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Topic: Digital logic

  Digital circuit - Wikipedia, the free encyclopedia
A digital circuit is based on a number of discrete voltage levels, as distinct from an analog circuit that uses continuous voltages to represent variables directly.
Digital circuits are the most common mechanical representation of Boolean algebra and are the basis of all digital computers.
Digital logic first became useful when switching speeds got above fifty hertz, because that was faster than a team of humans operating mechanical calculators.
en.wikipedia.org /wiki/Digital_circuit   (4047 words)

 Digital Logic
Logically, we can use these symbols or we can equate them with others according to the needs of the moment.
One essential reason for basing logical operations on the binary number system is that it is easy to design simple, stable electronic circuits that can switch back and forth between two clearly-defined states, with no ambiguity attached.
Digital logic may be divided into two classes: combinational logic, in which the logical outputs are determined by the logical function being performed and the logical input states at that particular moment; and sequential logic, in which the outputs also depend on the prior states of those outputs.
www.play-hookey.com /digital   (645 words)

 Digital Logic
The applications of digital logic involve functions of the AND, OR, and NOT operations.
These theorems can be used in the algebraic simplification of logic circuits which come from a straightforward application of a truth table.
Digital logic involves combinations of the three types of operations for two variables: AND, OR, and NOT.
hyperphysics.phy-astr.gsu.edu /hbase/electronic/diglog.html   (155 words)

 Digital Logic Design
Computers are "digital" systems and we need to master digital design fundamentals and that is the aim of this CECS 201 course.
We begin with the digital system where values are discretized (typically into just two values of say, '1' and '0').
This is achieved by having digital storage elements in the circuits.
www.csulb.edu /~mchelian/DLD.html   (401 words)

 Digital logic, Boolean algebra, Karnaugh maps, Morgans Laws   (Site not responding. Last check: 2007-10-23)
Digital logic Boolean algebra, Boolean variables, Boolean functions, theorems of Boolean algebra, De Morgan's Laws in terms of gates Boolean functions and digital circuits, NAND and NOR, alternative logic gate representations, canonical forms simplification and implementation of Boolean functions, Karnaugh maps
Digital logic and Boolean algebra digital logic and Boolean algebra
Fundamentals of digital logic AND, NAND, OR, NOR, XNOR, EXOR, Morgan, digital logic,
users.telenet.be /educypedia/electronics/digitallogic.htm   (228 words)

 Digital Logic - Gates, Boolean Algebra
Digital logic is the foundation for digital computers.
Each pump controller responds to standard logic signals, that is when the input to the pump controller is 1, the pump operates, and when that input is 0, the pump does not operate.
Five volts is a logical 1, and zero volts is a logical zero.
www.facstaff.bucknell.edu /mastascu/eLessonsHTML/Logic/Logic1.html   (3330 words)

 Welcome to Play-Hookey!
Digital logic is at the core of all digital computers, and yet it is entirely based on three fundamental operations, designated AND, OR, and NOT.
These pages now include coverage of the major logic families as well as some practical experiments that you can perform with real components to see for yourself how they work.
Now that we have begun looking at both digital and analog circuitry, it is only appropriate to start looking at the components that make up these circuits, and to explore their properties.
www.play-hookey.com   (1043 words)

 Digital Logic
Logic example, you can see that in order to get light through the house: the left-front door OR the right-front door (or both) must be Open.
A NOT or Inversion is usually indicated by a Bubble, on either the input or the output of a logic gate symbol.
The convention (which is not always adhered to) is that a POSITIVE Gate Inversion is indicated by a bubble on the output, and with Negative logic the bubble is at the input.
www.williamson-labs.com /480_logic.htm   (658 words)

 Truth Tables for Digital Logic
A truth table shows how a logic circuit's output responds to various combinations of the inputs, using logic 1 for true and logic 0 for false.
The desired output can be achieved by a combination of logic gates.
The input columns are usually constructed in the order of binary counting with a number of bits equal to the number of inputs.
hyperphysics.phy-astr.gsu.edu /hbase/electronic/truth.html   (800 words)

