Induced in an inductor in opposition to the

original voltage back-up /Ъазк лр/ n [9] substitute kept in

reserve for emergencies balance control /'baelans kan.traul/ [13]

control for adjusting the relative

amplification of the left and right channels

of a stereo signal balance wheel /'baslans wial/ [24] small

wheel which controls the timing in a

watch

band width /'baendwitO/ [21] difference between the lowest and highest frequency in a group of frequencies

bargraph /'ba:gra:f/ [6] electronic meter which shows the power level of a signal using columns of lights (usually LEDs)

base /beis/ n [9] electrode of a transistor which is used to control the flow of charge carriers between the collector and the emitter

base station /'beis .steijn/ [27]

transmitter and receiver which controls all

the mobile radio communications in a

particular area bass /beis/ [6] low frequency sounds battery/'baetari/ [1,5] combination of cells

for providing electrical energy battery charger /'baetari ,tja:d3a(r)/ [5]

device for recharging a battery-baud /ba:d/ [28] bits per second: measure of

the rate of transmission of digital signals beam /bi:m/ [6, 8] narrow, straight path for

electrons or radio waves bias /'baias/ [5] apply a DC voltage to a

component (e.g. a transistor) to control its

operating point binary /'baman/ [3, 15] counting system

using only two digits, 0 and 1 binary digit /'baman ,did3it/ [15] one

character in a binary system, either 0 or 1 bipolar transistor /.baipaula

tram'zista(r)/ [23] transistor containing

two PN junctions forming either an NPN

or a PNP type of transistor

bistable /.bai'staibl/ [24] electronic circuit which can be switched between two stable states

bit /bit/ [15] binary digit

blank /blaerjk/ v [20] make a video signal

blacker than black blank /blaerjk/ ad] [24] not showing

anything block /blDk/ [1 ] see stage block diagram /,blok 'daiagraem/ [1]

drawing showing the different electronic

stages which make up a circuit body scanner/'bDdi ,ska;n9(r)/ [29]

medical electronic device for building up a

Video image of the internal organs of a

patient

braid /breid/ [26, 28] conductor loosely

woven from metal threads bridge (circuit) /brid3 ('s3:kit)/ [18]

balanced circuit made from four

components bridge rectifier /,bnd3 'rektifai3(r)/ [5]

circuit made up of four diodes for

converting both the positive and negative

parts of an AC voltage to DC brightness /'braitnas/ [8, 19] strength of

light

brilliance /'brilians/ [19] see brightness

broadcasting /'bra:dka:stirj/ [29] transmitting radio or TV signals

broadcast quality /'bro:dka:st .kwolsti/ [22] of a high enough standard to be used for a professional radio or TV broadcast

buffer /Ъл1э(г)/ [8] electronic circuit for isolating two circuits from each other and matching the signals going between them

burglar alarm /Ъз;д1эг э,1а:т/ [13] system for detecting when someone tries to break into a building and steal something

burst /b3:st/ [27] sudden explosive pulse

bus /das/ [23] set of parallel conductors for carrying signals between the various internal parts of a computer system

button /Ълт/ [8] small push switch (usually round)

buzzer /Ългэ(г)/ [9] device which uses an electrical signal to produce a buzzing sound

С

cable /'keibl/ [26, 29] insulated wire or set of wires used for carrying electrical current or signals

cable television /keibl 'telivi^n/ [26] system which transmits video signals using cables

cabling /'keiblirj/ [27] insulated electrical wiring

CAD /ksed/ [2, 3] Computer Aided Design: technical drawing and design using a computer

cadmium /'kajdmiam/ [5] chemical

element (Cd) used in some batteries calculator/'kaelkju,leito(r)/ [8] electronic

device for doing mathematical calculations camcorder /'кагт,кэ^э(г)/ [21] portable

hand-held camera for recording and

playing video images capacitance /ka'pjesitans/ [5] ability to

store charge capacitor/ks'paesitafr)/ [1, 4] electronic

component which stores charge carrier wave /'кзгпэ weiv/ [ 1 ] radio wave

used to carry audio or video signals cathode /'kaeBaud/ [19] negative electrode

which emits electrons cathode ray oscilloscope /'kaeBsud rei

o.silaskaup/ [19] electronic instrument for

measuring and displaying changing

signals on a screen using a cathode ray

tube

cathode ray tube /'kaeSaud rei tju:b/ [19] large thermionic valve used to produce a display by firing a beam of electrons at a phosphor-coated screen. Used in oscilloscopes and television sets

CB radio /si: bi: 'reidiau/ [10] amateur mobile radio system

CCITT/,si: si: ai ti: 'ti:/ [28] Comite Consultatif International Telegraphique et Telephonique

CD /,si: 'di:/ [1, 16] compact disc

cell /sel/ 1 [5] component which changes a form of energy (usually chemical) energy into electrical energy 2 [27] subdivision of a communications area in a cellular phone network. Each cell has its own base station and set of transmission frequencies

cellphone/'selfaun/ [15, 27] see cellular phone

cellular phone /.seljula 'faun/ [27] mobile telephone which communicates through base stations situated in areas called cells

central processing unit/.sentrel

'prausesTrj ju:nit/ [23] 1С chip at the centre

of a computer for controlling the system

and processing the data ceramic /вэ'гаггшк/ [4] material commonly

used as an insulator channel /'tjaensl/ v [6] guide into channels channel /'tjsenal/ n 1 [6] group of

frequencies used for communications