The
`Illustrated Dictionary
`of Electronics
`
`I
`
`Seventh Edition
`
`Stan Gibilisco
`Editor-in-Chief .
`
`‘
`LIBRARY
`VT TECHNICAL COLLEGE
`RANDOLPH CTR VT 05061
`
`McGraw-Hill
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`PAICE 2030
`BMW v. Paice
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`BMW v. Paice
`IPR2020-01299
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`Library of Congress Cataloging-in-Publication Data
`
`Gibilisco, Stan.
`The fllustrated dictionary of electronics / Stan Gibilisco.—7th
`ed.
`
`cm.
`p.
`ISBN 0-07~024186-4 (pbk.)
`1. Electronics—Dictionaries.
`TK7804.G497 1997
`
`621.381'03—dc21
`
`I. Title.
`
`97-9031
`CIP
`
`McGraw-Hill
`
`3:2
`
`A Division of TheMcGrawHill Companies
`
`Copyright © 1997 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.
`
`1234567890 FGR/FGR 90210987
`
`ISBN 0-07-024186-4
`
`The sponsoring editor for this book was Scott Grillo, and the production supervisor
`was Pamela Pelton. It was set in Bookman by Lisa Mellott through the services of
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`(“McGraw—Hill”) from sources
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`authors guarantees the accuracy or completeness of any informa-
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`shall be responsible for any errors, omissions, or damages aris-
`mg out of use of this information. This work is published with
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`2
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`s stems. It was once common] used
`
`recrggfigl Kalephone-switching appucauollrls
`1:11 up 1. To replace faulty or damaged parts in
`Patan electronic system With roughly appropriate
`surrogates to restore operation quickly [usually
`under emergency conditions). Also see DOC-
`TOR. 2. To wire a circuit quickly using patch
`cords for preliminary test and evaluation.
`tent 1. A document awarded by a government
`”body. giving to an inventor the exclusive right
`to exploit an invention for a specified number
`of years. Formally called letters patent. 2. The
`monopoly granted by a document, as defined
`1.
`it: 1. The route over which current flows. 2. In
`Paradio and navigation. the imaginary line extend-
`mg directly between transmitter and receiver (or
`target)- 3. In a computer program, the logical or-
`der of instructions.
`thometer A form of lie detector that indicates
`changes in the electrical resistance of the hu-
`man body.
`pattern 1. An established sequence of steps in a
`process. 2. An arrangement of terms in a ma-
`trix. 3. The graphical representation of a varying
`quantity [e.g., an altemating-current wave pat—
`tern). 4. The image on the screen of an oscillo-
`scope, or the record traced by an oscillograph.
`5. The graphic polar representation of the radi-
`ation field of an antenna. 6. The arrangement of
`bits in a word or field.
`
`pattern recognition In machine-vision systems,
`a method of identifying an object or decoding
`data according to geometric shape. Optical
`character recognition (OCR) is an example. The
`machine recognizes combinations of shapes.
`and deduces their meanings via a computer
`program.
`pause editing In the editing of audio tape record-
`hlgs. the use of a “pause" switch to temporarily
`S 0P the tape when necessary.
`PAV Abbreviation of PHASE-ANGLE VOLTMETER.
`PM!
`In a mechanical stepping device, as in a
`nonelectric clock, a device made to engage the
`gapinghlsprockets on a wheel to ensure shaft ro-
`on
`one direction only.
`PfigHfigglgviation of PRIVATE AUTOMATIC EX-
`payiper'“ew Abbreviation, PPV. Television ser-
`EEELHHWhich each subscriber pays only for indi-
`se
`gaby TV See gflggchllg’rFIOnlsw.
`P baiiémbol for LEAD.
`225 togglgfiggrequency band extending from
`m§HAA£gremtion of PRIVATE BRANCH EX-
`PO 1- A1313
`UTER 2
`Abbrevia eviation of PERSONAL COMP
`-
`-
`tiOn ofP tion of PRINTED CIRCUIT. 3. Abbrevia-
`COL
`HOTOCELL. 4. Abbreviation of POSITIVE
`UMN- 5 Abbreviation of POINT-CONTACT.
`
`patch panel - PDM-FM 509
`
`o. Abbreviation of PERCENT (also. pct). 7- Ab-
`breviation of PROGRAM COUNTER.
`pc 1. Abbreviation of PICOCOULOMB. Also. pC
`(preferred). 2. Abbreviation of PICOCURIE. Also.
`pCi (preferred). 3. Abbreviation of PARSEC.
`pC Abbreviation for PICOCOULOMB.
`PCB Abbreviation of PRINTED-CIRCUIT BOARD.
`PC board See PRINTED-CIRCUIT BOARD.
`PC diode See POINT-CONTACT DIODE.
`p-channel
`JFET See P-CHANNEL JUNCTION
`FIELD-EFFECT TRANSISTOR.
`
`p-channel junction field-effect transistor Ab-
`breviation, PFET. A junction-type FET in which
`the gate junction has been formed on a bar or
`die of p-type semiconductor material. Compare
`N-CHANNEL JUNCTION FIELD-EFFECT TRAN-
`SISTOR.
`-
`
`p-channel MOSFET A metal-oxide semiconductor
`field-effect transistor in which the channel is
`composed of p-type silicon. Also see DEPLETION—
`TYPE MOSFET, DEPLETION.-ENI-IANCEMENT-
`TYPE MOSFET.
`and ENHANCEMENT-TYPE
`MOSFET.
`
`pCi Symbol for PICOCURIE.
`PCL Abbreviation of PRINTED-CIRCUIT LAMP.
`PCM Abbreviation of PULSE-CODE MODULA-
`TION.
`
`POM-FM Pertaining to a carrier that is frequency
`modulated by information that is pulse-code
`modulated. Also see FREQUENCY MODULA-
`TION and PULSE-CODE MODULATION.
`
`PCM-FM-FM Pertaining to a carrier that is fre-
`quency modulated by one or more subcarriers
`that are frequency modulated by information
`that is pulse-code modulated. Also see FRE-
`QUENCY MODULATION and PULSE-CODE
`MODULATION.
`
`In a pulse-code-modulated signal. one
`PCM level
`of several different possible signal conditions.
`POM-PM Pulse-code modulation that is accom-
`
`plished by varying the phase of the carrier wave.
`,
`PC relay See PRINTED-CIRCUIT RELAY.
`PC transistor See POINT-CONTACT TRANSIS-
`TOR.
`PD 1. Abbreviation of PLATE DISSIPATION. 2.
`Abbreviation of PULSE DURATION. 3. Abbrevia-
`tion of PROXIMITY DETECTOR. 4. Abbreviation
`of POTENTIAL DIFFERENCE.
`Pd Symbol for PALLADIUM.
`PDA Abbreviation of predicted drifi angle.
`PDAS Abbreviation of programmable data. acquisi-
`tion system
`.
`'
`'
`P display See PLAN POSITION INDICATOR.
`PDM Abbreviation of PULSE-DURATION MODU-
`LATION.
`‘
`is fre-
`PDM-FM Pertaining to a carrier that
`quency modulated by one or more subcarriers
`that are frequency modulated by pulses. that
`are pulse-duration modulated. Also see FRE-
`QUENCY MODULATION and PULSE-DURA-
`TION MODULATION.
`
`x
`
`3
`
`