Feedback in Analog Circuits
This book describes a consistent and direct methodology to the analysis and design of analog circuits with particular application to circuits containing feedback. The analysis and design of circuits containing feedback is generally presented by either fol
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Feedback in Analog Circuits
Feedback in Analog Circuits
Agustin Ochoa
Feedback in Analog Circuits
Agustin Ochoa XACT Vista, CA, USA
ISBN 978-3-319-26250-5 ISBN 978-3-319-26252-9 DOI 10.1007/978-3-319-26252-9
(eBook)
Library of Congress Control Number: 2015955840 Springer Cham Heidelberg New York Dordrecht London © Springer International Publishing Switzerland 2016 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. Printed on acid-free paper Springer International Publishing AG Switzerland is part of Springer ScienceþBusiness Media (www.springer.com)
To Dad, Jess, and Basilio, I miss you To Buck To Mom To Sonia, Diane, and David And always, to Norma
Preface
The path to becoming an analog designer is long, winding, and narrow. It is not well marked and has many exits to other specialties and lines of work. Mostly it is a lonely experience punctuated with periods of intense scrutiny when the design fails to meet a specification. Experience is the key. But where do we get it? We are taught basic tools, such as the Kirchhoff nodal and loop analysis, device models, matrix resolutions, and lots of tricks. What can we simplify, ignore, and approximate? Then we simulate over all imagined conditions and environments. But this process is not satisfying. We use tricks everyone else knows and uses, attributed to someone else, that usually work. Mostly. Matrix analysis produces a jumble of literals that do not easily reveal design trade-offs, and simulation results are even worse with everything done in the background. Developing design insight is difficult. This book presents a tool to be used in this effort—the Driving Point Impedance/ Signal Flow Graph method (DPI/SFG). This tool, as with all tools, is sharpened with use, and its application becomes secondary allowing the circuit to maintain central focus. With this tool, a circuit is mapped onto a flow graph, a pictorial schematic showing circuit couplings and circuit topology. Loops show feedback, and summers show where an
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