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Electronic Devices - Oscillator Circuits

Exercise : Oscillator Circuits - General Questions
46.
The lead-lag circuit in the Wien-bridge oscillator has a resonant frequency at which the attenuation is
1/2.
1/4.
1/3.
1/5.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
The start-up gain of an oscillator must be ________ one.
equal to
less than
greater than
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.

Refer to this figure. What is the duty cycle, if any?

16.3%
54.5%
86.9%
none
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
In the IC phase-shift oscillator, what should the ratio of feedback resistor Rf to R1 be?
Zero
Greater than –29
Less than 29
Any value
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
At series resonance, the impedance of a crystal is
minimum.
maximum.
equal.
zero.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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