ĐIỆN tử VIỄN THÔNG nhóm 2 khotailieu
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NHÓM 2 – LỚP Đ8-ĐTVT 2
MEMBER:
-
Phạm Văn Thành
Phạm Thị Bích Lụa
Vũ Thị Ngát
Nguyễn Thị Minh Thu
Dương Thị Hồng
Hoàng Thị Hường .
Unit 1
Task 1 make a list of things in your house which use electronic
-
Fax
Computer
Television
Lamp
Printer
Task 2 Find out the meaning of these abbreviations
- IC : integrated circuit
- Hi- fi ( high –fidelity ) : high quality sound reproduction which is true
to thr orginal sound
- CD: Compact disc
Task 3
-
Washing Machine
Television
Radio
Microwave Oven
Water Heater
Record Players
Tape Recorders
Task 4
Date
Early 20 th century
1947
1958
Future
Invention
Vacuum tube
Transistor
IC
Applications in home
Radios , television
Portable radio
Automatic washing
machine
Multimedia
entertainment system ,
computer controlled
robot
Task 5 List of way in which you think electronics maybe used in the
home in the future
- In the future , there’ll have a robot do all the chore
- In the future , there’ll have an infinity power source like electric
- In the future , there’ll have an 5D printer
Task 6
1. Circuit diagram and block diagram
2. Systems approach to electronics
Task 7
There are 11 symbols in fig 2 . there are :
-
Fixed resistor
Capacitor
Aerial
Earth
Lound speakers
Diode
Bipolar transistor PNP and NPN
Ap amp
Fixed capacitor
Electrolytic capacitor
Variable capacitor
Describe the value of the components :
-
R2: a one kilohm resistor
R3: a forty seven kilohm resistor
C1: a five to sixty five picofarad variable capacitor
C2:a hundred pico farad capacitor
C3:a ten micro farad electrolytic capacitor
P1: a five kilohm potentiometer
L1:a four hundred and seventy micro henries inductor
Task 8 Describe the value of these component
-
R2: a one kilohm resistor
C1: a five to sixty five picofarad variable capacitor
R3: a forty seven kilohm resistor
C3:a ten micro farad electrolytic capacitor
P1: a five kilohm potentiometer
- L1:a four hundred and seventy micro henries inductor
Task 9
1.
2.
3.
4.
5.
6.
7.
8.
Consists
Microhenry
Variable
Variable capacitor
Picofarads
Connected
Diode
Supply
Task 10 : Work in pairs
Task 11 :
1.
2.
3.
4.
5.
6.
7.
8.
Is composed of
modulator
Oscillator
Carrier
Amplifier
Signal
Power
Aerial
Answer Question
1. The diagram of an amplitude-modulated (AM ) radio transmitter
2. It is composed of an RF oscillator , a modulator , an Rf power
amplifiler , an AF amplifier
3. The RF oscillator is connected to modulator , the AF amplifier I linked
to modulator , the modulator is connected to RF power amplifier , the
microphone is linked to AF amplifier , and Rf power amplifier is
connected to aerial
4. The RF oscillator generates an RF carrier wave . The microphone
converts sounds into audio frequency signals . AF amplifier is amplifi
audio frequency signals . Modulator uses the amplifier AF signal to
modulate the RF carrier wave . Rf power amplifiler increase the power
of the modulated carrier wave
