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Analog ElectronicsOperational Amplifiers

An op-amp has a gain-bandwidth product of 2 MHz. For a closed-loop gain magnitude of 20, the approximate bandwidth is?

  • A10 kHz
  • B100 kHz
  • C1 MHz
  • D40 MHz
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Correct Answer: B. 100 kHz
Explanation: For a dominant-pole op-amp, bandwidth ≈ GBW/gain = 2 MHz/20 = 100 kHz.
Reference: Standard analog electronics: operational amplifiers
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