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Slide 1 ANALOGUE AND DIGITAL ELECTRONICS ANALOGUE AND DIGITAL ELECTRONICS 1-Introduction to electronics. 1-Introduction to electronics. 3-Digital electronics.

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Presentation on theme: "Slide 1 ANALOGUE AND DIGITAL ELECTRONICS ANALOGUE AND DIGITAL ELECTRONICS 1-Introduction to electronics. 1-Introduction to electronics. 3-Digital electronics."— Presentation transcript:

1 Slide 1 ANALOGUE AND DIGITAL ELECTRONICS ANALOGUE AND DIGITAL ELECTRONICS 1-Introduction to electronics. 1-Introduction to electronics. 3-Digital electronics. 3-Digital electronics. 2-Analogue electronics. 2-Analogue electronics. Revision Assessment - Electricity and electronics. - Past, present and future. - From analogue to digital systems. - Resistors. - Capacitors. - Diodes. - Transistors. - Real circuits. - The binary numeral system. - Boolean logic. Logic gates. - Logic circuits. - Simulation work.

2 slide Slide 2 1. Do you know the names of these objects? 1.1- Electricity and electronics.

3 slide Slide 3 Light bulbMp3-playerHair dryerTelevision RadioComputer(Electric) fanDrill 1. Do you know the names of these objects?

4 slide Slide 4 __________ is the branch of science and __________ that deals with electrical circuits applied to information and signal processing. ____________ technology deals with the generation, distribution, switching, storage and conversion of electrical ___________. Electrical technology energy Electronics 2. Complete the definitions of electronic and electrical technology.

5 slide Slide 5 Electronics is the branch of science and technology that deals with electrical circuits applied to information and signal processing. Electrical technology deals with the generation, distribution, switching, storage and conversion of electrical energy. Electrical technology energy Electronics 2. Complete the definitions of electronic and electrical technology.

6 slide Slide 6 Is a light bulb an electronic or electrical device? I think it is an electric device because it converts electric energy. I think it is an electronic device because it processes information. Electrical Electronic 3. Classify the objects from the first activity as electrical or electronic.

7 slide Slide 7 Is a light bulb an electronic or electrical device? I think it is an electric device because it converts electric energy. I think it is an electronic device because it processes information. ElectricalLight bulb Hair dryer (Electric) fan Drill ElectronicMp3-player RadioComputer Television 3. Classify the objects from the first activity as electrical or electronic.

8 slide Slide 8 Vacuum tubes Transistors Integrated circuits A solid semiconductor device used to amplify and switch electronic signals. A miniaturized electronic circuit manufactured on a substrate of semiconductor material. A device used to amplify and switch electrical signals by controlling the movement of electrons in a low-pressure tube. 4. Match these pictures with their names and definitions Past, present and future of electronics.

9 slide Slide 9 Vacuum tubes Transistors Integrated circuits A solid semiconductor device used to amplify and switch electronic signals. A miniaturized electronic circuit manufactured on a substrate of semiconductor material. A device used to amplify and switch electrical signals by controlling the movement of electrons in a low-pressure tube. 4. Match these pictures with their names and definitions.

10 slide Slide 10 Electronics originated from electrical science at the beginning of the 20 th century. In 1883, Thomas Alva Edison discovered the thermionic effect. Electrons flow from one metal conductor to another through a vacuum. In 1904, T. A. Fleming built the first vacuum tubes. These devices can amplify electrical signals. The first applications of electron tubes were in radio communications. Vacuum tubes made weak audio signals from radio waves stronger. Radio broadcasting grew in the 1920s. Development of the television benefited from many improvements made to radar during World War II. Television became widely available in After the war, electron tubes were used to develop the first computers, but they were impractical because of the sizes of the electronic components. Summary of the history of electronics

11 slide Slide 11 In 1947, the transistor was invented by a team of engineers from Bell Laboratories. The transistor works like the vacuum tube, but it is smaller, consumes less power, is much more reliable, and is cheaper. Around 1960, the first integrated circuits were made. Integrated circuits are also called microchips, or IC. The typical IC consists of resistors, capacitors, and transistors packed on a single piece of silicon. Microcomputers, microwave ovens and mobile phones are examples of devices made possible by integrated circuits. In 1971, INTEL manufactured the first microprocessor with 2300 transistors. By 2009, the number of transistors in some microchips was more than 10 billion. At the moment, scientists are working on molecular electronics, optical and quantum computing. These and other emerging technologies will bring developments that we cannot imagine.

12 slide Slide 12 a) _ _ _ _ Invention of the vacuum tube. b) _ _ _ _ Invention of the transistor. c) _ _ _ _ First microchip. d) _ _ _ _ Start of radio broadcasting. e) _ _ _ _ Start of black and white television. f) _ _ _ _ First mobile phone in your family. 5. Find out what year these things happened by reading the text. Place them on the timeline a)

13 slide Slide 13 a) 1904 Invention of the vacuum tube. b) 1947 Invention of the transistor. c) 1960 First microchip. d) 1920 Start of radio broadcasting. e) 1947 Start of black and white television.. f) _ _ _ _ First mobile phone in your family a)b) e)c)d)f) 5. Find out what year these things happened by reading the text. Place them on the timeline.

