Advanced Qualification · A-002 Advanced components and circuits · A-002-012-002
What are the distinguishing features of a Butterworth filter?
- A It has a maximally flat response over its pass-band
- B The product of its series and shunt-element impedances is a constant for all frequencies
- C It only requires conductors
- D It only requires capacitors
Correct answer: A — It has a maximally flat response over its pass-band. From the official ISED question bank, verified word for word.
Why
A Butterworth filter is designed so that the signal strength stays perfectly even across the frequencies it lets through, without any bumps or dips in the middle. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.