How is Slew Rate defined in the context of amplifiers?

Slew rate is a critical parameter for amplifiers, defined as the speed at which an amplifier can respond to changes in input voltage. It indicates how quickly the output can change in reaction to a rapidly changing input signal, typically expressed in volts per microsecond (V/μs). A high slew rate means that the amplifier can accurately reproduce fast transients and dynamic signals without distortion, which is particularly important in applications requiring high fidelity audio or precise signal replication.

In contrast, the other options do not fully capture this definition. The rate of input sensitivity pertains more to how well an amplifier can respond to varying levels of input rather than the speed of response to a change. The speed of power output could suggest how fast power is delivered but does not specifically address the amplifier's reaction to changes in input signal. Frequency response speed relates to the range of frequencies an amplifier can effectively process but does not directly indicate how quickly it can follow input changes. Thus, the correct definition of slew rate focuses on the amplifier's ability to quickly respond to variations in the signal.