Question

what is decoder and multiplexer?

Answer 1

decoder decodes encoded information
http://en.wikipedia.org/wiki/Decoder
allows to select from different inputs
http://en.wikipedia.org/wiki/Multiplexer

Answer 2

thank you

Answer 3

decoder with enable input called demultiplexer

Answer 4

In multiplexer,there is n-number of inputs but only single output,as in mobile communication we have thousands of inputs in our mobile set but we have only a single output,multiplexer is also called mux-, with n-number of inputs,single out put and data selectors etc

Answer 5

very good, thanks :)