Extra exam question E7G06
Subelement E7, PRACTICAL CIRCUITS· Group E7G
What is the gain-bandwidth of an operational amplifier?
- A.The maximum frequency for a filter circuit using that type of amplifier
- B.The frequency at which the open-loop gain of the amplifier equals one (correct answer)
- C.The gain of the amplifier at a filter’s cutoff frequency
- D.The frequency at which the amplifier’s offset voltage is zero
WhyAn operational amplifier's gain-bandwidth product is the frequency at which its open-loop gain equals one. An operational amplifier's gain-bandwidth product corresponds to the frequency at which its open-loop gain has dropped to exactly one (unity), a single figure that describes the tradeoff between gain and bandwidth for any given feedback configuration built around that op-amp, answer B. It isn't the maximum frequency of some specific filter circuit, isn't the gain at a filter's cutoff frequency specifically, and isn't related to where offset voltage happens to be zero, those aren't what gain-bandwidth product refers to.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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