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What does a band stop filter do?
In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels. It is the opposite of a band-pass filter.
How many types of band stop filters are present?
They are classified into two types. ii) Narrow band-reject filter. 2. Find the wide band-reject filter.
Which device did we use for AM demodulation?
diode detector
The most basic equipment used for AM demodulation is a diode detector. A diode detector is made up of a diode and a few other parts.
How is a band stop filter set up?
The band stop filter blocks signals falling within a certain frequency band set up between two points while allowing both the lower and higher frequencies either side of this frequency band. It is formed by the combination of low pass and high pass filters with a parallel connection instead of cascading connection.
Where do low and high frequencies go in a band stop circuit?
When the input signal is given, the low frequencies are passed through the low pass filter in the band stop circuit and the high frequencies are passed through the high pass filter in the circuit. This is shown in below block diagram.
What is the frequency response of a stop filter?
Such a filter attenuates the electric signal over a specified frequency range from f L to f H and below f L and above f H has all pass band region. The R-C band stop filter frequency response curve is shown in fig. below. The stop band is represented by the group of frequencies that lies between f L and f H where response is below -60 dB.
What is the name of the band reject filter?
It is formed by the combination of low pass and high pass filters with a parallel connection instead of cascading connection. Since it eliminates frequencies, it is also called as band elimination filter or band reject filter or notch filter.