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Electronics - Operational Amplifiers

Exercise : Operational Amplifiers - General Questions
31.
In an open-loop op-amp circuit, whenever the inverting input (–) is negative relative to the noninverting input (+), the output will:
swing negative
close the loop
be balanced
swing positive
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
With a differential gain of 50,000 and a common-mode gain of 2, what is the common-mode rejection ratio?
–87.9 dB
–43.9 dB
43.9 dB
87.9 dB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
If the input to a comparator is a sine wave, the output is a:
ramp voltage
sine wave
rectangular wave
sawtooth wave
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
What three subcircuits does a phase locked loop (PLL) consist of?
phase comparator, comparator, and VCO
phase comparator, bandpass filter, and VCO
phase comparator, bandpass filter, and demodulator
phase comparator, low-pass filter, and VCO
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
The major difference between ground and virtual ground is that virtual ground is only a:
voltage reference
current reference
power reference
difference reference
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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