The increase in signal magnitude by a differential amplifier is referred to as?

The increase in signal magnitude by a differential amplifier is referred to as sensitivity. Sensitivity is a crucial parameter that quantifies how effectively an amplifier can respond to changes in the input signal. It defines the relationship between the input signal and the output signal, typically expressed as a ratio of output change to input change. In the context of differential amplifiers, a higher sensitivity indicates that even small differences between the input signals can produce a significant output, making the amplifier more effective for applications in which detecting small voltage differences is essential, such as in medical instrumentation or precision measurement systems.

In the context of the other terms, resistance refers to the opposition that a circuit presents to the flow of electric current, filter pertains to the ability of a circuit to pass certain frequencies while attenuating others, and input impedance is the measure of the resistance seen by the input signal. While each of these concepts is relevant in the broader framework of amplifier design and function, they do not pertain directly to the increase in signal magnitude in the same manner that sensitivity does.