 Circuit Builder
The objective is to devise and to piece together a series of binary logic elements to effect an ultimate mathematical operation such as addition, or subtraction, or multiplication.
It is necessary and sufficient to consider logic elements for which there are two binary inputs and one binary output.
That is, use the circuit builder to establish the logic behavior of AND, NOT, OR, NAND, NOR.
www.jhu.edu /~virtlab/logic/log_cir.htm   (1230 words)

 The Goldfish Online
I had suspected that there would be a large number of logic devices using mechanic principals, but a search for mechanical logic devices didn't get many hits.
I originally considered using a clockwise rotation of an axle for logical 1 and anti-clockwise rotation for logical 0.
Pushing an axle in would be logical 1, and pulling an axle out would be a logic 0.
goldfish.ikaruga.co.uk /logic.html   (378 words)

 digital logic level
At the bottom is the digital logic level, which is the computer's real hardware.
A digital circuit is one in which only two logical values are present.
This circuit is thus an inverter, converting a logical 0 to a logical 1, and a logical 1 to a logical 0.
sankofa.loc.edu /savur/web/digitallogiclevel.html   (4490 words)

 I-Hacked.com Taking Advantage Of Technology - Introduction to digital logic   (Site not responding. Last check: 2007-10-23)
True is a logical 1, which is implemented with a 5-volt signal.
False is a logical 0 and is implemented by a 0-volt signal.
Digital logic only has two states, high or low; so our numbers need to be expressed in a binary (base 2) format.
www.i-hacked.com /content/view/125/44   (4389 words)

 More Digital Logic Gates
The bullet shape of Figure 3A is the standard digital logic symbol for the
We want our digital logic diagrams to be clear, so we want different symbols for each function.
Only when it is time to design the physical layout of an integrated circuit do engineers apply the principle of circuit equivalence to convert the gates in the logic diagram to the gates required by the particular fabrication process to be used.
www.spsu.edu /cs/faculty/bbrown/web_lectures/gates   (798 words)

 Digital Logic MetaStability and Flip Flop MTBF Calculation
Digital Logic State: A defined range of voltages that indicate which logic level the device will switch to, or resides in.
For TTL, a logic low is {0 to.8 volts}, a logic high is {2.4 to 5 volts} [
In most cases newer logic families have smaller Metastability windows which reduce the chance of the device going Metastable.
www.interfacebus.com /Design_MetaStable.html   (1009 words)

 Digital Logic, Electrical and Computer Engineering
An on-line quiz system has been provided for you to help develop your skills in solving problems involving digital logic.
This is your official information source for Introduction to Digital Logic, a freshman-level engineering course, offered by the Department of Electrical and Computer Engineering, currently serving approximately 65 students.
In this course we examine engineering methods for designing digital logic circuits such as what is commonly found in computers and other kinds of digital hardware.
homepages.wmich.edu /~johnson/ece250   (236 words)

 Digital Logic Primer   (Site not responding. Last check: 2007-10-23)
When you have finished studying these concepts, you can cement your comprehension with a companion page, Digital Logic Primer Exam, an on-line, interactive test of this material.
Now that you have familiarized yourself with these concepts, you can cement your comprehension with a companion page, Digital Logic Primer Exam, an on-line, interactive test of this material.
These gates, plus many other devices, are part of a software package called Multimedia Logic, a free program which simulates digital logic circuits.
www.dst-corp.com /James/LogicPrimer/Gates.html   (664 words)

The new edition of this successful textbook provides a clear and comprehensive treatment of representation of data, operations on data, combinatorial logic design, sequential logic, computer architecture and practical digital circuits.
The new edition is enhanced with a chapter on the design of arithmetic processors, covering the design of logic circuits for arithmetic, methods of increasing the speed of operation of arithmetic units and the development of a programmable arithmetic unit capable of performing arithmetic calculations.
In the new edition there is a new chapter on fault diagnosis and logic circuits and the previous material on digital systems has been expanded to form the new chapter on computer architecture.
newton.ticmundi.com /0-412-54970-0.html   (186 words)

