The operational amplifiers are seldom used for differentiation because
- A. Of the problem of drift with differentiating circuits
- B. Because of the poor efficiency
- C. Because of the complex circuitry requirements
- D. The noises are amplified and this can be significant in the output.
Answer: D. The noises are amplified and this can be significant in the output.
Explanation: A differentiator has gain magnitude |H(jω)| = ωRC proportional to frequency, which excessively amplifies high-frequency noise and tends toward instability.