Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Re: what is the exact difference between decoder and demulti
It will look very much like the decoder. I think only difference is:
In the Demux you select one of outputs and drive it by the input.
DEMUX(i, s[0:1], o[0:3]) -->
if (s=00) o = i;
if (s=01) o = i;
if (s=10) o = i;
if (s=11) o = i;
But in the decoder you activate one of outputs based on decoded inputs.
Decoder(s[0:1], o[0:3]) -->
if (s=00) o[0:3] = 1000;
if (s=01) o[0:3] = 0100;
if (s=10) o[0:3] = 0010;
if (s=11) o[0:3] = 0001;