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Electronic Devices - Active Filters

Exercise : Active Filters - General Questions
21.
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
not enough information given
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Refer to this figure. Increasing the values of the filter section resistors in this circuit will cause the fc to

increase.
decrease.
remain the same.
increase and then decrease.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
One important application of a state-variable ________ filter with a summing amplifier is to minimize the 60 Hz "hum" in audio systems.
low-pass
high-pass
band-pass
band-stop
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Refer to the given figure. 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
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Refer to the given figure. RA = 2.2 k and RB = 1.2 k. This filter is probably a

Butterworth type.
Bessel type.
Chebyshev type.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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