14 slide Slide 14 DateInventionApplications Transistor Fill in the gaps with data from the text. The microprocessor was invented in Its applications are ….

15 slide Slide 15 DateInventionApplications 1904Vacuum tubesTo amplify electric signals 1947TransistorTo amplify electric signals 1960Integrated circuitMicrocomputers, mobile phones The microprocessor was invented in Its applications are …. 6. Fill in the gaps with data from the text.

16 slide Slide Look at these pictures and listen to the text. Video about e-waste from Greenpeace. U1a7.mp3

17 slide Slide 17 a)What is e-waste? E-waste is.... b)Where does most e-waste go? Most e-waste is exported to... c)Do you think e-waste is toxic? because electronic products contain heavy metals such as lead and mercury and hazardous chemicals. d)E-waste will be a bigger problem in the future because more and more people use more and more electronic devices and change them more often.Talk to your partner and try to find a solution to the e-waste problem. Governments should... We all should... Electronic products should Answer the questions below.

18 slide Slide 18 a)What is e-waste? E-waste is old electronic rubbish. b)Where does most e-waste go? Most e-waste is exported to poor countries in Asia and Africa. c)Do you think e-waste is toxic? I think it is toxic because electronic products contain heavy metals such as lead and mercury and hazardous chemicals. d)E-waste will be a bigger problem in the future because more and more people use more and more electronic devices and change them more often. Talk to your partner and try to find a solution to the e-waste problem. Governments should... We all should... Electronic products should Answer the questions below.

19 slide Slide 19 INPUT PROCESS OUTPUT The input part takes in energy of some form and produces an electrical signal. The process part modifies or does some calculations with the electrical signal. The output part produces a new energy output from the processed electrical signal From analogue to digital electronic systems. Any electronic device can be thought of as three linked parts – input, process, output. In electronics we use a block diagram to represent the parts of a tronic system.

20 Slide Label the objects by using the language bank below and identify the input and output block for each one. MEGAPHONE MICROPHONEELECTRONICSLOUDSPEAKER It converts sound to electrical signals. It processes electrical signals. It converts electrical signals to sound. Input Process Output ELECTRONICS It processes electrical signals.

21 slide Slide 21 ELECTRONICS It processes electrical signals. ELECTRONICS It processes electrical signals. 8. Label the objects by using the language bank below and identify the input and output block for each one.

22 Slide 22 MEGAPHONE MICROPHONEELECTRONICSLOUDSPEAKER It converts sound to electrical signals. It processes electrical signals It converts electrical signals to sound Input Process Output AERIALELECTRONICSLOUDSPEAKER Takes in electromagnetic waves and produces an electric al signal. It processes electrical signals It transforms electrical signals to sound RADIO 8. Label the objects by using the language bank below and identify the input and output block for each one.

23 slide Slide 23 TEMPERATURE SENSOR ELECTRONICS TEMPERATURE DISPLAY Senses changes in temperature and produces an electrical signal. It processes electrical signals. It gives a readout of temperature. DIGITAL THERMOMETER KEYPAD ELECTRONIC S DISPLAY SCREEN Push-buttons that generate electrical signals. It processes electrical signals. It converts electrical signals to visible numbers. CALCULATOR 8. Label the objects by using the language bank below and identify the input and output block for each one.

24 slide Slide 24 Electronic signals can be analogue or digital. An ANALOGUE signal continually changes and can have any value in a given range. A DIGITAL signal can only have certain, discrete values. DIGITAL BINARY signals are a subgroup of digital signals that can have only two states, ON (1) or OFF (0). There are no values in between.

25 slide Slide 25 The dashed signal is The continuous signal is The dotted signal is digital binary analogue digital because it has any value. because it has only two values because it has only certain values. time signal time signal 9. Label these signals as analogue, digital or digital binary. Match the sentences with arrows.

26 slide Slide 26 The dashed signal is The continuous signal is The dotted signal is digital binary analogue digital because it has any value. because it has only two values because it has only certain values. time signal time signal d. binary analogue digital 9. Label these signals as analogue, digital or digital binary. Match the sentences with arrows.

27 slide Slide 27 d_ _ _ _ ay th _ _ _ _ _ et_ _ s_ _ _ _ h What do you call object 1? Is it analogue or digital? Why? It is a.... I think it is because ) 2) 3) analogue digital binary 10. Can you write the names of the following objects in the diagram?

28 slide Slide 28 display thermometer What do you call object a? Is it analogue or digital? Why? It is a.... I think it is because..... analogue digital binary switch 10. Can you write the names of the following objects in the diagram?

