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#1
11-10-2010, 07:27 AM
 Ranjita ningthoujam New Member Join Date: Nov 2010 Posts: 1
construct a 3-8 decoder using a 2-4 decoder

I want to know how to construct a 3-8 decoder using a 2-4 decoder
#2
11-10-2010, 10:14 AM
 bertus Administrator Join Date: Apr 2008 Location: Amsterdam,Holland (GMT + 1) Posts: 12,288

Hello,

I moved your post from the other thread, as it is an other question.

Bertus
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#3
11-10-2010, 12:12 PM
 Kermit2 Senior Member Join Date: Feb 2010 Posts: 2,422

Look here

http://www.play-hookey.com/digital/d...emux_four.html

That show the simple arrangement of a 2 to 4 bit. By adding a third input stage and four more AND gates you get the 3 to 8 bit. Hint: some of the AND gates will now require 4 inputs max.

Can you show the truth tables for a 2 to 4 and a 3 to 8?
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#4
11-11-2010, 02:17 AM
 shteii01 Senior Member Join Date: Feb 2010 Location: Indiana, USA Posts: 1,707

 Tags construct, decoder

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