From switches to transistors, logic gates and logic circuits hakim weatherspoon cs 3410, spring 20. Every boolean function can be realized by a andornot gates i. These two levels are term high and low, or true and false, or on and off, or simply 1 and 0. We will look at the behavior of some basic logic gates, including inverters, and gates, or gates, xor gates, nand gates, and nor gates. Perform these experiments and get your first working experience with dld. This laboratory course enables students to get practical experience in design, realization and.
These power supplies can accommodate a variety of needs. Experience in designing a circuit using the 7400 series logic gates 5. Vlsi design notes pdf vlsi pdf notes book starts with the topics basic electrical properties of mos and bicmos circuits, logic gates and other complex gates, switch logic, alternate gate circuits, chip level test techniques, systemlevel test techniques, layout design for. To realize the full subtractor circuit using basic logic gates and verify their truth tables. You must prepare for this lab by designing and drawing the schematic diagrams ofthe following circuits, made up entirely of nand gates.
Diode logic gates utilize the properties of a semiconductor diode in forward or reverse bias. The truth table is a tabular representation of a logical expression. Lab manual for gates introduction to electronics gates, earl on. Students should have a solid understanding of algebra as well as a rudimentary understanding of basic electricity including voltage, current, resistance, capacitance, inductance and how they relate to direct current. The objective for conducting these experiments, is to see how the operation of logic gates work. Ece 15 digital logic design laboratory manual laboratory equipment description dr. To become familiar with the use of a standard breadboarding device 2. Draw the layout of the 4inverter chain using the quad nand ic. Inputs and outputs of logic gates can occur only in two levels. Combinational logic circuits sequential logic circuits how digital logic gates are built using. Give the truth table for exnor and realize using nand gates. Lab 10 ttl and cmos logic gates simon fraser university. To get acquainted with different standard integrated circuits ics.
Each of these gates is embedded in an integrated circuit package. Viewing the video is a mandatory pre lab assignment. Furthermore, in order to see how these different logic gates work, they will be used in separate circuits and have their own truth tables, so that it is easier to tell. To write vhdl code for all basic gates, simulate and verify functionality, synthesize. Implementation of gates and chips using the laws of physics, for example, the. Experiment 2 basic logic gates implementation using. In digital electronics, logic gates are the certain type of physical devices basically used to express the boolean functions. The experiments in this laboratory exercise will provide an introduction to digital electronic circuits.
After the completion of laboratory the student will be able to. Boolean expression realization using logic gates 2. Lab 1 part 2 identify the 7400 series ttl gates and look up their data sheets. Digital electronics part i combinational and sequential logic. To design and implement encoder and decoder using logic gates and study of ic 7445 and ic 74147. Basic logic gates pdf created with pdffactory trial version.
To implement an inverter using nand or nor gates 4. In this topic, we will study the essential features of digital logic circuits, which are at the heart of digital computers. To study about logic gates and verify their truth tables. This lab manual provides an introduction to digital logic, starting with simple gates and. Describe how is the led a simple visual indicator of a not gate.
And, or, not nand and nor gates objective the purpose of this laboratory is to introduce the use and features of the logic lab unit ets7000 digital analog training system and to introduce the ttl integrated circuit and,or and not inverter gates. What are the logic low and high levels of ttl ics and cmos ics. Simplify the given boolean expression and to realize them using logic gates universal gates. When all the input combinations of a logic gate are written in a series and their corrresponding outputs written along them, then this input. From transistorsto logic gates and logic circuits prof. Acquiring design experience in using a truth table to implement a logic circuit 4. Background diode logic dl or diode resistor logic drl is a logic family that uses only diodes and the resistors in the implementation of the logic functions. You will learn how to use the idl800 bit bucket breadboarding system to build circuits using common logic gates. The purpose of this experiment is to introduce you to the basics of circuit wiring, troubleshooting, positivenegative logic, threshold voltages, clock, delay concepts, and gate behavior.
Logic functions can be implemented in several ways. Introduction figure 1 shows a close up of the logic trainer pcb printed circuit board you will use as an introduction to designing combinational and sequential logic circuits. Objective of this laboratory manual is to teach students about electronics components, characteristics of semiconductor devices and design rectifiers, filters and amplifiers, simple electronic circuits. What r do you use in your led logic probe and how much current is flowing through the led. All lab work must be shown in the lab report for the following logic gates, verify the logic operation each gate performs. Digital logic introduction the aim of the digital logic lab was to construct a simple 4bit arithmetic logic unit alu in order to demonstrate methods of using boolean algebra to manipulate and solve various logic problems. The experimental objective of this lab is to design a combinational logic circuit that will activate under specific conditions and test it using labview. With cengage unlimited you get all your cengage access codes on platforms like mindtap and webassign plus online versions of your textbooks for one price per semester.
It shows the outputs generated from various combinations of input values. When all the input combinations of a logic gate are written in a series and their corresponding outputs written along them, then. Setup in the scf file the input signals as shown below and draw the output f as obtained from simulation. Furthermore, in order to see how these different logic gates work, they will be used in separate circuits and have their own truth tables, so that it is easier to tell how they differ from each other, and how they would work. Elec 2210 experiment 1 basic digital logic circuits. This lab manual provides an introduction to digital logic, starting with simple gates and building up to state machines. Package, gate and pin labeling there are many methods than can be used to label a circuit.
