Question
The bandwidth of a band-pass filter is measured between what two frequencies?
Answer Options
- A) Upper and lower half-power
- B) Cutoff and rolloff
- C) Pole and zero
- D) Image and harmonic
Correct Answer: A
Explanation
A band-pass filter is designed to pass a contiguous range of frequencies while rejecting all frequencies above and below that range. The bandwidth of the filter quantifies the width of this useful range.
The bandwidth is defined as the distance (in \text{Hz} or \text{kHz}) between the upper and lower half-power frequencies. The half-power points are the frequencies where the filter’s output power has dropped to half its maximum level (the 3 \text{ dB} down points). Measuring the distance between these two 3 \text{ dB} points gives the filter’s operational bandwidth.
This topic was automatically created to facilitate community discussion about this exam question. Feel free to share study tips, memory tricks, or additional explanations!