The filter order of a Butterworth lowpass filter determines whether it is a very sharp or extremely smooth filter function, or an intermediate filter function. Which of the following filters does the filter approach if the parameter value is very high?
A. Gaussian lowpass filter
B. Ideal lowpass filter
C. Gaussian & Ideal lowpass filters
D. None of the mentioned
Answer:B
The filter order of a Butterworth lowpass filter determines whether it is a very sharp or extremely smooth filter function, or an intermediate filter function. Which of the following filters does the filter approach if the parameter value is very high?
A. Gaussian lowpass filter B. Ideal lowpass filter C. Gaussian & Ideal lowpass filters D. None of the mentioned
Explanation: Butterworth lowpass filter functions like an Ideal lowpass filter at high order values, but it has a smoother form at lower order values, behaving like a Gaussian lowpass filter.