 EE2DLD: Digital Logic Design
This module provides a foundation in sequential logic design from which students will be able to proceed to the third level course on Digital Systems Design.
They will gain an understanding of conventional (schematic-based) circuit design techniques and will be able to develop application-specific logic designs in a structured, repeatable, convergent and self-documenting manner.
Their theoretical knowledge will be complemented by implementation skills gained through practical laboratory experience in the design, simulation and implementation of relatively simple circuits using state-of-the-art electronic CAD (ECAD or electronic design automation (EDA)) facilities and application-specific integrated circuits.
www.ee.aston.ac.uk /modules/EE2DLD.html   (513 words)

 Assembly & Digital Logic
COURSE TITLE : Assembly Language and Digital Logic Design TEXT : Intro to Assembly Language Programming by Sivarama Dandamudi ROOM/TIME : AandS 138/1:00 M, Aands 151/9:30 TR 3.
COURSE DESCRIPTION: The internal organization of digital computers is introduced through the study of assembly language.
digital logic design, sequential and combinational circuit design and implementation are introduced.
turing.gcsu.edu /~gadkins/3211syl.html   (370 words)

 EasySim Digital Electronic Simulator
It is an easy to use, yet sophisticated, software tool that integrates the process of designing and simulating the operation of digital electronic circuitry within the context of a Microsoft Windows environment.
Built in library of all common logic blocks, including D type and JK flip flops.
A selection of logic level sources, including constant high and low levels and toggle switches.
www.research-systems.com /easysim/easysim.htm   (392 words)

 Digital Logic - Compare Prices, Reviews and Buy at NexTag - Price - Review
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www.nextag.com /digital-logic/search-html   (339 words)

 Digital Simulator 1.1   (Site not responding. Last check: 2007-10-23)
Digital Simulator is Electronic Design Automation software without the $50,000 price tag.
If you work for an educational institution or are a student, Digital Simulator is absolutely free.
Digital Simulator has a toolbar of digital circuit elements, including logic gates, flip-flops, switches, and indicators.
web.mit.edu /ara/www/ds.html   (117 words)

 Howstuffworks "How Electronic Gates Work"
If you have read the HowStuffWorks article on Boolean logic, then you know that digital devices depend on Boolean gates.
You also know from that article that one way to implement gates involves relays.
In this article, you will see how you can experiment with all of the gates discussed in the Boolean logic article.
www.howstuffworks.com /digital-electronics.htm   (135 words)

 Digital Logic Design Digital Programmable Circuit Design Engineer Jobs
Logic Design inc, the Programmable Logic Controllers textbook provides technical training for PLC...
Digital design production house, True Life Creations, has been awarded a $1 million Federal Grant to construct a global training centre for 3D animation in...
At Logic Design & Development our IT consulting services are aimed at giving clients the ability to choose from the best...
www.logic1.com /digital-logic   (601 words)

 Digital Logic Design, Digital Logic Gates Notes, VHDL Tutorial
Digital Logic Circuit Analysis and Design - by Nelson, Nagle, Carroll, Irwin
Learn basic digital design paradigms and the necessaryVerilog HDL constructs that would help me build small digital circuits, using Verilog and run simulations.
Digital Logic Design Manual Pages - A number of tools developed for the digital design class
www.onesmartclick.com /engineering/digital-logic-design.html   (426 words)

 Welcome to PURE Digital - World Leaders in DAB Digital Radio
In addition to existing FM or AM stations now broadcasting digital radio, new stations are being created constantly and some of these stations are unique to digital radio.
PURE Digital Oasis Rechargeable Weatherproof DAB Digital Radio
PURE Digital Demonstrates Most Advanced Handheld DAB Radio
www.videologic.com   (536 words)

 Cirrus Logic Home Page
If so, it might surprise you to learn that they all have at least one thing in common: their audio was brought to you by Cirrus Logic’s CobraNet® technology.
CobraNet technology is the most widely used technology for digital audio networking over Ethernet.
Cirrus Logic to Present at the Wachovia Securities Equity Conference
www.cirrus.com   (164 words)

 ELE172: Digital Logic
To learn to realize simple combinational and sequential digital logic circuits using discrete components and simple programmable logic devices
Students will be familiar with the axioms of Boolean algebra and will understand the role they play in the theory of of digital logic circuits
You will have the opportunity to design, build and test a number of digital logic circuits using modern equipment and computer software.
www.usm.maine.edu /~mjankowski/docs/ele172   (275 words)

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