Computer interfacing lab first floor, electrical department lab venue the digital logic design lab dld lab is one of the most important and well equipped lab of the department of electrical engineering at university of engineering and technology, lahore. Design a logic network that takes as its input a 4bit, ones complement number and generates a 1 if that number is odd 0 is not odd label the inputs a, b, c and d, where a is the most significant bit implement your design in standard sumofproducts representation using only nand gates. Objectives the various operational modes of diodes and bipolar junction transistors will be investigated using simple diode logic dl, diodetransistor logic dtl, and transistortransistor logic. Realize the ex or gates using minimum number of nand gates.
Digital logic circuits form the basis of any digital computer system. No formal pre lab submission is required for this lab assignment 4 lab procedure we will look at the behavior of logic gates in figure 1. To study and verify the truth table of logic gates apparatus required. Digital trainer kit 01 and gate ic 7408 01 or gate ic 7432 01 not gate ic 7404 01 nand gate 2 input ic 7400 03 xor gate. Simplify the boolean expression and build the logic circuit. Guarantee guarantee and liability claims in the event of injury or material damage are excluded when they are the result of one of the following. A table which lists all possible combinations of input variables and the corresponding outputs is called a truth table it shows how the logic circuit. To study the truth tables of various basic logic gates 2. For contact information and other cool flash projects visit his site.
Digital electronics part i combinational and sequential. Clemson university department of electrical and computer. And and or functions can be implemented using the diode logic. Today you will be introduced to the circuits of digital electronics.
Eee 332 digital electronics lab experiment 1 diode logic a. Also show their logic symbol, use the function in an equation and show the truth table for one gate in each of the integrated circuits. Instead of creating the circuit using basic logic gates, one can write the vhdl code. Course outcomes write verilog code for the all logic gate circuits and their test bench for verification, observe the waveform and synthesize the code with the technological library, with the given constraints. Heath digital design experimenter switching diodes 1k and 10k ohm resistors 7408 quad dual input and chip. The experimental objective of this lab is to design two systems using labview. Show the actual physical layout of the circuit top view on the breadboard. From these three basic logic gates, the most powerful computer can be made. Logic gates are the basic building block of digital circuits. Anne bracy cs 3410 computer science cornell university the slides are the product of many rounds of teaching cs 3410 by. This document logic design lab manual consists of below experiments.
We will start with some circuits made with discrete electronics to perform logical and, or and not functions. Implementation of the given boolean function using logic gates in both. In the past, vacuum tube and relay circuits performed logic functions. Describe in your lab report each of their functions. Introduction to logic gates not, and, nand, or, nor. Use the lab notes to write the procedure section of the lab report. Logic gates are electronic circuits which perform logical functions on one or more inputs to produce one output. Introduction to digital electronics lab nomenclature of digital ics, specifications, study of the data sheet, concept of v1 cc and ground, verification of the truth tables of logic gates using ttl ics. Laboratory manual digital systems and logic design. Introduction to digital logic with laboratory exercises. Note there are no constraints on the number of gate inputs.
Basic logic gates implementation using breadboards and discrete gates introduction. Digital logic circuits many scientific, industrial and commercial advances have been made possible by the advent of computers. Thus the multiplexer and demultiplexer circuits are designed and implemented using logic gates, ic 74150 and ic 74154. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. To understand formulation of boolean function and truth table for logic circuits. The logic lab is a application for simulating simple circuits of logic gates on the screen. Laboratory manual ece 2090 logic and computing devices clemson university department of electrical and computer engineering clemson, sc 29634.
Construct the inverter chain, using a wire to apply either vdd5vlogic 1 or vss0vlogic 0 to the chain input. Eclab users manual california institute of technology. To study and verify the truth table of logic gates. The basic logic gates are the basic building blocks of more complex logic circuits. Eg1003 lab notes paper can be downloaded and printed from the eg1003 website.
Experimental details are easily forgotten unless written down. Which are the logic gates whose all output entries are logic 1 except for one entry there is logic 0. Digital logic design laboratory page 3 dld lab venue. Pdf digital logic designs experiments suddiyas nawaz. Introduction to digital logic with laboratory exercises 4 a global text. Presently logic functions are performed by tiny integrated circuits ics. Muffakham jah college of engineering and technology.
Nand gates can be combined to form other logic gates. Algebraic manipulation as seen in examples karnaugh k mapping a visual approach tabular approaches usually implemented by computer, e. Logic gates objective to get acquainted with the analogdigital training system. 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. By doing this the wiring and testing process will be done very easily in the lab. It is so called as because by using of this gate we can make any gate like not, or, and etc. These logic gates perform the basic boolean functions, such as and, or, nand, nor, inversion, exclusiveor, exclusivenor. Design and implementation of halffull adder and subtracter using logic gates universal gates.
At the end of each lab, a ta will scan the lab notes and upload them to the lab documents section of the eg1003 website. Its an experimental project of freelance flash platform developer kris temmerman. Muffakham jah college of engineering and technology affiliated to osmania university. The output x of a circuit is a logic high only when input a is a logic low and input b is a logic high or input a is a logic high and input b is a logic low. Some logic circuits operate at voltages other than 5v and many linearanalog parts require both positive and negative voltages for their operation. A gate is an electronic device which is used to compute a function on a two valued signal. Logic gates and truth table and, or, not, nor, nand, xor. Write a logic function that is true if and only if x, when interpreted as an unsigned binary number, is greater than the number 4. Design and implementation of i parallel addersubtracter and ii bcdto excess3code converter and vice versa.
943 560 237 869 1388 154 95 742 984 314 803 355 287 729 1680 1142 1293 998 1261 1486 697 713 506 127 1083 602 1430 277 967 1138 435 750