Showing posts with label MUX. Show all posts
Showing posts with label MUX. Show all posts

Tuesday, 11 December 2012

Bus Implementation by using Mux and Instate Buffer


Bus can be implemented through Mux and instate buffer.Firstly I discuss Bus Implementation by using Mux.

Table:-



S(1) S(0) Register
0 0 Reg A
0 1 Reg B
1 0 Reg C
1 1 Reg D

Point to remember:-

                                       
                     No. of Mux=No. of Register    
                     Size of Mux=No. of Register 



In above diagram we using 4 mux and 4 
register(reg1,reg2,reg3,reg4).

Bus Implementation using Instate buffer:-


Table:-



S(1) S(0) D(0) D(1) D(2) D(3)
0 0 1 0 0 0
0 1 0 1 0 0
1 0 0 0 1 0
1 1 0 0 0 1






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Saturday, 1 December 2012

Building Blocks of Computer:Multiplexer


Multiplexer is a circuit that produce one output from many inputs or in simple words Many to One.Multiplexer(MUX) is also called a Data Selector(because in this circuit the output units are depend on input unit).



Now I discuss the example of MUX,

1)2:1 MUX or 2 to 1 MUX


Functional Table:-



S(0) y(var.)
0 I(0)
1 I(1)

Logic Circuit:-





2)4:1 MUX or 4 to 1 MUX


Functional Table:-



S(0) S(1) S(2)
0 0 I(0)
0 1 I(1)
1 0 I(2)
1 1 I(3)

Logic Circuit:-




3)8:1 MUX or 8 to 1 MUX

Functional Table:-


S(2) S(1) S(0) y(var.)
0 0 0 I(0)
0 0 1 I(1)
0 1 0 I(2)
0 1 1 I(3)
1 0 0 I(4)
1 0 1 I(5)
1 1 0 I(6)
1 1 1 I(7)

Logic Circuit:-





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