Ansys Employee
Amplifier can only boost the power level of the input signal which is defined as its gain. The input to the repeater is not a pure signal but it is embedded with some noise. The amplifier cannot differentiate the noise from the input signal and will boost up all the signals fed into it which results in the decrease of signal to noise ratio whereas the repeater will regenerate the original signal by eliminating the noise and then amplifies it before transmitting. Repeaters will use amplifiers in their design along with other components to re transmit the received signal.