# Difference between AM vs FM

The basic difference between AM vs FM is based on the modulation technique, which is used for modulation. In Amplitude Modulation (AM) the modulation is based on the amplitude of the message or information signal. In Frequency Modulation (FM) the modulation is based on the frequency of the message or information signal.

Table of Contents

## Amplitude modulation (AM)

Amplitude modulation (AM) is defined as system of modulation in which the instantaneous value of the carrier amplitude changes in accordance with the amplitude of the modulating signal.

## Frequency Modulation (FM)

When the frequency of the carrier varies as per amplitude variations of the modulating signal, then it is called Frequency Modulation (FM). The amplitude of the modulated carrier remains constant.

## AM vs FM – Difference and Comparison

The difference between AM vs FM is shown below in table form.