Gain

Gain

The term Gain can be defined as the ratio of output to input voltage (voltage gain), current (current gain) or electric power (power gain). Gain is a unit of measurement i.e. the ratio of a signal output of a system to the signal input of the system. Gain is a term associated with amplifiers. It is expressed using the logarithmic decibel (dB) units (dB gain).

Gain is a proportion of the capacity of a two-port circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal.

Power Gain

where , P denotes Power.

Voltage Gain

where, V denotes Voltage,

R denotes Impedance .

Current Gain

where, I denotes Current,

R denotes Impedance.

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