Bandstop filter

1. What does a band stop filter do?
2. What is bandpass and Bandstop?
3. What is the difference between band-stop and notch filter?
4. How do you make a Bandstop filter?

What does a band stop filter do?

A Band Stop Filter, also sometimes called a notch or band reject filter allows a specific range of frequencies to not pass to the output, while allowing lower and higher frequencies to pass with little attenuation.

What is bandpass and Bandstop?

A band-pass filter admits frequencies within a given band, rejecting frequencies below it and above it. Figure 8.3 shows the frequency response of a band-pass filter, with the key parameters labelled. A stop-band filter does the reverse, rejecting frequencies within the band and letting through frequencies outside it.

What is the difference between band-stop and notch filter?

A notch filter is a type of band-stop filter, which is a filter that attenuates frequencies within a specific range while passing all other frequencies unaltered. For a notch filter, this range of frequencies is very narrow. The range of frequencies that a band-stop filter attenuates is called the stopband.

How do you make a Bandstop filter?

Band-stop filters can be made by placing a low-pass filter in parallel with a high-pass filter. Commonly, both the low-pass and high-pass filter sections are of the “T” configuration, giving the name “Twin-T” to the band-stop combination. The frequency of maximum attenuation is called the notch frequency.