Active Filters Quiz

The critical frequency is defined as the point at which the response drops _________ from the passband.

• -20 dB

• -3 dB

• -6 dB

• -40 dB

Which filter exhibits a linear phase characteristic?

• Bessel

• Butterworth

• Chebyshev

• all of the above

Which filter has a maximally flat response?

• Bessel

• Butterworth

• Chebyshev

• all of the above

Which filter exhibits the most rapid roll-off rate?

• Bessel

• Butterworth

• Chebyshev

• all of the above

A third-order filter will have a roll-off rate of

• -20 dB/decade.

• -40 dB/decade.

• -60 dB/decade.

• -30 dB/decade.

Refer to the figure below. Identify the frequency response curve for a band-reject filter.

• a

• b

• c

• d

Refer to the figure below. Identify the frequency response curve for a low-pass filter.

• a

• b

• c

• d

Refer to the figure below. Identify the frequency response curve for a high-pass filter.

• a

• b

• c

• d

Refer to the figure below. Identify the frequency response curve for a band-pass filter.

• a

• b

• c

• d

Refer to the figure below. This is a _____ filter, and it has a cutoff frequency of _____.

• high-pass, 21 Hz

• low-pass, 21 Hz

• high-pass, 2.65 kHz

• low-pass, 2.65 kHz