Resources
Gain
1. Ratio of output signal magnitude to input signal magnitude; when less than one this is usually called attenuation. 2. The relative degree of amplification in an electronic circuit. 3. The ratio of the change in output to the change in input which caused the change. 4. In a controller, the reciprocal of proportional band Proportional band can be expressed as a dimensionless number (gain) or as a percent.