Teach computing computing, computer science, and information technology resources for gcse, igcse, ib, and gce alevel. And not or v complete the diagram in part a above to show how the two logic gates are used to connect the input sensors to the relay. After all, computer data is either 1 logic true or 0 logic false. Most logic gates have two inputs and one output and are based on boolean algebra. Chapter 3 logic gatescircuits computer science igcse.
Cambridge igcse computer science coursebook pdf free. An explanation of not, and, or and xor logic gates. A train of logic gates is also known as a logic circuit and they are designed to carry a specific function. Each gate performs a specific logic function behind which there is an equivalent transistor based electronic circuit. Gce ol al ict git past papers, model paper, notes, syllabus. Anne bracy cs 3410 computer science cornell university the slides are the product of many rounds of teaching cs 3410 by professors weatherspoon, bala, bracy, and sirer. We will see the different logic levels in ttl circuits, cmos circuits, some simple logic gates like or, not, nand, and, etc. I found very few resources for this odd topic in igcse physics so i created this powerpoint for my classes.
This is an inverter gate, so named because its output is always the opposite inverted state as the input. Shows symbols and truth tables for the following logic gates. You can write logic statements to represent a logic gate or logic circuit. The figure below shows a logic circuit and its incomplete truth table. Every terminal in a logic gate will be in one of the two binary states 0 or 1. There are many electric circuits in computers and devices. Logic gates are the building blocks of digital circuits. Introduction to logic gates using transistor technology, we can create basic eve engels, 2006 slide 1 of 20 logic gates that perform boolean operations on high 5v and low 0v signals. Designed for the cambridge igcse computer science course, this presentation is applicable to other exam boards as well. Mar 25, 2019 in the practice of electronics, a logic gate is a device which carries out a logical operation on a certain number of binary inputs and produces just one binary output.
Hazel takes you through all you need to know about logic gates for the cie igcse physics course, including and, or, not, nand and nor gates. Understand and define the functions of not, and, or, nand, nor and xor eor gates. These are some o level past papers questions of logic gates for people who have difficulty in solving them. Suitable for gcse computer science classes and ks3 computing classes. Introduction to logic gates gcse computer science bbc. Also offers zclass high quality past paper walkthroughs made in partnership with cambridge leadership college. Basic logic gates types, functions, truth table, boolean. For students, by students znotes ciecaie igcse,as,a. Also offers zclass high quality past paper walkthroughs made in.
It is very important to note that normal logic does not have anything inbetween, there is no slightly true or slighty false result. Aim to study about logic gates introduction logic gates are. Gce ol al ict git past papers, model paper, notes, syllabus for free download msc bit bsc hnd edxcel php web application projects assignments guidance. A logic gate is a building block of a digital circuit. What is logic gate and, or, xor, not, nand, nor and xnor. X will only be 1 if neither of the inputs are 1 and both of them are not 1. Recognise and use the standard symbols used to represent logic gates. Written by experts, who bring a wealth of theoretical knowledge and practical experience to both the book and. Aim to study about logic gates introduction logic gates are related with boolean algebra, which differ from both ordinary and binary algebra. Identify what type of logic function is represented by this gate. If you see them, you can easily answer any upcoming examunit as they pick questions from past papers.
This is a good starting point for a lot of topics not just for the igcse course. Online igcse centre about to help on edexcel, gce a level, cie a level, gce advanced level and for gcse exams. Crude logic gates circuits may be constructed out of nothing but diodes and resistors. It is easiest to understand this by looking at an example. Activities and resources for the cambridge igcse computer science 0478 topic 1. Logic gates 4 oo software design and construction 2input logic gate hierarchy it is sensible to view each of the 2input logic gates as a specialized subtype of a generic logic gate a base type which has 2 input wires and transmits its output to a single output wire. Computer science igcse providing education for computer science knowledge seekers. Boolean logic reflects the binary logic of logic gates and transistors in a computers cpu. Logic gate questions 1 this question is about not and and logic gates. Cambridge igcse computer studies revision guide cambridge education cambridge university press samples. When using an and logic gate, the output will only be high voltage if both parts are high voltage. Igcse ict has notes on many topics including input and output devices. Chapter 3 logic gates and logic circuits franks igcse. Underline the names of the two logic gates that should be used inside the control box.
Pdf, 148kb 2015 paper 2 specimen paper pdf, 306kb 2015 paper 2 specimen paper markscheme pdf, 120kb 2015 paper 2 specimen prerelease material pdf, 119kb 2020 specimen paper 1 pdf, 414kb 2020 specimen paper 1 mark scheme pdf, 233kb. Logic statements are also known as boolean statements or boolean logic. While drawing on many of the topics in the parent book that are relevant to computer studies, this. Logic gates and, or, not teachers notes time min activity further notes 5 remind students that data and instructions are based on a binary system which uses two states on or off, true or false, 1 or 0. In the practice of electronics, a logic gate is a device which carries out a logical operation on a certain number of binary inputs and produces just one binary output. Logic gates and, or, not cambridge gcse computing online. Logic gates this note explains the basic concept of logic gates and provide the example of application.
