What is the purpose of amplification in a receiver?

Amplification in a receiver is primarily aimed at enhancing weak signals. In the context of signal processing, amplification refers to increasing the strength of the signal received by the antenna or sensor, allowing it to be processed more effectively. Weak signals can often be lost in the noise, making them difficult to detect. By amplifying these signals, the receiver ensures that even the faintest transmissions can be detected and processed properly.

Amplification is a critical step in the overall capability of the receiver to provide clear and usable output. It directly impacts the ability to discern the desired information from background noise and interference, which is essential in various applications, including communications, radar, and other electronic systems. Thus, while detecting frequencies and producing signals are important functions of a receiver, the fundamental purpose of amplification is to make weak signals stronger and more manageable.