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

Show the steps of execution of instructions, Q. Show the steps of execution...

Q. Show the steps of execution of instructions? Fetch First Instruction into CPU: Step 1: Find/calculate the address of first instruction in memory. In this machine illust

What is central processing unit, What is Central Processing Unit Centra...

What is Central Processing Unit Central Processing Unit (CPU) performs all the arithmetic and logical calculations in a computer. The CPU is said to be the brain of the compute

Branch (control) hazards in computer architecture, Branch (control) hazards...

Branch (control) hazards in computer architecture : Branching hazards (also called control hazards) take place when the processor is told to branch -for example, if a defin

Produce a sequence diagram for the task add, This assignment is based on th...

This assignment is based on the 'Swansea Docklands Heritage Society' case study attached.  The assignment is the third of three related submissions, all based on the Swansea Dockla

Switch statement with the use of nested if-else statement, Compare the use ...

Compare the use of switch statement with the use of nested if-else statement. If-else statement:  When there are many conditional statements that may all evaluate to true, bu

What is hysteresis, What is hysteresis? Hysteresis is well known in fer...

What is hysteresis? Hysteresis is well known in ferromagnetic materials. When an external magnetic field is applied to a Ferro magnet, the atomic dipoles align themselves with

Perfect induction, Any identity or equality in Boolean algebra, suchas de M...

Any identity or equality in Boolean algebra, suchas de Morgan's Theorem can be proved usingthe method of perfect induction. 1. All combinations of variables are written down.

Karnaugh maps, Minimisation using Boolean algebra is not always straight fo...

Minimisation using Boolean algebra is not always straight forward and sometimes it is not obvious if a further manipulation would give a simpler circuit. Karnaugh maps are a muc

Show the memory hierarchy of computer system, Q. Show the Memory Hierarchy ...

Q. Show the Memory Hierarchy of computer system ? Memory in a computer system is essential for storage and subsequent retrieval of instructions and data. A computer system uses

Example of finding cross points and switches, For a non blocking crossbar c...

For a non blocking crossbar configuration, taking N as the number of subscribers, there will be               number of cross points and _             number of switches for est

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