What do you mean by decoders, Computer Engineering

Assignment Help:

Q. What do you mean by Decoders?

Decoder transforms one kind of coded information to other form. A decoder has n inputs and one enable line (sort of selection line) and 2n output lines. Let's see an example of 3:8 decoder that decodes a 3 bit information and there is just one output line that gets value 1 or in other words out of 23 = 8 lines just 1 output line is selected. So depending on selected output line information of 3 bits can be identified or decoded.           

921_What do you mean by Decoders.png

432_What do you mean by Decoders1.png

949_What do you mean by Decoders2.png

Figure:  3×8 decoder

Please be certain while constructing logic figure wherever values in the truth table are appearing as zero in input and one in output the input must be fed in complemented form for example first 4 entries of truth table comprises 0 in I0 position and therefore I0 value 0 is passed by a NOT gate and fed to AND gates 'a', 'b', 'c' and'd' that implies that these gates shall be triggered/selected only if I0 is 0. If I0 value is 1 then not any of the top 4 AND gates can be selected. Similar kind of logic is valid for I1. Please note output line selected is named 000 or 010 or 111 etc. Output value of only one of lines would be 1. These 000, 010 denotes the label and imply that if you have these I0 I1 I2 input values labelled line would be activated for the output. Enable line is a good resource for joining two 3×8 decoders to make one 4×16 decoder.


Related Discussions:- What do you mean by decoders

Explain the different page replacement policies, Explain the different page...

Explain the different page replacement policies. Various page replacement algorithms are briefly explained below: 1. First-in, first-out FIFO page replacement algorith

Massively parallel system and scalability, Massively Parallel System Re...

Massively Parallel System Refers to a parallel computer system having a great number of processors. The number in a great number of keeps increasing and currently it means more

What are the authentication methods in .net, What are the authentication me...

What are the authentication methods in .NET?   1. WINDOWS AUTHENTICATION 2. FORMS AUTHENTICATION 3. PASSPORT AUTHENTICATION The authentication option for the ASP.N

Calculate the propagation delay for output, Problem: (a) Consider the ...

Problem: (a) Consider the following combinational circuit: (i) Calculate the propagation delay for each output. Assume each gate has a delay of 10 ns. (ii) The abo

What is full trust, What is Full Trust? Your code is permitted to do an...

What is Full Trust? Your code is permitted to do anything in the framework, meaning that all (.Net) permissions are granted. The GAC has Full Trust because it's on the local HD

Explain about memory buffer register, Q. Explain about Memory Buffer Regist...

Q. Explain about Memory Buffer Register? Memory Buffer Register (MBR): It's a register that comprises the data to be written in memory (write operation) or it obtains the data

What is meant by common control, What is meant by common control? In se...

What is meant by common control? In several switching systems, the control subsystem may be an integral part of the switching network itself. This system is termed as direct co

Password, A phonetic password generator picks two segments randomly for eac...

A phonetic password generator picks two segments randomly for each six letter password. form is CVC. what is the total password population? 1> what is the total password population

Technology enablers - information system, Technology Enablers - Information...

Technology Enablers - Information System The progression described above has been enabled by five main factors: Increases in processing capability allowing smaller and

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd