Question
How does the gain of an ideal operational amplifier vary with frequency?
Answer Options
- A) It increases linearly with increasing frequency
- B) It decreases linearly with increasing frequency
- C) It decreases logarithmically with increasing frequency
- D) It does not vary with frequency
Correct Answer: D
Explanation
An operational amplifier (\text{op-amp}) is designed to be a highly versatile, general-purpose voltage amplifier. For all applications, the ideal assumption is that the op-amp should amplify all input frequencies equally up to its maximum operational limit.
Therefore, for an ideal operational amplifier, the voltage gain does not vary with frequency within its specified bandwidth. The actual, non-ideal \text{op-amp} does exhibit a gain rolloff at high frequencies (as defined by its gain-bandwidth product), but for basic analysis and within its operating range, the assumption of flat frequency response is used.
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