Tiếng Anh chuyên ngành Điện tử Viễn thông là tài liệu giảng dạy bởi giảng viên trường ĐH Điện Lực , được biên soạn bởi các thầy cô trong trường, là tài liệu Tiếng Anh tham khảo quý giá đối với các bạn sinh viên ngành Điện tử Viễn thông.ập bài giảng cung cấp các khái niệm, các vấn đề và cách sử dụng các thuật ngữ chuyên ngành viễn thông, tạo điều kiện cho sinh viên luyện những cấu trúc ngữ pháp. Phần thực hành ngôn ngữ gồm nhiều loại hình bài tập phù hợp giúp sinh viên dễ dàng hơn trong việc sử dụng các kiến thức viễn thông, các thuật ngữ đã tích luỹ được. Sau học phần tiếng Anh chuyên ngành điện tử viễn thông, sinh viên có khả năng đọc, dịch, viết, phân tích các tài liệu có liên quan đến chuyên ngành. Sinh viên có được phương pháp nghiên cứu tài liệu chuyên môn bằng tiếng Anh nhằm phục vụ tốt cho các môn chuyên ngành trong khi học tại Học viện cũng như tự nghiên cứu trong công việc hay nâng cao trình độ sau này.
Trang 1Unit 1:electronics in the home
Task 6: các khối của radio.
Tên biểu đồ: block diagram of radio
The tuner select the required signal
The detector then separates( tách) off the signal
The AF (amplifier it )
Volume control
Power amp
Speaker
Task 7 : language nói về cấu tạo và thành phần 1 linh kiện
The radio / consists ,is conposed of / a tuner,a detector , and an AF amp
A tuner , a detector and an AF amp / comprise / the radio
The tuner /is connected to , is liked to / the detector
120 kΩ: a two hundred and twenty kilohm resistor
100 kΩ: a one hundred picofarad capacitor
20 mH: a twenty milihenries inducor.
Task 11:chức năng các khối
What is the funtion of the each block ?
The RF os cillator generates and RF carrier wase Which is fed into the modulator ?
The microphone converts sounds into audio frequency signals Signals which are amplified by the AF amplifoer
The modulator then user the amplified AF singnal
To modulator the RF carrier wase
The power of the modulated Carrier wase is increased by the RF power amplifier
The strong modutated out put signal are fed to the arrial which enable them to be tramsmited over long distances
Trang 2Unit 5:batteries
Task 5 : language( cách gọi tên 1 thiết bị và mô tả chức năng )
What is it called ?
What does it do ?
1 It is called a zince – cabon cell
2 It is know as a nicad cell
3 Acell provides electricty
4 Cells change chemical enery into electricty
Task 6: một số linh kiện cơ bản phải nêu theo cấu trúc It’s called… .it is known as
Vd: it’s called a capacial It varies capacitance in a ciruit
Task 8: cách thêm danh từ và động từ về pin
Task 10: chức năng của 1 số thiết bị
1 Transformer step down the AC main voltage
2 Double pole swith swithchers the charger on and off
3 Neon lamp shows when the charger is on
4 Fuse protecs the transfomer
5 Rectifier converts the AC voltage to a DC voltage
6 Aluminium heatsick keeps the diodes form overheating
7 Smoothing circuit remores the fluctuations in the DC output of the rectifier
8 Stabilizing circuit prevents the output from changing when the load varies
Unit 6 :
Task6:quá trình làm đĩa
Trang 3Firstly a blank perspex disc is grinded and polished to optical flatness (danh bong quang hoc) Next, it is washed
and spin –dried( rua va quay kho) It is then coated (ma)with a thin layer of photoresist (cam quang) and cured
in an oven( say kho) After that, as the disc is revolved(xoay dia), a laser beam is used to mark(danh dau) the
audio information pattern(mo hinh) on its surface This process is known as cutting the disc The photoresist is then developed and etched (khac lo)to produce pits in the disc’s surface These pits represent( bieu thi) the digital audio pattern.
The disc is then given( dua ra) a thin silver coat(ma) to make it electrically conductive(lop dan dien)
Next,electroplating(ma dien) is used to make a series of positive and negative copies of the master disc The final negative copy is used to made a large number of identical CDs The surface of the CD containing the pit
marks is then coated with a 10mm layer of aluminium followed by a protective layer of plastic After punching (duc lo)the centre hole, a label is applied (ung dung) and the CD is packaged( dong goi).
Cac buoc làm đĩa: Grind blank( mai foi) wash & spin dry( rua say kho) resist coat( tao lop ao) oven cure (phoi
kho) Laser cutting( cat laze) develop and etch pits( duc lo) silver coat( trang bac) elecoplate to make nickel father,mother,sons(ma nikel) press disc with son ( nen xuong) aluminium coat( ma nhom) protective plastic layer ( boc nhua bve ) punch centre hole (khoan lo) apply label (dong nhan) box.
