Operational Amplifiers 3 Questions and Answers

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Q11
An IC unit made using both ________ and ________ transistors is called a ________ circuit.
  • A bipolar, MOSFET, BiFET
  • B bipolar, MOSFET, BiMOS
  • C TTL, MOSFET, TailFET
Answer: Option B
Q12
What is the slew rate of an op-amp if the output voltages change from 2 V to 3 V in 0.2 ms?
  • A 5 V/ms
  • B 3 V/ms
  • C 2 V/ms
  • D 1 V/ms
Answer: Option A
Q13
The maximum rate of change of the output voltage in response to a step input voltage is the ________ of an op-amp.
  • A time constant
  • B maximum frequency
  • C slew rate
  • D static discharge
Answer: Option C
Q14
At what input voltage level does the output voltage level become numerically equal to the value of the differential gain of the amplifier?
  • A Vi1 = –Vi2 = 0.25 V
  • B V i1 = –V i2 = 0.50 V
  • C V i1 = –V i2 = 0.75 V
  • D V i1 = –Vi2 = 1.00 V
Answer: Option B
Q15
A practical op-amp has very ________ input impedance, very ________ output impedance, very ________ open-loop voltage gain, and a ________ bandwidth.
  • A high, low, high, wide
  • B high, high, low, narrow
  • C low, high, high, wide
  • D low, low, low, wide
Answer: Option A
Q16
What is the level of the roll-off in most op-amps?
  • A –6 dB / decade
  • B –20 dB / octave
  • C –6 dB / decade or –20 dB / octave
  • D –20 dB / decade or –6 dB / octave
Answer: Option D
Q17
The input offset voltage drift is a parameter directly related to VOS and ________.
  • A ID
  • B power dissipation
  • C temperature
  • D phase shift
Answer: Option C
Q18
What is the difference voltage if the inputs are an ideal opposite signal?
  • A The differential gain times twice the input signal.
  • B The differential gain times the input signal.
  • C The common-mode gain times twice the input signal.
  • D The common-mode gain times the input signal.
Answer: Option A
Q19
Which of the following circuit conditions affect(s) the output offset voltage of an op-amp?
  • A An input offset voltage, VIO
  • B An input offset current, IIO
  • C Both an input offset voltage, VIO and an input offset current, IIO
  • D None of the above
Answer: Option C
Q20
A(n) ________ amplifier configuration has a higher input impedance and a lower output impedance than the op-amp itself.
  • A non-inverting
  • B inverting
  • C voltage-follower
  • D [NIL]
Answer: Option A

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