Question

the frequency at which the open-loop gain is equal to 1 is called
select one:
○ a. the upper critical frequency
○ b. the notch frequency
○ c. the cutoff frequency
○ d. unity-gain frequency

Explanation:

The unity-gain frequency is defined as the frequency where an amplifier's open-loop gain equals 1. The upper critical/cutoff frequency refers to where gain drops by 3dB, and notch frequency is where gain is minimized (not 1), so these do not match the given definition.

Answer:

d. unity-gain frequency