- •29 Word study Verbs and related nouns
- •34 Language study Describing a process
- •3 6 Writing Describing a process
- •Tuning-in
- •66 Writing 2 Ordering components
- •74 Tuning-in
- •81 Listening
- •82 Language study Would
- •In the future, electronics are likely to become even more common in the home as multimedia entertainment systems and computer-controlled robots are developed.
- •Rf carrier
- •Introduction to Electronic Systems
- •16 Weeks X 2 VI hours
- •When is the lunch break?
- •10 These tolerances may seem to reflect poor manufacture but in most circuits they are, in fact, quite satisfactory. Relaxing the tolerance enables the makerto sell them more cheaply.
- •X varactor diode
- •Identify each of the following diodes:
- •10 The first stage consists of a transformer which steps down the voltage of the ac mains (see Fig. 2).
- •Smoothed dc input
- •15 Common is reverb (reverberation) which can make the music sound as if it was recorded in a very large building or a very small room.
- •Making a recording Places People Equipment
- •4 How is mixing down like developing and printing a photograph?
- •In this text which are additional to those given on the tape.
- •3 You must always keep an eye on the recording level.
- •1 A photodiode picks up rays from the remote control.
- •Ir diode
- •2 How many detection devices does it show? Name them.
- •4 If a burglar walks in front of a motion sensor,
- •7 A magnet on the moving part trips a switch if
- •Sensing device Used to detect
- •9V battery
- •In a frequency-modulated (fm) wave, the audio signal is combined with the rf carrier wave to vary the frequency of the carrier (see Fig. 2).
- •Af power amplifier
- •Via di Pietra Papa 00146 Roma
- •25 Die away naturally. As it dies, the current in the object reactivates the search coil. This voltage is then amplified to indicate with a sound or a flashing light that an object has been found.
- •4 The magnetic field a voltage in the search coil.
- •5 Noise is also by the low-frequency mains supply.
- •In left
- •In right о г
- •Interviewer: a test engineer. What would that involve?
- •I Is there any other kind of work you! enjoy?
- •15 Instead of recording the sound waves continuously, a drum з
- •4 These are converted to electrical signals by (use) a microphone.
- •15 Vinyl records are eliminated such as 'crackle' caused by dust and static, and 'jumping', due to scratches on the recording surface.
- •8 What might be the effect of so many people having cd players?
- •1 Unlike lPs, cDs use a digital recording system.
- •7 The electron gun in a crt a stream of electrons.
- •20 With an oscilloscope so that a visual display of the waveform can be seen.
- •45 Electrons.
- •Video cassette recorder
- •Italics from the text below. One has been done for you.
- •Vhs video-recorder mechanism
- •15 The number of iCs used in a computer, I.E. The chip count, can be reduced by connecting nand gates together to form other types of gates (see Fig. 3).
- •Integration as shown in Table 1. The 1с shown in Fig. 2 is an ssi 20 device but microprocessors used in computers are vlsi or slsi devices.
- •Input impedance low high
- •Instead of using the complicated springs, cogs, and wheels of a mechanical watch, the digital watch uses a vibrating crystal to keep time. It is accurate to one second in 10 years.
- •Vibrating crystal
- •15 Each one-second pulse triggers the microchip to send signals to the digital display to advance the numerals by one second.
- •Xdiaphragm
- •65 System.
- •1 Engineers developed optical fibre cables in the 1980s.
- •2 What is the purpose of the dielectric material in coaxial cable?
- •Insulator (e.G. Polyethylene) sheath
- •Insulator (e.G. Polyethylene) covering wire
- •25 Microwaves can be guided along rectangular copper ducts by a series of reflections from the inner walls (see Fig. 4).
- •If you make a mistake when keying in a number and you want to delete the last digit:
- •If you hold down clr,the whole numberwill be deleted and the p3 will go back to standby.
- •3 What is the difference between a mobile phone and a cellphone?
- •20 Telephone calls at the same time. To achieve this, each
- •30 Compromise between the number of frequency channels available in each cell and the interference between communications in different cells.
- •40 Calls from other cellphones and fixed telephones throughout the whole telephone system (see Fig. 2).
- •50 Call, the 8kHz signal is discontinued and the speech channel is enabled.
- •8 The signal indicates a suitable frequency channel for the call.
- •5 Converts the binary data into digital information (lines 21-22)
- •International international
- •40 As ordering goods and controlling bank accounts.
- •1 Avionics
- •2 Computing
- •3 Defence
- •1991-Present
- •1990-1991 Summer 1989
- •1 A technician with experience in servicing hospital equipment.
- •4900 University Avenue
- •If you would like to hear about outstanding opportunities in Europe to work in the expanding area of personal communication systems, write to:
- •If you can fill one of these vacancies, contact us at once.
- •I'm interested. I have the following training/ experience:
- •If a target is hit. .
- •Input signal
- •1 Manufacturing
- •2 Planning
- •3 Installation
- •4 Commissioning
- •If a target is hit. .
