McGRAW-HILL
`ELECTRONICS
`DICTIONARY
`
`FIFTH EDITION
`
`JOHN MARKUS
`NEIL SCLATER
`
`McGraw-Hill, Inc.
`New York San Francisco Washington, D.C. Auckland Bogota
`Caracas Usbon London Madrid Mexico City Milan
`Montreat New Delhi San Juan Singapore
`Sydney Tokyo Toronto
`
`BNA/Brose Exhibit 1058
`IPR2014-00417
`Page 1
`
`

`

`Library of Congress Cataloging-in-Publication Data
`
`Markus, John, 1911-1982
`McGraw-Hill electronics dictionary I John Markus, Neil Sclater. -
`5th ed., international ed.
`p.
`em.
`Rev. ed. of: Electronics dictionary. 3rd ed. 1978.
`ISBN 0-07-040434-8
`II. Markus,
`I. Sclater, Neil.
`1. Electronics-Dictionaries.
`John, 1911-1982 Electronics dictionary.
`III. Title.
`TK7804.M354 1994
`621.38'03-dc20
`
`93-39212
`CIP
`
`Copyright © 1994, 1978, 1945 by McGraw-Hill, 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 pub(cid:173)
`lisher. Copyright © 1966, 1960 under the title Electronics and Nucleonics
`Dictionary. All rights reserved.
`
`2 3 4 5 6 7 8 9 0 DOC/DOC 9 9 8 7 6 5
`
`ISBN 0-07-040434-8
`
`The spoiiSoring editor for this book was Steve Chapman, the editing
`supervisor was Frank Kotowski, Jr. and the production supervisor was
`Suzanne W Babeuf It was set in Times roman by North Market Street
`Graphics.
`
`Primed and bound by R. R. Donne/ley & Sons Company.
`
`INTERNATIONAL EDITION
`
`Copyright© 1994. Exclusive rights by McGraw-Hill, Inc. for
`manufacture and export. This book cannot be re-exported from the
`country to which it is consigned by McGraw-Hill. The International
`Edition is not available in North America.
`When ordering this title, use ISBN 0-07-113486-7.
`
`Infonnation contained in this work has been obtained by McGraw-Hill, Inc.
`from sources believed to be reliable. However, neither McGraw-Hill nor its
`authors guarantee the accuracy or completeness of any information pub(cid:173)
`lished herein and neither McGraw-Hill nor its authors shall be responsible
`for any errors, omissions, or damages arising out of use of this information.
`This work is published with the understanding that McGraw-Hill and its
`authors are supplying information but are not attempting to render engi(cid:173)
`neering or other professional services. If such services are required, the
`assistance of an appropriate professional should be sought.
`
`BNA/Brose Exhibit 1058
`IPR2014-00417
`Page 2
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`