Unit 9:alarm system
Task3: 4 thiết bị báo động
Magnectic switches
These are used on windowns and doors A magnet mounted on the moving part of the window or door trips a switch mounted on the frame when the window or door is opened.
Break detectors.
These are fitted on the inside surface of glass in windows and doors Some use a thin metal foil which is glued
around the edge of the glass: if the glass is broken the foil breaks too Others are are vibration sensors and
respond to the shock of the glass being broken.
Pressure mats
These are fitted under the carpet-at the bottom of the stairs, for example.The pressure of someone stepping on them causes two thin metal plates inside to come in contact, setting off the alarm.Beacause they’s constantly being walked on, pressure mats can get tired quite quickly and should be regularly tested and replaced if
necessary.
Motion sensors
These may use passive infra-red ultransonic, or microwave energy to detect movement within their range.
1 door switch
2 window foil
3 pressure mat
4 passive infra-red detector
Trang 4Task 5:in a simple alarm circuit what is the consequence of each action bellow?
1.a burglar disconnects the supply ,the alarm continues to operate on batteries
2.the glass is broken,the foil breaks too
3.a door is opened,a magnet on the door trips a switch on the frame
5.you are not there to reset the system ,the alarm stops after a set time
6.a burglar tries to force the alarm open,tamper sensors trigger the alarm
7.someone steps on them,two thin metal plates come in contact.
Task8 nối câu( 11 từ ghép).
Integrated(Integrated) – circuit; circuit- diagram ; alternating-current ; primary-cell ; zener-diode ; remote-control ; reed-switch ; surface-wave ; vibration(rung động )-sensor; reverse(đảo ngược )-bias ;
main-supply(cung cấp)
Unit 10:radio
Task 1 : các loại sóng theo tần số và bước sóng
High frequency- short wavelength : gammar rays,X-rays,ultraviolet rays
Low frequency- long wavelength: infra-red rays,radio waves
Task 2: radio wave from a transmiting aerial can travel in one or more of three different ways (sự khác nhau
Surface wave or ground wave
of the earth’s surface
sky wave space wave
Travel Can travel thousand of km Giving line of sight transmission
difficulties Varies with the season Obstacles such as hill,buidings,or
trees
Task 5: language
1.ground wave pass over sand 2.ground waves lose energy
Trang 5When ground waves pass over sand,they lose energy.
When passing over sand,ground wave lose energy
On passing over sand,ground wave lose energy
Vd: - when the switch close,current flows through the primary of the transformer
- on striking a plane,the radar signal is reflected
- when remoting control button is pressed,the television set changes channel
Task 9: 4 loại sóng cần nhớ
AF (audio frequency wave) tần số thấp,chứa thông tin cần truyền
RF: (radio frequency wave) là sóng để vận chuyển thông tin
AM: (gives an amlitude modulated carrier wave) biên độ thay đổi, f= const
FM: frequency-modulated wave : f thay đổi , điều chế để truyền đi
Task 11: chức năng của mỗi khối trong radio
1.aerial receives weak RF signals
2.RF tuner selects the required RF wave from those picked up by the aerial
3.RF amplifier amplifies the selected RF wave
4.detector separates the audio modulation from the RF carrier wave
5.AF ampifier amplifies the audio signal to make is strong enough to drive the loudspeaker 6.loudspeaker converts the audio signal into sound
Unit 15: drum machine
Task 2: qua trinh tao tin hieu khi danh trong
1,when then drum pad is pressed,the stored information is decoded and produces an electronic signal 2,the signal is sliced into many’samples’,each one a snapshot of the strength of the signal at one particular moment.this information is converted into binary code and then stored in the machine’s memory
3,when the drum is hit,it produces sound waves
4,the signal is turned into sound waves through an amplifier,and the drum sound is heard
5,the sound waves reach the microphone and are converted into an electrical signal
Task 5:language ( them –ing which vs for use)
1,with a drum machine,you can play any drum sound by pressing the right button
Trang 62,you can create drum music without playing a drum
3,what we hear as sound are changing in air pressure
4,these are converted to electrical signals by using a microphone
5,the information contained in the drum machine memory consists of samples of these eletrical signals 6,a drum machine contains record of sound taken at measured intervals
7,this process is called sampling
8,the functions of a drum machine include paning and tuning
9,panning means the positing of the drum sound in stereo
Task 6:language (danh từ ghép sử dụng which và for use)
Vd: a silicon diode = adiode which contains silicon
a smoke alarm= an alarm which warns of smoke
a car radio = a radio for use in a car
1,a burglar alarm =a larm which warns burglar
2, a clock timer = a timer for use in a clock
3,a mercury switch = a switch which uses the movement of mercury
4,a car phone = a phone for use in a car
5, a germanium diode = a diode which contains germanium
6,a ground wave = a radio wave which travels along the surface of the earth
7,a block diagram= a drawing showing the different electronic stages which make up a circuit 8,an assembly line = a production area of a factory where the parts of a product are put together in a series of stages
9,a fuseholder = a device worn on the head which covers each ear with a small loudspeaker
10,a wavemeter = an electric instrument for measuring the frequency of a transmitter singal
11,a cell phone = a cellular phone
12,head phones = a device worn on the head which covers each ear with a small loudspeaker
13,an ammeter = an electronic instrument for measuring current
14,a handset = an electronic device which can be held in one hand
Task 7: quá trình lấy mẫu của tín hiệu.
