BasicB-008-005-001
What is the frequency response of an ideal notch filter?
C
Answer
Safety
Type
A
Attenuate a range of frequencies and pass all others
B
Attenuate all frequencies except a range of frequencies
C
Attenuate one frequency and pass all others
D
Attenuate all frequencies except one single frequency
Answer Notes
A notch filter is designed to target and eliminate a very specific, narrow band of frequencies—ideally, just one single interfering frequency. It "notches out" this unwanted signal while allowing all other frequencies to pass through relatively unaffected.
This is the exact opposite of a band-pass filter, which allows only a specific range to pass while attenuating the rest. Notch filters are particularly useful in receivers for removing continuous wave (CW) interference or steady carrier tones without degrading the rest of the desired audio signal.
Previous · B-008-004-011
Harmonics may be produced in the RF power amplifier of a transmitter if:
Next · B-008-005-002
A filter attenuates frequencies below its cut-off frequency of 60 MHz. What type of filter is it?