© 2008 The McGraw-Hill Companies
9-1: Basic Principles of Signal Reproduction
A communication receiver’s sensitivity, or ability to pick up weak signals, is a function of overall gain, the factor by which an input signal is multiplied to produce the output signal.
The higher the gain of a receiver, the better its sensitivity.
The more gain that a receiver has, the smaller the input signal necessary to produce a desired level of output.
High gain in receivers is obtained by using multiple amplification stages.