Opposite of a notch filter

A rejection filter, also known as a band-stop or stop-band filter is the opposite of a bandpass filter. It is a type of filter that rejects frequencies within the band and transmits frequencies outside of the band.
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Typical Rejection Optical Notch Filter Designs.

1. What are the different types of filter?
2. How is band-pass filter different from notch filter?
3. What is another name for a notch filter?
4. What is a band stop filter used for?

What are the different types of filter?

The four primary types of filters include the low-pass filter, the high-pass filter, the band-pass filter, and the notch filter (or the band-reject or band-stop filter).

How is band-pass filter different from notch filter?

The main difference between a bandpass and notch filter is that a bandpass filter allows signals within a particular frequency range to pass and a notch filter will filter those signals out in that one frequency range.

What is another name for a notch filter?

A Notch Filter is also known as a Band Stop filter or Band Reject Filter. These filters reject/attenuate signals in a specific frequency band called the stop band frequency range and pass the signals above and below this band.

What is a band stop filter used for?

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.