DIGITAL DESIGN - PowerPoint PPT Presentation

slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
DIGITAL DESIGN PowerPoint Presentation
Download Presentation
DIGITAL DESIGN

play fullscreen
1 / 32
DIGITAL DESIGN
159 Views
Download Presentation
dunne
Download Presentation

DIGITAL DESIGN

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

    1. DIGITAL DESIGN ICS 30/CS 30

    2. mariaramilaisidrojimenez XUCC DIGITAL DESIGN logic design switching circuits digital logic digital systems Digital design is concerned w/ the design of digital electronic circuits. The subject is also known by other namesDigital design is concerned w/ the design of digital electronic circuits. The subject is also known by other names

    3. mariaramilaisidrojimenez XUCC digital computers electronic calculators digital control devices digital communication equipment many other applications that require electronic digital hardware DIGITAL DESIGN Digital circuits are employed in the design of systems such as This subject presents the basic tools used in the design of digital circuits and provides a number of methods and procedures suitable for a variety of digital design applicationsDigital circuits are employed in the design of systems such as This subject presents the basic tools used in the design of digital circuits and provides a number of methods and procedures suitable for a variety of digital design applications

    4. mariaramilaisidrojimenez XUCC SSI circuits contain several gates or flip-flops in a single package MSI devices provide specific digital functions LSI devices provide complete computer modules DIGITAL DESIGN The components used to construct digital systems are enclosed within IC packages. It is important that the digital designer be familiar w/ the various digital components encountered in IC formThe components used to construct digital systems are enclosed within IC packages. It is important that the digital designer be familiar w/ the various digital components encountered in IC form

    5. mariaramilaisidrojimenez XUCC general-purpose digital computer Best-known example of a digital system telephone switching exchanges digital voltmeters frequency counters calculating machines teletype machines DIGITAL SYSTEMS Digital computers and digital systems; many uses of computers Its most striking property is its generality. It can follow a sequence of instructions, called a program, that operates on given data. The user can specify and change programs and/or data according to the specific need. As a result of this flexibility, general-purpose digital computers can perform a wide variety of information-processing tasks. Other examples of a digital systemDigital computers and digital systems; many uses of computers Its most striking property is its generality. It can follow a sequence of instructions, called a program, that operates on given data. The user can specify and change programs and/or data according to the specific need. As a result of this flexibility, general-purpose digital computers can perform a wide variety of information-processing tasks. Other examples of a digital system

    6. mariaramilaisidrojimenez XUCC Its manipulation of discrete elements of info. electric impulses decimal digits letters of an alphabet arithmetic operations punctuation marks any other set of meaningful symbols DIGITAL SYSTEMS CHARACTERISTIC OF A DIGITAL SYSTEM Discrete elements may beCHARACTERISTIC OF A DIGITAL SYSTEM Discrete elements may be

    7. mariaramilaisidrojimenez XUCC A sequence of discrete elements forms a language, i.e. a discipline that conveys info. discrete information processing system Discrete elements of info. are represented in a digital system by physical quantities called signals. Electrical signals such as voltages and currents are the most common. DIGITAL SYSTEMS The JUXTAPOSITION of discrete elements of information represents a quantity of info. An exampleletters c, a, t form the word cat ; digits 135 form a number, thus Early digital computers were used mostly for numerical computations. In this case the discrete elements used are the digits. From this application, the term digital computer has emerged. A more appropriate name would be a The JUXTAPOSITION of discrete elements of information represents a quantity of info. An exampleletters c, a, t form the word cat ; digits 135 form a number, thus Early digital computers were used mostly for numerical computations. In this case the discrete elements used are the digits. From this application, the term digital computer has emerged. A more appropriate name would be a

    8. mariaramilaisidrojimenez XUCC Digital systems that are constrained to take discrete values are further constrained to take binary values. An analog computer performs a direct simulation of a physical system* The term analog signal is sometimes substituted for continuous signal because analog computer has come to mean a computer that manipulates continuous variables. DIGITAL SYSTEMS The signals in all present-day electronic digital systems have only two discrete values and are said to be binary. The digital system designer is restricted to the use of binary signals because of the lower reliability of many-valued electronic circuits. In other words, a ckt. w/ 10 states, using one discrete voltage value for each state, can be designed, but it would possess a very low reliability of operation. In contrast, a transistor ckt. That is either on or off has two possible signal values and can be constructed to be extremely reliable. Bec. Of this physical restriction of components, and bec. Human logic tends to be binary, Each section of the computer is the analog of some particular portion of the process under study. The variables in the analog computer are represented by continuous signals, usually electric voltages that vary w/ time. The signal variables are considered analogous to those of the process and behave in the same manner. Thus measurements of the analog voltage can be substituted for variables of the process. The signals in all present-day electronic digital systems have only two discrete values and are said to be binary. The digital system designer is restricted to the use of binary signals because of the lower reliability of many-valued electronic circuits. In other words, a ckt. w/ 10 states, using one discrete voltage value for each state, can be designed, but it would possess a very low reliability of operation. In contrast, a transistor ckt. That is either on or off has two possible signal values and can be constructed to be extremely reliable. Bec. Of this physical restriction of components, and bec. Human logic tends to be binary, Each section of the computer is the analog of some particular portion of the process under study. The variables in the analog computer are represented by continuous signals, usually electric voltages that vary w/ time. The signal variables are considered analogous to those of the process and behave in the same manner. Thus measurements of the analog voltage can be substituted for variables of the process.

    9. mariaramilaisidrojimenez XUCC