A 741-type OP-AMP has a gain-bandwidth product of 1MHz. A non-inverting amplifier using this op-amp & having a voltage gain of 20db will exhibit -3db bandwidth of__________?
Correct answer: B. 100KHz
- A. 50 KHz
- B. 100KHz
- C. 1000/17 KHz
- D. 1000/7.07 KHz
Explanation
A 20 dB voltage gain corresponds to a voltage gain of 10, since 20 log₁₀(A_v) = 20. Thus the bandwidth is approximately 1 MHz/10 = 100 kHz.
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