Operational Amplifiers 1 Questions and Answers

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Showing 10 of 36 questions
Q11
A portion of the output that provides circuit stabilization is considered to be:
  • A negative feedback
  • B distortion
  • C open-loop
  • D positive feedback
Answer: Option A
Q12
How many leads does the TO-5 metal can package of an operational amplifier have?
  • A 8, 10, or 12
  • B 6, 8, or 10
  • C 8 or 14
  • D 8 or 16
Answer: Option A
Q13
If a noninverting amplifier has an RIN of 1000 ohms and an RFB of 2.5 kilohms, what is the RIN voltage when 1.42 mV is applied to the correct input?
  • A 3.5 mV
  • B ground
  • C 1.42 mV
  • D 0.56 mV
Answer: Option C
Q14
The closed-loop voltage gain of an inverting amplifier equals:
  • A the ratio of the input resistance to the feedback resistance
  • B the open-loop voltage gain
  • C the feedback resistance divided by the input resistance
  • D the input resistance
Answer: Option C
Q15
All of the following are basic op-amp input modes of operation EXCEPT
  • A inverting mode
  • B common-mode
  • C double-ended
  • D single-ended
Answer: Option A
Q16
A circuit whose output is proportional to the difference between the input signals is considered to be which type of amplifier? A.     common-mode    B.     darlington
  • A differential
  • B operational
Answer: Option A
Q17
With negative feedback, the returning signal
  • A is proportional to the output current
  • B is proportional to the differential voltage gain
  • C opposes the input signal
  • D aids the input signal
Answer: Option C
Q18
The voltage follower has a:
  • A closed-loop voltage gain of unity
  • B small open-loop voltage gain
  • C closed-loop bandwidth of zero
  • D large closed-loop output impedance
Answer: Option A
Q19
The ratio between differential gain and common-mode gain is called:
  • A amplitude
  • B differential-mode rejection
  • C common-mode rejection
  • D phase
Answer: Option C
Q20
If the gain of a closed-loop inverting amplifier is 3.9, with an input resistor value of 1.6 kilohms, what value of feedback resistor is necessary?
  • A 6240 ohms
  • B 2.4 kilohms
  • C 410 ohms
  • D 0.62 kilohms
Answer: Option A

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