Electronic Devices - Oscillator Circuits

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Exercise : Oscillator Circuits - General Questions
1.
Calculate the value of C1 = C2 for the Wien bridge oscillator to operate at a frequency of 20 kHz. Assume R1 = R2 = 50 k and R3 = 3R4 = 600?

1.59 pF
15.9 pF
159 pF
1.59 nF
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
Only the condition A = ________ must be satisfied for self-sustained oscillations to result.
0
–1
1
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
At what phase shift is the magnitude of A at its maximum in the Nyquist plot?
90º
180º
270º
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
Which of the following improvements is (are) a result of the negative feedback in a circuit?
Lower output impedance
Reduced noise
More linear operation
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
This circuit is a ________ oscillator.

phase-shift
Wien bridge
Colpitts
Hartley
Answer: Option
Explanation:
No answer description is available. Let's discuss.