Illustrate function of 4-input multiplexer using basic gates, Computer Engineering

Illustrate functional diagram of digital multiplexer. Write the scheme of a 4- input multiplexer using basic gates (AND/OR/NOT) and explain its operation.


Multiplexer: Data selector or MUX is a logic circuit selects binary information from one of several input and directs this to a single output line. Selection of the individual input line is controlled through a set of selection lines. Generally there are 2n input lines and respectively n selection lines.

Here 4 inputs that are I1 I0 I2 I3 and two selection line as S0 and S1. Depending on the bit combination of S0 and S1 one of the inputs is moved to the output. Fundamentally there is a decoder circuit along with one input for each bit of information and one OR gate linked to the output. If So, Si = 00, then first AND gate will contain the two inputs as one output will depend upon I0. At similar time outputs of all other AND gates are Zero.

The multiplexer is a combinational circuit that is individual most broadly utilized standard circuit in digital design. This has N select lines 2N inputs and a particular output.


Y = S‾1S‾0 I0 + S‾1S0 I1 + S1S‾0I2  + S1S0 I3

Truth table of 4x1 Mux

Select inputs

















1121_Circuit Diagram of 4 X 1 MUX using basic gate.png

Circuit Diagram of 4 X 1 MUX using basic gate

Posted Date: 5/4/2013 5:36:11 AM | Location : United States

Your posts are moderated
Related Questions
Problem (a) Distinguish between how NTFS and FAT store time. Describe your answer. (b) Unix epoch starts as from January 1, 1970, 00:00:00 GMT. Provide that Unix stores

Q. F' (A, B, C, D) = (A + B + D')(A + C' + D')(A + B' + C')        D' (A, B, C, D) = (A + B' + C + D')(A' + C' + D')(A' + B + D)        Find the simplified function F and imple

Describe the term- Macros A macro is a key or name which signifies a series of commands or key strokes. Many applications allow single nominated key or single word on a keyboar

Illustrate the role of World Wide Web into the field of e-commerce. In the 1990 year, the advent of the World Wide Web upon the Internet represented a turning point into e-com

The following are the difference among Activity and Sequence Diagrams: A sequence diagram represents the way of processes implement in a sequence. For example, the order of op

Write down different system calls for performing different kinds of tasks. The major types of system calls are given as: Process Control: These kinds of system calls are

Q. Signed 1s complement representation? Another possibility that is also simple is use of signed 1's complement. Signed 1's complement has a principal. Add both numbers includi

Q. What is Small Computer Systems Interface? The other well-liked way is to connect a disk drive to a PC by a SCSI interface. Common drive choice for high-end workstations or s

Q. Illustrate Master-Slave Flip-Flop? Master slave flip-flop comprise two flip-flops. One is master flip-flop and other one is known as slave flip-flop. Fig below shows impleme

mod12 counter connection diagram