STAN GIBILISCO
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`Front 4/9/01 4:38 PM Page i
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`The
`Illustrated Dictionary of
`Electronics
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`Front 4/9/01 4:38 PM Page iii
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`The
`Illustrated Dictionary
`of Electronics
`
`Eighth Edition
`
`Stan Gibilisco
`Editor-in-Chief
`
`McGraw-Hill
`New York Chicago San Francisco Lisbon London Madrid
`Mexico City Milan New Delhi San Juan Seoul
`Singapore Sydney Toronto
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`PACT - Ex. 2013.0004
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`Front 4/12/01 4:38 PM Page iv
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`Cataloging-in-Publication Data is on file with the Library of Congress
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`McGraw-Hill
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`Copyright © 2001 by The McGraw-Hill Companies, Inc. All rights reserved. Printed in the United States of
`America. Except as permitted under the United States Copyright Act of 1976, no part of this publication
`may be reproduced or distributed in any form or by any means, or stored in a data base or retrieval system,
`without the prior written permission of the publisher.
`
`1 2 3 4 5 6 7 8 9 0
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`AGM/AGM 0 9 8 7 6 5 4 3 2 1
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`P/N 0-07-137237-7
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`ISBN 0-07-137236-9
`
`The sponsoring editor for this book was Scott Grillo, and the production supervisor was Pamela Pelton. It
`was set in Bookman by Techbooks.
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`Information in this book has been obtained by the publisher
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`publisher nor the authors guarantee the accuracy or complete-
`ness of any information published herein. Neither the publisher
`nor the authors shall be responsible for any errors, omissions, or
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`lished with the understanding that the publisher and authors
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`5059F-pD-163-223 4/9/01 5:22 PM Page 173
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`decommutator • definite-purpose component 173
`
`decommutator A circuit or device for performing
`decommutation, including demodulators, demul-
`tiplexers, and signal separators.
`decoupler A device that isolates two circuits so
`that a minimal amount of coupling exists be-
`tween them.
`decoupling The elimination or effective minimiza-
`tion of coupling effects, as in decoupling amplifier
`stages to prevent interaction through a common
`power-supply lead.
`decoupling capacitor 1. A capacitor that provides
`a low-impedance path to ground to prevent
`undesired stray coupling among the circuits in a
`system. 2. The capacitive member of a resistance-
`capacitance (RC) decoupling filter.
`decoupling filter A resistance-capacitance (RC) fil-
`ter, usually inserted into a common dc line in a
`multistage amplifier to prevent interstage feed-
`back coupling through the common impedance of
`the line.
`decoupling network One or more decoupling fil-
`ters.
`decoupling resistor The resistive member of a re-
`sistance-capacitance (RC) decoupling filter.
`decoy In radar, an object that provides misleading
`reflections. Also see CHAFF.
`decreasing function A function whose curve has a
`negative slope at all points in the domain.
`decrement 1. Also called logarithmic decrement.
`The rate at which a damped wave dies down. The
`decrement value is the natural (base-e) logarithm
`of the ratio of two successive peaks of the same
`polarity. 2. A quantity used to lessen the value of
`a variable. 3. To lower the value (of a register, for
`example) by a single increment.
`decremeter An instrument for measuring the de-
`crement of a radio wave.
`decremeter capacitor A variable capacitor for use
`in a decremeter. The rotor plates are shaped so
`that equal angular rotations correspond to the
`same decrement at all settings. Thus, the percent-
`age of capacitance change for a given angle of rota-
`tion is constant throughout the capacitance range.
`decryption The conversion of an encrypted signal
`from a cipher into plain text, graphics, or other
`commonly recognizable form. Also see CIPHER.
`Compare ENCRYPTION.
`decryption key An algorithm, or a set of algorithms,
`that converts an encrypted signal from a cipher
`into plain text, graphics, or other commonly rec-
`ognizable form. Each cipher has its own unique
`algorithm or set of algorithms for this purpose.
`The signal cannot be decrypted unless all the
`components of the key are present.
`dedicated Assigned exclusively to a certain pur-
`pose [e.g., a dedicated facsimile (fax) line].
`deductive logic A form of symbolic logic used to
`demonstrate that a certain conclusion will always
`follow, given a certain set of circumstances. The
`logic of digital circuits is deductive. Compare IN-
`DUCTIVE LOGIC.
`
`dee In a cyclotron, one of the D-shaped chambers
`in and between which particles accelerate in a
`spiral path to high velocity.
`dee line In a cyclotron, a support for the dee, with
`which it forms a resonant circuit.
`deemphasis In frequency modulation, the intro-
`duction of a low-pass characteristic (response
`falls as modulating frequency increases) to com-
`plement the rising response of preemphasis. Also
`called postemphasis or postequalization. Com-
`pare PREEMPHASIS.
`deemphasis amplifier An amplifier used to re-
`move the high-frequency preemphasis applied to
`signals prior to broadcasting, multiplexing, tape
`recording, or telemetering. Also see DEEMPHA-
`SIS and PREEMPHASIS.
`deemphasis circuit A low-pass filter that provides
`deemphasis in an FM receiver.
`deemphasis network See DEEMPHASIS CIRCUIT.
`deenergize To take a circuit or device out of opera-
`tion (i.e., to remove its power or signal excitation).
`deep cycle Pertaining to a rechargeable cell or bat-
`tery that can operate until it is almost completely
`discharged. It generally has a high ampere-hour
`capacity.
`deep-diffused junction A pn junction made by dif-
`fusing the impurity material deep in the semicon-
`ductor wafer. Compare SHALLOW-DIFFUSED
`JUNCTION.
`deep discharge The nearly complete discharge of a
`cell or battery; usually done prior to recharging.
`deep-space net A radar system intended for con-
`stant monitoring of spacecraft.
`defeating 1. The disabling or circumvention of an
`alarm or security system, leaving the protected
`property vulnerable to intrusion. 2. The danger-
`ous, and potentially lethal, disabling of a safety
`device in an electrical or electronic system.
`defect 1. Absence of an electron (hence, presence
`of a hole) in the lattice of a semiconductor crystal.
`2. An abnormality of design, construction, or per-
`formance of an electronic circuit or device. 3. In a
`computer system, a hardware or software fault
`that could be the eventual cause of a failure. 4. A
`flaw in a crystalline substance.
`defect conduction In a semiconductor material,
`conduction via holes.
`deferred addressing Indirect addressing in which
`a preset counter makes several references to find
`a desired address.
`deferred entry An entry into a computer subrou-
`tine, delayed because of a delay in the exit from a
`control program.
`deferred exit An exit from a computer subroutine,
`delayed because of a particular command.
`defibrillation Use of a CARDIAC STIMULATOR to
`halt fibrillation of the heart, as caused by electric
`shock.
`defibrillator See CARDIAC STIMULATOR.
`definite-purpose component A component de-
`signed for a specific use, rather than for a wide
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