Design and Development of an Amplitude Modulator Using Square Law Approach

This paper discusses a simple, reliable and cheap way of achieving Amplitude Modulation (AM) using a square law method. Amplitude modulation is a technique used in electronic communication most commonly for transmitting information via a . This is achieved by varying the strength of the carrier signal in relation to the information being sent. Hence, the changes in the maximum and minimum values of carrier signal result to the varying modulating index at 0.5 ms/Div sweep on the Oscilloscope screen in which the respective waveforms were displayed ranging from 47.4% to 100% at 1 KHz and 200 KHz modulating and Carrier frequencies respectively.