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`¥ I
`
`i
`
`Jresence of
`ications the
`ift-free AC
`lted in syn(cid:173)
`·ersions for
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`ference fre(cid:173)
`titive signal
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`ignal.
`to track its
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`ed position
`can be re(cid:173)
`ulse) or by
`!d until the
`tg relay the
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`component
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`:r circuit.
`ion station
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`tings, halts,
`logarithm.
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`, called the
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`·e, the loga(cid:173)
`JO. Another
`and known
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`ions.
`:>f the ratio
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`. forces are
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`•ltage over
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`tic conver-
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`ch variable
`"he outputs
`al function
`he product
`
`logarithmic scale A scale whose graduations are spaced
`logarithmically rather than linearly.
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`Logarithmic scale gives constant percentage accuracy of readings
`for all pointer positions.
`
`logger A recorder that automatically scans measured
`quantities at specified times and records or logs their val(cid:173)
`ues on a chart.
`'The translation of formal logic into functional elec(cid:173)
`logic
`tronic circuits that can be represented by a system of sym(cid:173)
`bols (e.g., AND, OR, and NOT). The functions are
`performed by switching circuits or gates with only two
`states- ON or OFF or OPEN or CLOSED-making it
`possible to use binary numbers in solving problems. Each
`logic symbol can be represented as a truth table that gives
`the output for all possible input conditions. Gate circuits
`are the basis for digital computers.
`logic anolysis Determination of the sequence of logic
`steps required during a computer run to produce the
`desired output files from the input files.
`logic analyzer An analyzer that locates trouble in digital
`systems by displaying digita.l signal levels simultaneously
`for a number of locations at a predetermined instant of
`time, which is usually determined by counting clock ticks.
`The logic analyzer can generate a trigger that stops data
`collection at the desired instant and displays the pulse sig(cid:173)
`nals on a cathode-ray tube screen for analysis of circuit or
`program errors, isolation of glitch sources, detection of
`illegal states, mapping of data flow, and diagnosis of other
`computer problems.
`·
`logic comparison The operation of comparing two items
`in a computer and producing a 1 output if they arc equal
`or alike and a 0 output if they are not alike.
`logic design The design of the complete system of logic
`clements required for a specific application in a digital
`computer or other digital system.
`logic diagram A diagram that represents the logic ele(cid:173)
`ments of a computer and their interconnections without
`necessarily showing construction or engineering details.
`logic element The smallest building block that can be rep(cid:173)
`resented by an operator in an appropriate system of sym(cid:173)
`bolic logic for a computer data-processing system. Typical
`logic elements are the AND gate and the flip-flop.
`logic function A means of expressing a defin ite state or
`condition in magnetic amplifier, relay, and computer cir(cid:173)
`cuits. Examples include: (a) the AND function, where an
`output is produced only when the correct number of input
`signals is present and combined; (b) the OR function,
`where an output is obtained when any one of a number of
`input signals is applied; (c) the NOT function, where the
`output obtained is the inverse of the input signal.
`logic level One of the two voltages whose values have
`been arbitrarily chosen to represent the binary numbers 1
`and 0 in a particular digital system. The magnitude and
`polarity of the voltage levels must be specified for a par-
`
`loktal tube
`
`ticular application to avoid confusion because the level
`used (or 1 can be either higher or lower than that for 0.
`Terms such as positive logic, negative logic, normal logic,
`and inverse logic arc ambiguous because they can be con(cid:173)
`strued differently for NPN than for PNP devices.
`logic operation A nonarithmetic operation in a computer,
`such as comparing, selecting, making references, matching,
`sorting, and merging, where yes/no decisions are involved.
`logic sum A computer addition in which the result is 1
`when either one or both input variables is a 1, and the
`result is 0 when the input variables are both 0.
`logic swing The voltage difference between the logic levels
`used for 1 and 0. The magnitude of the swing is chosen arbi(cid:173)
`trarily for a particular system and is usually well under 10 V.
`logic switch A diode matrix or other switching arrange(cid:173)
`ment that is capable of directing an input signal to one of
`several outputs.
`logic symbol A graphic symbol that represents the means
`for performing some specified simple computer operation,
`such as NOT, AND, OR, NAND, and NOR.
`log-periodic antenna A broadband antenna in which the
`electrical lengths and element spacings are chosen so the
`bidirectional radiation pattern, impedance, and other
`properties of the antenna are repeated at a number of
`other frequencies that arc equally spaced when plotted on
`a logarithmic scale.
`log-periodic dipole attay A broadband antenna array
`whose dipole lengths and spacings increase with distance
`from a source, with the transmission lines being transposed
`between adjacent dipole elements. The radiation pattern is
`unidirectional in the backfire direction, toward the source.
`
`Log-periodic dipole array.
`
`log-periodic folded-dipole array A unidirectional broad(cid:173)
`band antenna whose clements are arranged as in a log(cid:173)
`periodic dipole array, but with all the folded dipoles
`connected in series with the transmission line rather than
`in shunt. A phasing strip in each folded dipole is adjusted
`experimentally to produce a good backfire beam.
`log-periodic folded-monopole array A unidirectional
`broadband array that is essentially half of a log-periodic
`folded-dipole array, fed against a ground plane.
`log-periodic folded-slot array A unidirectional broad(cid:173)
`band antenna that consists of a single metal sheet from
`which slots arc cut in the pattern of a log-periodic folded(cid:173)
`dipole array.
`loktal base A tube base that has a grooved center post
`which locks firmly in a correspo11ding eight-pin loktal
`socket. The tube pins are sealed directly into the glass
`envelope. It is also called a !octal base.
`loktal tu be An electron tube that has a loktal base.
`
`BNA/Brose Exhibit 1058
`IPR2014-00417
`Page 3
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