29 slide Slide Heading:_____________________________________________ Signals in nature are analogue. For example __________________________ _____ (a). It is analogue because it can be any value. ______________________________________ (b) : They can be converted to numbers and easily _____________________ (a). They are easy to store and to compress using mathematical algorithms. Noise ________________________ (b) as much as to analogue signals. When data is transmitted, processed or stored a certain amount of NOISE ________ ____________________ (a). With an analogue signal, noise cannot be _________________________ (b). We have distortion. In a digital signal, noise will not matter, as any signal close enough to a particular value will be interpreted as that value.

30 slide Slide 30 Signals in nature are analogue. For example, sound is an air pressure wave (a). It is analogue because it can be any value. Digital signals have many advantages (b) : They can be converted to numbers and easily processed by computers (a). They are easy to store and to compress using mathematical algorithms. Noise does not affect them (b) as much as to analogue signals. When data is transmitted, processed or stored a certain amount of NOISE enters into the signal (a). With an analogue signal, noise cannot be distinguished from the original signal (b). We have distortion. In a digital signal, noise will not matter, as any signal close enough to a particular value will be interpreted as that value. 11. Heading: Advantages of digital signals and noise.

31 slide Slide Draw the original signal in colour. Which one is more difficult to rebuild? time The signal is easier to reproduce because it can have only values.

32 slide Slide 32 The digital binary signal is easier to reproduce because it can have only two values. time ? 11. Draw the original signal in colour. Which one is more difficult to rebuild?

33 slide Slide 33 Analogue signals are processed by analogue __________ and digital signals are processed by __________ circuits. In between, we can use these electronic circuits to _____________ from analogue to digital and vice versa. ADC: analogue-to-digital converters DAC: digital-to-analogue converters For example, we can get __________ with a microphone and analogue electronics. Then an ADC converts this signal to digital _________. This data can be ____________ and stored in a digital format, such as ________. Home electronics used to be analogue but nowadays everything is mainly digital. So, we have digital TV, digital photography, digital ___________, etc. 12. Listen to the text about the analogue-digital conversion process and fill in the gaps. Analogue INPUT ADC Digital PROCESS OR STORAGE DAC Analogue OUTPUT … …. u1a12.mp3

34 slide Slide 34 Analogue signals are processed by analogue circuits and digital signals are processed by digital circuits. In between, we can use these electronic circuits to convert from analogue to digital and vice versa. ADC: analogue-to-digital converters DAC: digital-to-analogue converters For example, we can get sound with a microphone and analogue electronics. Then an ADC converts this signal to digital data. This data can be processed and stored in a digital format, such as mp3. Home electronics used to be analogue but nowadays everything is mainly digital. So, we have digital TV, digital photography, digital audio, etc. Analogue INPUT ADC Digital PROCESS OR STORAGE DAC Analogue OUTPUT … …. 12. Listen to the text about the analogue-digital conversion process and fill in the gaps.

35 slide Slide 35 a)DAC stands for analogue-digital-conversion. b)Modern electronics is mostly digital. c)To play mp3 music we have to use a DAC. d)Sound is a digital signal. 12. Circle the right answer.

36 slide Slide 36 a)DAC stands for analogue-digital-conversion. b)Modern electronics is mostly digital. c)To play mp3 music we have to use a DAC. d)Sound is a digital signal. 12 Circle the right answer. Digital Mp3 music DAC Analogue OUTPUT … ….

37 slide Slide 37 T / FA cassette tape is the digital evolution of a CD (compact disc) T / FDVB (digital video broadcasting) has no noise because it is an analogue signal T / FAnalogue photography can be easily modified, compressed and transmitted T / FAn ADC converts digital signals to analogue T / FDigital electronic systems are older than analogue systems T / FAll digital signals are binary signals Decide if these sentences are true or false. If they are false change them so that they are true.

38 slide Slide 38 T / FA cassette tape is the digital evolution of a CD (compact disc). A CD is the digital evolution of a cassette tape. T / FDVB (digital video broadcasting) has no noise because it is an analogue signal. DVB has no noise because it is a digital signal. T / FAnalogue photography can be easily modified, compressed and transmitted. Digital photography can be easily modified, compressed and transmitted. T / FAn ADC converts digital signals to analogue. An ADC converts analogue signals to digital. T / FDigital electronic systems are older than analogue systems. Digital electronic systems are newer than analogue systems. T / FAll digital signals are binary signals. All binary signals are digital signals. 13. Decide if these sentences are true or false. If they are false change them so that they are true.

39 slide Slide 39 In the next unit you are going to learn more about analogue electronic circuits. Before you move on make sure that you can answer yes to all these questions. QUESTIONNo More or less Yes Can I order the main developments in electronics and say what decade they happened? Do I know what problems e-waste can cause and how to avoid them? Can I draw a block diagram for a basic electronic system? Can I give examples of analogue, digital and binary signals? Can I compare analogue and digital systems?


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