Oscillator Circuits - General Questions Online Exam Quiz
Oscillator Circuits - General Questions GK Quiz. Question and Answers related to Oscillator Circuits - General Questions. MCQ (Multiple Choice Questions with answers about Oscillator Circuits - General Questions
Calculate the value of C 1 = C 2 for the Wien bridge oscillator to operate at a frequency of 20 kHz. Assume R 1 = R 2 = 50 k and R 3 = 3R 4 = 600 ?
Options
A : 1.59 pF
B : 15.9 pF
C : 159 pF
D : 1.59 nF
Only the condition A = ________ must be satisfied for self-sustained oscillations to result.
Options
A : 0
B : –1
C : 1
D : None of the above
At what phase shift is the magnitude of A at its maximum in the Nyquist plot?
Options
A : 90º
B : 180º
C : 270º
D : 0º
Which of the following improvements is (are) a result of the negative feedback in a circuit?
Options
A : Lower output impedance
B : Reduced noise
C : More linear operation
D : All of the above
This circuit is a ________ oscillator.
Options
A : phase-shift
B : Wien bridge
C : Colpitts
D : Hartley
The feedback signal in a(n) ________ oscillator is derived from an inductive voltage divider in the LC circuit.
Options
A : Hartley
B : Armstrong
C : Colpitts
D : -
Given g m = 5000 S, r d = 40 k , R = 10 k , and A = 35. Determine the value of R D for oscillator operation at 1 kHz.
Options
A : 8.05 k
B : 8.48 k
C : 10.8 k
D : 12.3 k
The attenuation of the three-section RC feedback phase-shift oscillator is
Options
A : 1/9.
B : 1/30.
C : 1/3.
D : 1/29.
Referring to this figure, calculate the voltage gain without feedback for the following circuit values: R D = 4 k , R S = 1 k , R F = 15 k , and g m = 5000 ?S.
Options
A : –20.0
B : –21.5
C : –23.5
D : –25.5
For a phase-shift oscillator, the gain of the amplifier stage must be greater than ________.
Options
A : 19
B : 29
C : 30
D : 1
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