Digital Electronics And Pulse Techniques Pdf
The Digital Electronics Basics series present the fundamental theories and concepts taught at entry level electronics courses at both 2 year and 4 year institutions. This series of content provides examples to professors to enable them to easily teach concepts to students, who can develop a solid underlying knowledge of digital electronics using NI solution. This series focuses on some of the basic theory as well as providing the NI Multisim circuits to enable practical implementation and experimentation as homework for students. Table of Contents.
Timing Circuits
DIGITAL PULSE WIDTH MODULATION TECHNIQUES FOR POWER CONVERTERS by THANUKAMALAM ARUNACHALAM A THESIS Submitted in partial fulfillment of. Digital Electronics and Pulse Technique. Batch: CSE 40(A). Analysis and design of digital integrated circuits and systems. Pulse-Bias Electronics and Techniques for a. A digital pulse generator to produce programmable unipolar dc voltages, in which the resulting time-averaged voltage was.
In this Chapter We begin this chapter by studying the basic logic gates and understanding the fundamentals as well as the basic rules of Boolean algebra and expression simplification. Then we examine an example circuit that can be used by any educator or student to verify our results using NI Multisim. If you do not have NI Multisim installed on your computer you can download a free 30 day evaluation at 2. Example Courses Listed below are example courses that teach this concept at their schools. Course Name School Learn More Digital Electronics Basics Macomb Community College Digital Circuits 1 Henry Ford Community College 3. Basic Logic Gates Logic gates constitute the foundation blocks for digital logic. Let us start by reviewing these gates and their truth tables: An AND Gate has two or more inputs and produces one output as follows: output = 1 if all of the inputs are high, output = 0 if one or more of the inputs are low 1.
An OR gate also has two or more inputs and produces one output as follows: output = 1 if one or more inputs are high, output = 0 if all inputs are low 1: The inverter gate has one input and produces one output as follows: output =1 if input is low, output = 0 if input is high 1. The NAND gate has two or more inputs and produces one output as follows: output = 0 if all the inputs are high, output = 1 if any of the inputs are low 1. The NOR gate has two or more inputs and produces one output as follows: output = 1 if all inputs are low, output = 0 if any of the inputs is high 1. The Exclusive-OR gate always has two inputs only and produces one output as follows: output = 1 when inputs are not similar, output = 0 when inputs are the same 1. The Exclusive-NOR gate always has two inputs only and produces one output as follows: output = 1 when inputs are both high or are both low, output = 0 when inputs are not similar 1. Boolean Algebra Boolean algebra has similar rules to other algebras and these rules are used to manipulate the expression at hand. Some of these basic rules are 2: One variable: A.
A = A A + A = A One variable and 0 or 1: A. 1 = A A + 0 = A A + 1 = 1 DeMorgan’s Theorem: (A + B)’ = A’.
B)’ = A’ + B’ Associative: (A. C) (A +B) + C = A + (B + C) Commutative: A. A A + B = B + A Distributive: A.(B + C) = A. C) = (A + B). (A + C) Note: OR operator is represented by the ‘+’ symbol and has the lowest precedence.
NOT operator is represented by the “ ‘ “ symbol and has the highest precedence. AND operator is represented by ‘.’ symbol and is in the middle 2. Example Exercise STEP 1: Simplify the following expression: ABC’D + AB’C’D + A’BCD + AB’CD + A’BCD’ 3 Answer Sub-Step 1: Using the above rules we can simplify the expression as follows 3: ABC’D + AB’C’D + A’BCD + AB’CD + A’BCD’ = ABC'D + AB'C'D + A'BCD + A'BCD'+ AB'CD = AC'D(B+B') + A'BC(D+D') + AB'CD = AC'D(1) + A'BC(1) + AB'CD = AC'D + A'BC + AB'CD = AC'D + AB'CD + A'BC = AD(C'+B'C) + A'BC = AD((C'+B')(C'+C)) + A'BC = AD((C'+B')(1)) + A'BC = AD(BC)' + A'BC 6. Example Problem STEP 2: Using NI Multisim, open circuit file “logicgates.ms12”.
You will notice the circuit below. 4 The above circuit shows the different connections of logic gates used to control a machine (indicated by an LED) in a workshop. There are On/Off switches, micro-switches, as well as emergency stop switches available (SW1 &SW2, SW3 & SW4, SW5 & SW6 respectively). Answer Sub-step 2: Based on the circuit above, determine the switch combination that will turn the machine on. Based on the individual truth tables for each of the logic gates, we start from the far right working our way back to determine the combination of bits or switches that will enable the LED to turn on or in other words the output of ‘U5’ to be equal to 1 4: Input Output SW1 & SW2 SW3 & SW4 SW5 & SW6 LED 11 11 00 1 11 11 01 1 11 11 10 1 01 11 00 1 01 11 01 1 01 11 10 1 10 11 00 1 10 11 01 1 10 11 10 1 STEP 3: Using circuit file “logicgates.ms12”, toggle the switches to replicate our findings and verify our combinations. You will notice that the LED will turn on when the above combinations are selected as shown below: 7. NI Suggested Solution National Instruments offers a number of products that combine to provide a scalable and powerful teaching platform for educators.
The solution includes: NI Multisim circuit teaching environment: Combining an intuitive circuit definition environment, with powerful SPICE simulation technology, educators can use NI Multisim to easily teach the ins-and-outs of circuits in a safe environment. NI ELVIS teaching and measurement platform allows educators to provide students with a compact, all-in-one unit for their measurement and analysis needs.
Combining an oscilloscope, function generator, DMM, bode analyzer and 8 other instruments into a small platform; it simplifies the laboratory experience for students and lab instructors. References 1 Bartelt, Terry. Wisconsin Technical College System. Basic Logic Gates. 2 Imperial College, London. Department of Computing. Lecture 1: An Introduction to Boolean Algebra.
3 Purdue University. College of Science, Department of Computer Sciense.
Exercise on Boolean Algebra. 4 Technical University. VINACeL online training portal of Technical University.
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Job Search Digital communication is the process of devices communicating information digitally. This tutorial helps the readers to get a good idea on how the signals are digitized and why digitization is needed. By the completion of this tutorial, the reader will be able to understand the conceptual details involved in digital communication. Audience This tutorial is prepared for beginners who are interested in the basics of digital communications and who aspire to acquire knowledge regarding digital communication systems. Prerequisites A basic idea regarding the initial concepts of communication is enough to go through this tutorial.
It will definitely help if you use our tutorial Signals and Systems as a reference. A basic knowledge of the terms involved in Electronics and Communications would be an added advantage.