Teachict ocr gcse computing binary logic, truth tables and. From transistorsto logic gates and logic circuits prof. Logic gates and logic circuits igcse computer science. Igcse ict has notes on many topics including input and output devices that are useful for a range of ict and computing courses. Feel free to browse around for files, resources, videos and information that will help you within your courses. Introducing cie computer science 2210 notes and worsksheets from2009. Basic logic gates, truth tables, and functions explained logic gates are the basic building blocks used typically in the field of digital electronics. If you continue to use this site we will assume that you are happy with it. Question 1 identify the type of logic gate shown in this schematic diagram, and explain why it has the name it does. If you are in search of the source files for the tasks of igcse ict. U n i t 3 data communications and networking 3 data transmission between a processor and its peripherals, and between computers in a network, is a central element in everyday life. Logic gates practice problems key points and summary first set of problems from q. Jun 19, 2019 in this tutorial, we will have a brief introduction to logic gates.
Cambridge igcse computer science coursebook pdf free download. To gain unauthorized access to data in a system or computer. Aug 29, 2015 these are some o level past papers questions of logic gates for people who have difficulty in solving them. Chapter 3logic gates and logic circuits igcse computer. Here is the official textbook for igcse computer studies 0478 textbook 201516 cambridge. Endorsed by cambridge international examinations now including brian sargent in the expert author team, alongside first edition authors graham brown and david watson, this book has been fully revised and updated to cover every part of the latest cambridge igcse ict 0417 syllabus. Remember that a nor gate is essentially the opposite of an or gate. Ict lounge free ict resources new content for igcse. Today, carrie anne is going to take a look at how those transistors we talked about last episode can be used to perform complex actions. In this the variable permitted to have only values true offalse usually written as 1 or 0. Explain their significance and point out the different kinds of logic gates. Teachict ocr gcse computing binary logic, truth tables. Aug 31, 2016 i found very few resources for this odd topic in igcse physics so i created this powerpoint for my classes. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Aug 26, 2015 logic gates summary tables this is has been the latest topic in class, and to make learning it easier, one of our assignments was to create a summary table of all possible inputs and all possible outputs of threeinput and twoinput logic gate systems. Like its companion volume, cambridge igcse ict, this book has evolved from igcse and o level. Each logic gates contain different functions, they take binary inputs and produce a binary output. How the logic circuits can be designed using these gates. The truth table is used when checking the output from a logic gate or a logic circuit. Logic gates and truth tables worksheet pack teaching resources. It explains the differences between the three logic gates and also when two or more are combined. In this chapter we will look at how logic gates are used and how truth tables are. Introduction to logic gates not, and, nand, or, nor. Start studying igcse computer science logic gates and logic circuits.
In this tutorial, we will have a brief introduction to logic gates. A hub of free ict resources for key stage 3, gcse and igcse covering both practical and theory content. Basic logic gates, truth tables, and functions explained. High quality ciecaie igcse,as,a level, and sat revision notes made by students, for students. Igcse information and communication technology ict. Thousands of logic gates could be found in electronic circuits in computers, many new memories and lots of controlling devices. It offers bolster on hypothetical and down to earth parts of the cambridge international examinations computer science 0478 syllabus, composed by experienced software engineering mentors. Every terminal in a logic gate will always be in one of the two binary states 0 or 1. A gate is an electronic device which is used to compute a function on a two valued signal. Welcome to the new, fullcolour cambridge igcse computer studies. Mar 29, 2014 covers not, and, or, nand and nor logic gates. Introduction thousands of logic gates could be found in electronic circuits in computers, many new memories and lots of controlling devices.
In the following quiz, we aim to put your knowledge on these logic gates to the test, offering up tables, diagrams and more to gauge the level of understanding you have on the topic. Logic gates take binary inputs and produce binary outputs. A good way to test your grasp of logic gates is to download one of the many apps that teach you about them. While drawing on many of the topics in the parent book that are relevant to. At any given moment, every terminal is in one of the two binary conditions false high or true low. Gce ol al ict git past papers, model paper, notes, syllabus for free download. Logic gates have one or two inputs that can be turned on or off, the output from the gate will vary depending on the type of logic gate. Complex logic gates boolean logic gcse computer science. So in this chapter i will be sharing and discussing my knowledge on logic gates and give out functions and roles of them. Identify the type of logic gate shown in this schematic diagram, and explain why it has the name it does.
Cambridge igcse computer science coursebook pdf cambridge igcse computer science gives an extensive coursebook that spreads late improvements in software engineering. These binary states represent the presence 1, or absence 0, of an electrical voltage. Logic gates perform basic logical functions and are they are the fundamental building blocks of. New memories and thousands of things controlling the device are made up of logic gates. Learners following the cambridge igcse computer science syllabus develop their understanding of the main principles of problem solving using computers. The notes are very comprehensive, clearly divided into sections, well illustrated, and easily understandable for students. Nov 21, 2014 gce ol al ict git past papers, model paper, notes, syllabus for. Binary 1 can be referred to as positive or on, whilst binary 0 can be called negative or off.
Pdf cambridge igcse computer studies revision guide. Logic gates are the electronic circuits in a digital system that are mainly based on the boolean function. Boolean algebra boolean logic gcse computer science. Mar 08, 2017 2 worksheets and 1 homework task help you teach logic gates and truth tables. Setup in the scf file the input signals as shown below and draw the output f as obtained from simulation. Introduction electric circuits in computers have little memory control devices called logic gates. And not or v complete the diagram in part a above to show how the two logic gates are used to. The early designers of computers quickly realised that logic can be used within a computer to work out problems. Logic gates put in binary values and output a binary value as well. There is an intro to boolean language and binary but not too much. She also goes through a couple of example questions. Igcse computer studies 0478 textbook 201516 cambridge. Logic gates are the building blocks of a digital circuit.