Topic: Control Systems
The transfer function, T(s) = s / (s + a) is that of a
- A. Low-pass filter
- B. Notch filter
- C. High-pass filter
- D. Band-pass filter
Answer: C. High-pass filter
Explanation: Substituting s = jw, the magnitude is |T(jw)| = w / $\sqrt{w² + a²}$. At w = 0, gain is 0. At w approaching infinity, gain approaches 1. This characteristic represents a high-pass filter.