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Difference between Analog Electronics and Digital Electronics


Electronics is the branch of engineering which deals with the study of devices that function due to the movement of electrons. Based on types of signals used and voltage or current or power ratings, the electronics can be broadly classified into following categories viz.

Analog Electronics

Digital Electronics

Power Electronics

In this post, we will take a close look at analog electronics and digital electronics and the major differences between them by considering various parameters like definition, type of signal used, current voltage rating, applications, etc.

What is Analog Electronics?

Analog electronics is the branch of electronics that deals with the electronic systems and devices with the continuous time signals. The term ‘analog or analogue’ describes a proportional relationship between a signal and an electrical quantity (voltage or current) that represents the signal.

Basically, the term ‘analogue’ is a Greek word whose meaning is ‘proportional’. The analog electronics is extensively used in many electronic applications where the signals are derived from analog sensors such as in FM radios, TVs, telephones, etc. However, the analog electronics is more susceptible for noise and distortion.

In analog electronics, two types of components are used to design the systems which are: the active elements such as diode, transistors, etc. and the passive elements such as resistors, capacitors, inductors, etc.

What is Digital Electronics?

The field of electronics engineering which involves the study of electronic systems that uses digital signals or discrete time signals is called digital electronics.

Digital electronics systems are usually made from a combination of logic gates, often packaged in an integrated circuit (IC). The digital electronics uses binary logic function to perform operations, the basic mean of binary logic function is that it has only two states ‘active high’ and ‘active low’.

Digital electronics uses active components only. One of the most common application of digital electronics is in computers.

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