Discussion
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- Question
What three subcircuits does a phase locked loop (PLL) consist of?
Options- A. phase comparator, comparator, and VCO
- B. phase comparator, bandpass filter, and VCO
- C. phase comparator, bandpass filter, and demodulator
- D. phase comparator, low-pass filter, and VCO
- Correct Answer
- phase comparator, low-pass filter, and VCO
- 1. In order for an output to swing above and below a zero reference, the op-amp circuit requires:
Options- A. a resistive feedback network
- B. zero offset
- C. a wide bandwidth
- D. a negative and positive supply Discuss
- 2. Another name for a unity gain amplifier is:
Options- A. difference amplifier
- B. comparator
- C. single ended
- D. voltage follower Discuss
- 3. If an op-amp has one input grounded and the other input has a signal feed to it, then it is operating as what?
Options- A. Common-mode
- B. Single-ended
- C. Double-ended
- D. Noninverting mode Discuss
- 4. The common-mode voltage gain is
Options- A. smaller than differential voltage gain
- B. equal to voltage gain
- C. greater than differential voltage gain
- D. None of the above Discuss
- 5. In a PLL, to obtain lock, the signal frequency must:
Options- A. come within the lock range
- B. be less than the capture frequency
- C. come within the capture range
- D. be greater than the capture frequency Discuss
- 6. A noninverting closed-loop op-amp circuit generally has a gain factor:
Options- A. less than one
- B. greater than one
- C. of zero
- D. equal to one Discuss
- 7. The Schmitt trigger is a two-state device that is used for:
Options- A. pulse shaping
- B. peak detection
- C. input noise rejection
- D. filtering Discuss
- 8. An ideal operational amplifier has
Options- A. infinite output impedance
- B. zero input impedance
- C. infinite bandwidth
- D. All of the above Discuss
- 9. With negative feedback, the returning signal:
Options- A. aids the input signal
- B. is proportional to output current
- C. opposes the input signal
- D. is proportional to differential voltage gain Discuss
- 10. An ideal amplifier should have:
Options- A. high input current
- B. zero offset
- C. high output impedance
- D. moderate gain Discuss
Operational Amplifiers problems
Search Results
Correct Answer: a negative and positive supply
Correct Answer: voltage follower
Correct Answer: Single-ended
Correct Answer: smaller than differential voltage gain
Correct Answer: come within the capture range
Correct Answer: greater than one
Correct Answer: pulse shaping
Correct Answer: infinite bandwidth
Correct Answer: opposes the input signal
Correct Answer: zero offset
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