Oscillators – Exercise – 2

81. Calculate the resonant frequency of this Wien bridge oscillator if R1 = 25 kΩ, R2 = 40 kΩ, C1 = 0.001 μF, and C2 = 0.002 μF.

(a) 1560.3 Hz
(b) 1779.4 Hz
(c) 3120.7 Hz
(d) 3558.8 Hz

Answer
Answer : (d)
Explanation
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82. Which of the following oscillators is (are) tuned oscillators?

(a) Colpitts
(b) Hartley
(c) Crystal
(d) All of the above

Answer
Answer : (d)
Explanation
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83. This circuit is a ________ oscillator.

(a) phase-shift
(b) Wien bridge
(c) Colpitts
(d) Hartley

Answer
Answer : (b)
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84. Nota

85. ________ is a frequency-determining component in a unijunction oscillator.

(a) Total resistance
(b) Total capacitance
(c) Intrinsic stand-off ratio
(d) All of the above

Answer
Answer : (d)
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