COMPUTER NETWORKING

Detailed explanation-1: -A PAM is generated from a pure sine wave modulating signal and a square wave generator which produces the carrier pulse and a PAM modulator circuit. A sine wave generator is used which is based on the Wien Bridge Oscillator circuit. This can produce distortion less sine wave at the output.

Detailed explanation-2: -In electronics, a sample and hold (also known as sample and follow) circuit is an analog device that samples (captures, takes) the voltage of a continuously varying analog signal and holds (locks, freezes) its value at a constant level for a specified minimum period of time.

Detailed explanation-3: -Pulse amplitude modulation (PAM) The actual amplitude of the pulse represents the number being transmitted. Hence, PAM is continuous in amplitude but discrete in time. The output of a sampling circuit with a zero-order hold (ZOH) is one example of a PAM signal.