Trang 71.is a sine wave an example of an analogue wave of a digital wave?
Show an analogue signal in the shape(hinh dang) of a sine wave.
2 how many voltage levels does a digital signal have?
The magnittude of a digital signal has only 2 levels high and low,which can by the binary digits 1 and 0
repecyively( tuong ung)
3.what is an ADC?
The analogue signals produced by transducers can be changed into digital signal using an analogue- to- digital converter (ADC)
4.how frequently must an analogue signal be sampled when it is coverting it to a digital signal?
The higher the frequency of the analogue signal,the more often it must be sample
5.what term means a binary digit?
Each binary digit used to show a binary value is known as a bit.
6.what effect do rounding errors have on a signal when it is converted back to an analogue form?
These rounding errors will cause the analogue signal to suffer some distortion( biến dạng).
unit 16: Audio recording systems.
Task 1: what do these abbreviations(viết tắt) mean?
LP: long playing record
CD:compact disc
Task 3:phân biệt đĩa LPs vs CDs
Sound quality Poorer than the original
Durability ( độ bền ) Easily damaged (vỡ ) Hardly damaged,high durability
Task 4: Language nguyên nhân và kết quả
Dust on records+ /cause/leads to/results in/is the cause of/ crackle
Trang 8Crackle+/ is caused by/ results from/ is the effect of/ is due to/ dust on records
1,distortion( biến dạng ) to high a recording level
2,noise generated within components poor recordings
3,overheating(nóng quá) a transistor is damage( thiệt hại)
4,dirty(bụi) heads scratches( xước) on records
5,a build up of oxide on the head is the tape rubbing against the head
6,jumping is hiss
7,unwanted signals interference(can thiệp) on radios
Unit 18:graphs
8Task 1: một số tính động từ miêu tả vẽ bản đồ
sales of sigles …… rose or decrease
Slightly(hơi)
Gradual( dần dần)
Steady ( ổn định)
Steep ( dốc)
Sharp (mạnh)
Sudden ( đột ngột)
Fast (nhanh)
Task 2: 4 mẫu câu mô tả sự tăng giảm
1 cassettes 1983-1986 sales of cassettes rose fast
2 cassetes 1989-1990 there was a slight rise in the sales of cassetes.
3 LPs 1983_1988 Sales of LPs slight decrease (giảm nhẹ )
4 CDs 1984-1985 there was a rise in the sales of CDs
Task 3: But/while
1 CDs and LPs 1986-1988 sales of LPd slight,but/while sales of CDs sudden rose.
2 Singles and CDs 1983-1984 As sales of singles rose,sales of CDs slight rose
Task 5: điền từ
1,computers process data
2,you can record sound on tape or disc
Trang 93,a bridge circuit is used to rectify alternating current to produce direct current
4,all metals,and some non metals such as carbon,conduct electricity
5,to prevent( ngăn chặn) radio interference ,you must suppress( ngăn chặn) any sources of interference such as car ignition systems
6,power transistors dissipate heat.therefore they must be mounted( gắn kết) on a heatsink
7,the electron gun in a CRT emit a stream of electrons.
8.when recording a CD,sound is sample 44100 times every second
Unit 19: test and repair intrucments
Task 4:chức năng của 4 thiết bị
1, to check a fuse =>>>>> ommeter
2,to determine (xác định ) the frequency response of an audio amplifier =>>>>> function generator 3,to test for the presence (hiện diện) of a control signal on the output pin of a computer chip =>>> logic probe ( thăm dò)
4,to determine the value of the current through a transformer =>>>>>> multimeter
5,to measure the frequency of an oscillator =>>>>> oscilloscope
Task 5: miêu tả CRT
a CRT is really a large vacuum tube valves it has three main sections The first section is an electron gun section which emits a stream of electrons The electron gun contains an electron lens which cause the electrons into a narrow electron beam
the second section is a deflection system, which allows the beam to be moved vertical of horizontally
Oscilloscopes use charged metal plates to give electron deflection,whereas television sets use electromagnetic coil
to give electromagnetic fields
The last section is a screen with a phosphor
coating The electron beam hits the screen, making the phosphor glow and causing a spots to be displayed the colour of the spot depends on the type of phosphor used.
Language Nguyen nhan ket qua
1 The electron beam hits the screen 2 The phosphor glows
=>>>>> The electron beam hits the screen causing the phosphor glows.
=>>>>> The electron beam hits the screen making the phosphor glows.
Unit 20 :High definition television
Task 2:
Trang 10Feature (tính năng) Existing (hien tai) High definition