Analog Integrated Circuits And Systems Quiz

20 Questions | Total Attempts: 209

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Analog Integrated Circuits And Systems Quiz - Quiz


Questions and Answers
  • 1. 
    When a differential amplifier is operated single-ended,…….
    • A. 

      The output is grounded

    • B. 

      One input is grounded and signal is applied to the other

    • C. 

      Both inputs are connected together

    • D. 

      The output is not inverted

  • 2. 
    In differential-mode, …………….
    • A. 

      Opposite polarity signals are applied to the inputs

    • B. 

      The gain is one

    • C. 

      The outputs are of different amplitudes

    • D. 

      Only one supply voltage is used

  • 3. 
    In the common mode,
    • A. 

      Both inputs are grounded

    • B. 

      The outputs are connected together

    • C. 

      An identical signal appears on both the inputs

    • D. 

      The output signal are in-phase

  • 4. 
    If ACM = 0.35 and ADM = 3500, the CMRR is
    • A. 

      80dB

    • B. 

      40dB

    • C. 

      20dB

    • D. 

      100dB

  • 5. 
    The slew rate of an op-amp whose output increases 8V in 12μs is
    • A. 

      90 V/μs

    • B. 

      0.67 V/μs

    • C. 

      1.5 V/μs

    • D. 

      None of these

  • 6. 
    For an Op-amp with negative feedback, the output is
    • A. 

      Equal to the input

    • B. 

      Increased

    • C. 

      Fed back to the inverting input

    • D. 

      Fed back to the non-inverting input

  • 7. 
    A certain inverting amplifier has a closed-loop voltage gain of 25. The Op-amp has an open-loop voltage gain of 100,000. If an Op-amp with an open-loop voltage gain of 200,000 is substituted in the arrangement, the closed-loop gain
    • A. 

      Doubles

    • B. 

      Drops to 12.5

    • C. 

      Remains at 25

    • D. 

      Increases slightly

  • 8. 
    The Op-amp can amplify
    • A. 

      A.c. signals only

    • B. 

      D.c. signals only

    • C. 

      Both a.c. and d.c. signals

    • D. 

      Neither d.c. nor a.c. signals

  • 9. 
    The current flowing through emitter resistance of a differential amplifier is …….
    • A. 

      Half of either collector current

    • B. 

      Equal to either collector current

    • C. 

      Two times either collector current

    • D. 

      Equal to the difference in base currents

  • 10. 
    An astable multivibrator is also known as a
    • A. 

      One-shot multivibrator

    • B. 

      Free-running multivibrator…

    • C. 

      Bistable multivibrator

    • D. 

      Monostable multivibrator

  • 11. 
    What starts a free-running multivibrator?
    • A. 

      An input signal

    • B. 

      A trigger

    • C. 

      An external circuit

    • D. 

      Nothing

  • 12. 
    What is the cutoff frequency of the low pass filter in the following circuit
    • A. 

      4.8 kHz

    • B. 

      3.8 kHz

    • C. 

      2.8 kHz

    • D. 

      1.8 kHz

  • 13. 
    What is the frequency of this 555 astable multivibrator?
    • A. 

      241 Hz

    • B. 

      178 Hz

    • C. 

      241 kHz

    • D. 

      178 kHz

  • 14. 
    If the input to a comparator is a sine wave, the output is a
    • A. 

      Ramp voltage

    • B. 

      Sine wave

    • C. 

      Rectangular wave

    • D. 

      Sawtooth wave

  • 15. 
    The Schmitt trigger is a two-state device used for
    • A. 

      Pulse shaping

    • B. 

      Peak detection

    • C. 

      Input noise rejection

    • D. 

      Filtering

  • 16. 
    A circuit that uses an amplifier with passive filter elements is called a/an:
    • A. 

      Relaxation oscillator

    • B. 

      Signal generator

    • C. 

      Active filter

    • D. 

      Differentiator

  • 17. 
    A low pass filter is one that passes all the frequencies from
    • A. 

      A fixed frequency to ∞

    • B. 

      0 to fixed higher frequency

    • C. 

      A fixed lower frequency to fixed higher frequency

    • D. 

      All frequencies

  • 18. 
    A high pass filter is one that passes all the frequencies from
    • A. 

      A fixed frequency to ∞

    • B. 

      0 to a fixed higher frequency

    • C. 

      A fixed lower frequency to fixed higher frequency

    • D. 

      All frequencies

  • 19. 
    A passive filter makes use of
    • A. 

      RC networks

    • B. 

      RLC networks

    • C. 

      LC networks

    • D. 

      All of the above

  • 20. 
    Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5 kΩ and C1 = 0.05 µF
    • A. 

      1.273 kHz

    • B. 

      12.73kHz

    • C. 

      127.3kHz

    • D. 

      1237 kHz.

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