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

## 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

## 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:-