Ideal operational amplifier properties (concept check): Which of the following is NOT a characteristic of an ideal op-amp?

Introduction / Context:
Ideal op-amp assumptions simplify circuit analysis: infinite open-loop gain, infinite input impedance, zero output impedance, and infinite bandwidth (among others). This question asks which listed attribute does not belong to the idealized set and therefore must be rejected.

Given Data / Assumptions:

• Ideal op-amp model used in linear circuit analysis.
• Open-loop gain A → ∞, input currents ≈ 0, output behaves like an ideal voltage source within limits.
• Bandwidth considered unbounded for the purpose of the ideal model.

Concept / Approach:
The idealized op-amp has infinite bandwidth, not “minimum bandwidth.” Infinite bandwidth implies constant gain with zero phase shift for all frequencies of interest. Therefore, among the choices, “Minimum bandwidth” is the property that is NOT consistent with the ideal model and is the correct answer to select as not a characteristic.

Step-by-Step Solution:

Verification / Alternative check:
Any op-amp textbook summarizes the ideal model with infinite bandwidth; the opposite notion of “minimum bandwidth” contradicts that definition.

Why Other Options Are Wrong:
Infinite voltage gain, infinite input impedance, and zero output impedance are all canonical ideal op-amp traits.

Common Pitfalls:
Confusing ideal traits with real op-amp limitations (finite GBW, slew rate, output swing). The question explicitly targets the idealized model.

Final Answer:
Minimum bandwidth