signal is blocked. If the satellite signal is lost for a long time, the accumulated angle error will become large. This article offers a simple way to minimize this problem.

    How to Design and Debug a Phase-Locked Loop (PLL) Circuit

    Designing and debugging a phase-locked loop (PLL) circuit can be

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