# Help with multiplexer

Discussion in 'Homework Help' started by arcsky, May 16, 2009.

1. ### arcsky Thread Starter Member

Apr 17, 2009
12
0
Hi all electronic gurus.
Today i want help with multiplexers.

Draw logic diagram for a multiplex, which has input signal A and B, and control signal S. The output
bait included with U. multiplexes to be built with as few two-inputs NAND-gates
as possible. It shall apply to the output Y = A for S = 1 and Y = B for S = 0.

To a four-to-one (4:1) multiplex is input I3 I2 I1 I0 connected. Selection signals are S1
and S0, where S1 is the most significant bit. Enter the Boolean expression for output signal U, then
insignalena I3 I2 I1 I0 linked by:
I3 3, I2 to 2, I1 to 1, and I0 to 0.
Note:. Multiplex has inputs 3, 2, 1 and 0

Best regards Arcsky

2. ### mik3 Senior Member

Feb 4, 2008
4,846
63
Post your work up to now and we will help you to correct it if it is wrong.

3. ### arcsky Thread Starter Member

Apr 17, 2009
12
0
The problem is i dont understand how to solve it.

4. ### mik3 Senior Member

Feb 4, 2008
4,846
63
You have to try rather saying I don't understand.

5. ### arcsky Thread Starter Member

Apr 17, 2009
12
0
Task to i solved now, wasnt so hard.