- •5 Maintenance
- •6 Sales
- •8 Research and Development
- •30 Large companies run their own r&d departments. Exciting
- •Induced in an inductor in opposition to the
- •Video image of the internal organs of a
- •2 [13] One side (left or right) of a stereo
- •In one unit and sharing a common
- •Voltage produced by an electrical source
- •241 Solid cylinder of metal oxide insulating
- •Video picture flip-flop /'flip йар/ [24] digital electronic
- •Instrument used for detecting pulses and
- •1 Or 0, high or low) long wave /'log weiv/ [10] range of radio
- •Voltage ac electricity supply maintain /mem'tem/ [22, 29] keep in good
- •Integrated circuit on one piece of silicon microcomputer/,maikraukam'pju:ta(r)/
- •Instrument for measuring various electrical quantities including voltage, current and resistance
- •Inputs are high natural frequency /.Naetjaral 'fri:kwansi/
- •Voltage ionizes the neon gas inside network /'netw3:k/ [26] system of
- •Interconnected devices network manager /,netw3:k 'тгепк1зэ(г)/
- •Interconnected telephone lines for use by
- •In a public telephone network which
- •Voltage which causes a component to pass
- •Various signals used in the test and
- •Integration: between 104 and 10s active
- •Voltage level from varying stable /'steibl/ [24] in a balanced state stage /steid3/ [5] circuit block: section of
- •In a circuit suppress /sa'pres/ [18] prevent a signal
- •Iks,tjemd3/ [28] switching centre for
- •Video signal teletype terminal /'telitaip ,t3:minal/ [28]
- •Images over long distances television receiver Ле1шзп n,si:v9(r)/
- •Isolating an ac supply voltage transistor /traen'zistsir)/ [1]
- •28] Cable or duct for guiding signals
- •Variable capacitor or resistor for making
- •V/VI:/[4, 11] volt
- •Vacuum tube /'vaekjuim tju:b/ [1 ]
- •Vdu /VI: di: 'ju:/ [28] visual (or video)
- •Video screen vdu terminal /VI: di: 'ju: ,t3:min3l/ [28]
- •Video recorders
- •Video-conferencing
- •Voltmeter I
In one unit and sharing a common
amplifier
double-pole switch /dAbl 'рэо1 switjV [5] switch with two sets of contacts which can be used to connect and disconnect two circuits (or parts of a circuit) simultaneously
drive /draiv/ [22] wheel, controlled by an electric motor, which forces the tape rollers in a tape recorder to turn and move the magnetic tape
drum kit /'<клт kit/ [15] set of drums
drum machine /'йглт m9,Ji:n/ [15] electronic device for automatically producing drum sounds
duct /dAkt/ [26] hollow rectangular tube
E
earpiece /'iapi:s/ [26] part of a telephone
which contains a small loudspeaker and is
held against the user's ear earth /з:9/ n [1 ] common zero voltage point
in a circuit earth /з:6/ v [1] connect to a zero voltage
point
earth station /'з:в ,steijn/ [26] satellite communications transmitter/receiver base positioned on earth
electret microphone /i.lektret 'maikrafaun/ [26] capacitor microphone which contains a permanently charged insulating material known as electret
electricity /ilek'trisati/ [5] supply of electric current and voltage
electrode A'lektraud/ [5] positive or negative connector which collects or emits a charge
electrolyte /I'lektra.lait/ [5] chemical which aids the flow of current between electrodes
electrolytic capacitor A'lektro.litik k3'paesit3(r)/ [1, 5] capacitor which uses an electrolyte to give large values of capacitance. It must be connected with the correct polarity.
electromagnetic field /i.lektraomsg.netik 'fi:ld/ [12] area around a conductor in which electromagnetic force has an effect
electromagnetic induction A.lektraumasg.netik in'dAkjn/ [12] the production of a voltage caused by a changing electromagnetic field
electromagnetic wave /i.lektreumajg.netik 'weiv/ [10] travelling wave which displays electrical and magnetic properties
electromagnetism
/i.lektrau'majgnatizm/ [2] magnetism
caused by an electric current electron A'lektran/ [18,19] negatively
charged particle electron gun /i'Iektron длп/ [18,19] part
of a cathode ray tube which accelerates
electrons towards the display screen electron lens /i'Iektron lenz/ [19] part of a
cathode ray tube which focuses the
electrons into a narrow beam electronic /elek'tmnik/ adj [1] to do with
electrons
electronic mail /elektronik 'meil/ [28]
communications system which uses a
central computer and computer terminals
for the transmission of messages electronics /elek'troniks/ n [2,3] the
science and technology of electrons and
electronic devices electronic engineer/'elek.tronik
end3i'ni9(r) [29] person who is
professionally qualified in the study of
electronics electroplating /i.lektrau'pleitin/ [6,17]
process using electricity to cause a
chemical reaction which deposits a
metallic surface on an object electrostatic charge A'lektraustastik
'tj a:d3/ see static electrotechnology/i.lektrautek'nDladsi/
[2] the technology of electrical systems e-mail /'i: meil/ [28] electronic mail EMF /,i: em 'ef/ [5] electromotive force: