**1. Introduction**

The field of electronics are classified into two broad group namely analog electronics and digital electronics. Analog electronics deals with signals that are continuous with respect to time by nature such as any noise signal, any video streaming etc. and digital electronics deals with signals that are discontinuous or discrete with respect to time. The electronic amplifier such as op-amp circuit helps to amplify the continuous signals and such signals are termed as *analog signals* and the circuit used for such applications are called *analog circuits.* On the other hand, the discrete signals are fed as the input to the computer by electronic switches, which as two distinct values such as HIGH level and LOW level [1]. This discrete signals are further converted in to electronic signals with the help of suitable converters. Such discrete signals are called as *digital signals* and the electronic circuit used for such operation are termed as *digital circuits.*
