19) Op-amp circuits that pass certain selected frequencies while rejecting signals outside this range are called
A) processors B) converters C) filters D) Amplifier
20) Filters are usually categorized by
A) response quality B) how the output reacts to changes in input frequency C) the ratio of input current to frequency D) the maximum output frequency
21) The range of frequencies that are not attenuated by a filter are referred to as the
A) band stop B) pass band C) low-pass frequency D) cutoff frequency
22) In general, the output from a passive low-pass filter is taken
A) across the filter capacitor B) across the filter resistor C) either depending on the phase of the input D) none of the above
23) In general, the output from a passive high-pass filter is taken
A) across the filter resistor B) across the filter capacitor C) either depending on the phase of the input D) none of the above
24) This circuit significantly attenuates all frequencies below the critical frequency and all frequencies above the critical frequency are passed
A) band-pass filter B) active filter C) low-pass filter D) high-pass filter
25) The critical frequency of the basic high-pass filter occurs when
A) Xc exceeds R B) XL = R C) XL = Xc D) Xc = R
26) This filter circuit passes all signals lying within a band between a lower-frequency limit and an upper-frequency limit
A) band-pass B) low-pass C) pass band D) high-pass
27) This is the ratio of the center frequency to the bandwidth of a band-pass filter
A) quality factor B) critical frequency C) frequency ratio D) Rejetion Ratio