The field of electronics can be broadly classified into two groups, viz. analog electronics
and digital electronics. Analog electronics deals with matters which are continuous in nature
and digital electronics deals with systems which are discrete in nature. But they are much
inter-linked. For example, if we consider a bucket of water then it is analog in terms of the
content i.e., water but it is discrete in terms of the container, i.e., bucket. Now though in
nature most of the things are analog, still we very often require digital concepts. It is because
it has some specific advantages over analog, which we will discuss in due course of time.