Amplification is the process by which the magnitudes of the variable quantity is increasing, especially the magnitude of voltage, current or power, without changing any other quantity.
Gain voltage; is the measurement of amplifier’s voltage, ratio of the input to output voltage.
-Voltage gain, in voltage (v), is defined as follows.
Gain = v output/v input
Voltage gain, in decibels (dB), is defined as follows. Gain = 20log (v out/v in) dB