# Difference between Analog Circuit & Digital Circuit

Last Updated on August 8, 2022 by Electricalvolt

In this article, we will discuss the differences between analog circuits & digital circuits. The analog and digital circuits are the basic building block of electronic circuits.

An arrangement of circuit components such as resistors, inductors, capacitors, energy sources, etc. which provides a closed loop for the flow of electric current is known as a circuit or electric circuit.

The excitation in any electrical or electronic circuit is provided by an electric signal, i.e. voltage or current. These electric signals may be of the following two types:

• Analog signals
• Digital signals

An analog signal is one whose magnitude is a continuous function of time, i.e. it varies instantaneously with time. On the other hand, a digital signal is one that is a discrete (or discontinuous) function of time, i.e. a digital signal exists on discrete instants of time.

Based on the type of signals, the electrical and electronic circuits are also classified into two types:

• Analog circuits
• Digital circuits

Now. we will discuss what an analog circuit and digital circuit are and the main differences between them.

## What is an Analog Circuit?

An analog circuit is the type of circuit that contains analog circuit elements like resistors, inductors, capacitors, diode, etc., and uses continuous time signal at the excitation and response.

In simple words, an electronic circuit that can process data in analog form is termed an analog circuit. The common examples of analog circuits are voltage dividers, amplifiers, rectifiers, etc.

## What is a Digital Circuit?

A type of circuit that has the ability to process digital data is known as a digital circuit. Therefore, the input and output of a digital circuit are in the form of discontinuous time signals.

The digitals are designed by the small electronic circuit components called logic gates. Where the logic gates are able to perform Boolean operations to process the data.

The digital circuits have only two states namely active high and active low, which means they do respond continuously to the input signal. Digital circuits are extensively used in modern electronic devices like computers, calculators, smartphones, power supplies, remote controls, etc.

## Difference between Analog and Digital Circuits

The key differences between analog circuits and digital circuits are described in the following table:

## Summary

We have discussed all the fundamental differences between analog circuits and digital circuits by considering various parameters. One major difference between the two circuits is that the analog circuit functions with continuous time functions, while the digital circuit functions with discontinuous time signals. 