Elevator Mechanic Practice Exam

A non-inverting amplifier is characterized by having the input signal applied to the non-inverting terminal, which is often referred to as the positive input. This configuration allows the output signal to be in phase with the input signal, providing a gain that is determined by the feedback network connected to the amplifier.

The significance of applying the input to the positive terminal is that it preserves the phase relationship between the input and output, meaning that when the input signal rises, the output signal also rises simultaneously. This is a fundamental trait of non-inverting amplifiers, distinguishing them from inverting amplifiers, where the input is connected to the inverting terminal and the output shifts 180 degrees out of phase.

In summary, the essential characteristic of a non-inverting amplifier is that the input is supplied to the positive terminal, allowing for a direct gain without phase inversion.