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Electronic Devices - Oscillator Circuits

Exercise : Oscillator Circuits - General Questions
56.
In the Wien bridge oscillator, which of the following is (are) frequency-determining components?
R1 and R2
C1 and C2
R1, R2, C1, and C2
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
57.
Determine the input impedance with feedback for a voltage-series feedback having A = –100, R1 = 15 k, Ro = 20 k, and a feedback of = –0.25.
110 k
290 k
390 k
510 k
Answer: Option
Explanation:
No answer description is available. Let's discuss.
58.
A certain oscillator has a tap on the inductor in the tank circuit. This oscillator is probably
a Colpitts oscillator.
a Clapp oscillator.
a crystal oscillator.
a Hartley oscillator.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
59.
At parallel resonance, the impedance of a crystal is
minimum.
maximum.
equal.
zero.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
60.

Refer to this figure. Assuming it is configured as an oscillator and if you desired to reduce the duty to less than 50%, the following circuit change would need to be made.

Reduce the size of R1.
Reduce the size of R2.
Increase the size of R1.
Connect a diode in parallel with R1.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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