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MCQs

Total Questions : 94 | Page 8 of 10 pages
Question 71. . In order to sustain oscillations in a feedback oscillator, the gain should be _________ so the Acl _______.
  1.    reduced, equals one
  2.    reduced, is less than one
  3.    increased, is more than one
  4.    increased, is much greater than one
 Discuss Question
Answer: Option A. -> reduced, equals one
Question 72. . A mathematical operation that determines the rate of change of a curve is called __________.
  1.    differentiation
  2.    integration
  3.    curve averaging
  4.    linear regression
 Discuss Question
Answer: Option A. -> differentiation
Question 73. . A Wien-bridge oscillator uses _________.
  1.    positive feedback
  2.    negative feedback
  3.    both types of feedback
  4.    an LC tank circuit
 Discuss Question
Answer: Option C. -> both types of feedback
Question 74. . In order to sustain oscillations in a feedback oscillator, the gain should be _________ so the Acl _______.
  1.    reduced, equals one
  2.    reduced, is less than one
  3.    increased, is more than one
  4.    increased, is much greater than one
 Discuss Question
Answer: Option A. -> reduced, equals one
Question 75. . A Wien-bridge oscillator uses _________.
  1.    positive feedback
  2.    negative feedback
  3.    both types of feedback
  4.    an LC tank circuit
 Discuss Question
Answer: Option C. -> both types of feedback
Question 76. . A mathematical operation that determines the rate of change of a curve is called __________.
  1.    differentiation
  2.    integration
  3.    curve averaging
  4.    linear regression
 Discuss Question
Answer: Option A. -> differentiation
Question 77.  When using an OTA in a Schmitt-trigger configuration, the trigger points are controlled by
  1.    the Iout
  2.    the IBIAS
  3.    the Vout
  4.    both Iout and IBIAS
 Discuss Question
Answer: Option D. -> both Iout and IBIAS
Question 78.  The primary function of the oscillator in an isolation amplifier is to
  1.    convert dc to high-frequency ac
  2.    convert dc to low-frequency ac
  3.    rectify high-frequency ac to dc
  4.    produce dual-polarity dc voltages for the input to the demodulator
 Discuss Question
Answer: Option A. -> convert dc to high-frequency ac
Question 79.  A Schmitt trigger has _________.
  1.    no trigger points
  2.    one trigger point
  3.    two trigger points
  4.    three trigger points
 Discuss Question
Answer: Option D. -> three trigger points
Question 80.  In the classic three-op-amp instrumentation amplifier, the differential voltage gain is usually produced by the
  1.    first stage
  2.    second stage
  3.    mismatched resistors
  4.    output op-amp
 Discuss Question
Answer: Option A. -> first stage

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