I want to know how to construct a 3-8 decoder using a 2-4 decoder
R Thread Starter Ranjita ningthoujam Joined Nov 10, 2010 1 Nov 10, 2010 #1 I want to know how to construct a 3-8 decoder using a 2-4 decoder
bertus Joined Apr 5, 2008 22,270 Nov 10, 2010 #2 Hello, I moved your post from the other thread, as it is an other question. Now you have your own thread. Bertus
Hello, I moved your post from the other thread, as it is an other question. Now you have your own thread. Bertus
Kermit2 Joined Feb 5, 2010 4,162 Nov 10, 2010 #3 Look here http://www.play-hookey.com/digital/decoder_demux_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?
Look here http://www.play-hookey.com/digital/decoder_demux_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?
shteii01 Joined Feb 19, 2010 4,644 Nov 10, 2010 #4 http://www.doc.ic.ac.uk/~dfg/hardware/SourceFiles/HardwareLecture12.doc