1. The center frequency of a band-pass filter is always equal to the A. BandwidthB. 3 dB frequencyC. bandwidth divided by QD. geometric average of the critical frequencies2. The formula shows that for a given capacitor if the voltage changes at a constant rate with respect to time the current will A. !ncreaseB. "ecreaseC. be constantD. decrease logarithmically3. # $ero-level detector is aA. comparator with a sine-wave outputB. comparator with a trip point referenced to $eroC. pea% detectorD. limiter&. # digital-to-analog converter is an application of the A. scaling adderB. voltage-to-current converterC. noninverting amplifierD. ad'ustable bandwidth circuit(. !f the value of resistor Rf in an averaging amplifier circuit is equal to the value of one input resistor divided by the number of inputs the output will be equal to A. the average of the individual inputsB. the inverted sum of the individual inputsC. the sum of the individual inputsD. the inverted average of the individual inputs). !f the input to a comparator is a sine wave the output is a A. ramp voltageB. sine waveC. rectangular waveD. sawtooth wave*. # basic series regulator has A. an error detectorB. a loadC. a reference voltageD. both an error detector and a reference voltage+. # comparator is an e,ample of a-n. A. active filterB. current sourceC. linear circuitD. nonlinear circuit/. !nitially the closed-loop gain -Acl. of a 0ien-bridge oscillator should be A. Acl 1 3B. Acl 2 3C. 3D.Acl 113. !n an averaging amplifier the input resistances are A. equal to the feedbac% resistanceB. less than the feedbac% resistanceC. greater than the feedbac% resistanceD. unequal11. # triangular-wave oscillator can consist of an op-amp comparator followed by a-n. A. differentiator B. amplifierC. integrator D. multivibrator12. The ramp voltage at the output of an op-amp integrator -#45 #.A. increases or decreases at a linear rateB. increases or decreases e,ponentiallyC. is always increasing and never decreasingD. is constant13. # two-pole high-pass active filter would have a roll-off rate of A. &3 dB6decadeB. &3 dB6decadeC. 23 dB6decadeD. 23 dB6decade