Howtosignalprocessing
What is a power amplifier used for?
A power amplifier (PA) converts a low-power signal to a higher power one. Two common examples are audio amplifiers, used to drive loudspeakers and headphones, and RF power amplifiers, such as those used in the final stage of a transmitter.
What is difference between power amplifier and normal amplifier?
An amplifier which is designed to increase the level of input signal is called a voltage amplifier. A type of amplifier which is designed to boost the power level of the input signal is called a power amplifier.
