Active Filters Questions and Answers
Active Filters questions with answers are a crucial topic in electronics, particularly for GATE, ECE, and PSU aspirants. These questions test understanding of filter design, frequency response, and operational amplifier applications. Practicing programming questions and answers related to Active Filters helps in mastering the theoretical and practical aspects of circuit behavior. This section provides well-structured questions with detailed solutions to strengthen your grasp of analog and digital filtering concepts for exams and interviews.
Active Filters
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26 questions
11. The critical frequency is defined as the point at which the response drops ________ from the passband.
- –20 dB
- –3 dB
- –6 dB
- –40 dB
12. Filters with the ________ characteristic provide a very flat amplitude in the passband and a roll-off rate of –20 dB/decade/pole.
- Butterworth
- Chebyshev
- Bessel
- [NIL]
13. Which filter exhibits the most rapid roll-off rate?
- Bessel
- Butterworth
- Chebyshev
- all of the above
14. Which filter has a maximally flat response?
- Bessel
- Butterworth
- Chebyshev
- all of the above
15. A low-pass filter has a cutoff frequency of 1.23 kHz. Determine the bandwidth of the filter.
- 2.46 kHz
- 1.23 kHz
- 644 Hz
- 644 Hz
16. A third-order filter will have a roll-off rate of
- –20 dB/decade.
- –40 dB/decade.
- –60 dB/decade.
- –30 dB/decade.
17. A ________ filter passes all frequencies within a band between a lower and an upper critical frequency and rejects all others outside this band.
- low-pass
- high-pass
- band-pass
- band-stop
18. A band-pass filter can be created by cascading a high-pass filter and a low-pass filter.
- TRUE
- FALSE
19. The bandwidth of a band-pass filter is the sum of the two cutoff frequencies.
- TRUE
- FALSE