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Electronic Devices & Circuits Operational Amplifiers

An op-amp has a gain-bandwidth product of 1 MHz. If configured for a closed-loop gain magnitude of 10, its approximate small-signal bandwidth is?

A10 kHz
B100 kHz
C1 MHz
D10 MHz

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Correct Answer: B. 100 kHz

Explanation: For a single-pole op-amp, bandwidth ≈ GBW/closed-loop gain = 1 MHz/10 = 100 kHz.

Reference: Standard analog electronics: gain-bandwidth calculation

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