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| 1 | Active filters are built with resistors, capacitors, and op amps. |
 | A) | True |
| B) | False |
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| 2 | A high-pass filter passes all frequencies from zero to the cutoff frequency and blocks all frequencies above the cutoff frequency. |
| A) | True |
| B) | False |
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| 3 | The bandpass filter is sometimes called a notch filter because it removes all frequencies in the stopband. |
| A) | True |
| B) | False |
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| 4 | The order of an active filter depends on the number of RC circuits it contains. |
| A) | True |
| B) | False |
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| 5 | Monotonic means that the stopband has ripples. |
| A) | True |
| B) | False |
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| 6 | An LC filter has an order of four because it contains two reactive components, an inductor and a capacitor. |
| A) | True |
| B) | False |
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| 7 | If the damping factor is decreased, the resonant peak increases. |
| A) | True |
| B) | False |
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| 8 | Cascading first and second order filters will result in higher-order filters. |
| A) | True |
| B) | False |
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| 9 | Ac power line hum cannot be removed by using a Sallen-Key second-order notch filter. |
| A) | True |
| B) | False |
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| 10 | A filter that shifts the phase of the output signal without changing the magnitude is the filter. |
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| 11 | Having voltage gain, center frequency, and bandwidth all independently tunable are a major advantage of the filter. |
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| 12 | The filter has high sensitivity but low complexity of design and operation. |
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| 13 | Filters built with resistors, capacitors, and inductors are referred to as . |
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| 14 | A filter that blocks all frequencies from zero up to the cutoff frequency and passes all frequencies above the cutoff frequency is the . |
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| 15 | If the Q of a bandpass filter is less than 1, it is called a filter. |
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| 16 | Attenuation is almost always expressed in . |
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| 17 | The filter produces the least distortion of digital signals. |
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| 18 | Why are some filters designed with a linear phase shift for the fundamental and all significant harmonics? |
| A) | to prevent oscillations |
| B) | to notch out certain frequencies |
| C) | to cutoff at a desired frequency |
| D) | to prevent distortion of digital signals |
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| 19 | Which filter is configured as a voltage-controlled voltage source filter? |
| A) | Sallen-Key |
| B) | Multiple-feedback |
| C) | Biquadratic |
| D) | State-variable |
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| 20 | The graph of a filter’s voltage gain versus its frequency is the filter’s |
| A) | amplification factor |
| B) | overall gain |
| C) | frequency response |
| D) | passband |
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| 21 | A filter that has a passband and no stopband is the |
| A) | high-pass |
| B) | bandpass |
| C) | bandstop |
| D) | all-pass |
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| 22 | Which filter has the fastest possible roll-off in the transition region, but has a rippled passband and a rippled stopband? |
| A) | Butterworth |
| B) | Chebyshev |
| C) | Bessel |
| D) | elliptic |
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| 23 | As a filter circuit’s damping factor is increased, what happens to the resonant peak? |
| A) | increases |
| B) | decreases |
| C) | remains unchanged |
| D) | becomes distorted |
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| 24 | With regard to filter performance, limited gain-bandwidth product of an op amp |
| A) | increases the Q of a stage |
| B) | decreases the Q of a stage |
| C) | causes distortion |
| D) | reduces distortion |
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| 25 | When filter stages are cascaded, how is the total decibel attenuation calculated? |
| A) | decibel sum of each stage |
| B) | decibel difference of each stage |
| C) | multiply decibels of each stage |
| D) | average decibel total |