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Physical Sciences
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Harmonic Motion and Waves Virtual Lab
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Hartley Oscillator
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Hartley Oscillator
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Theory
Procedure
Self Evaluation
Simulator
Assignment
Reference
Feedback
1)
In a transistor Hartley oscillator
Entire coil is in the output circuit
Resistive feedback is used
Inductive feedback is used
Capacitive feedback is used
2)
The feedback signal in which of the following oscillator is derived from an inductive voltage divider in the LC circuit
Weins bridge oscillator
Phase shift Oscillator
Colpitts Oscillator
Hartley Oscillator
3)
One condition for positive feedback is that the phase shift around the feedback loop must be
0
45
90
180
4)
What type of sine-wave oscillator uses a tapped inductor to provide the positive feedback required for oscillation?
Hartley Oscillator
Colpitts Oscillator
Clap Oscillator
Pierce Oscillator
5)
What type of capacitor is usually used in the tuned circuits of oscillators?
Electrolytic
High voltage
Low loss
Surface mount
6)
For sustaining oscillations in an oscillator
Phase shift should be negative and phase shift should be 0 or π/2
Feedback factor should be unity and phase shift should be 0 or nπ
Feedback factor should be negative and phase shift should be 0 or nπ
Phase shift should be unity and phase shift should be 0 or π/2
7)
Choose the right answer for Barkhausen criteria
βA=+1
βA=0
βA=-1
β=A
8)
Which of the following factors do not affect the frequency stability of an oscillator?
Inter-element capacitances and stray capacitances
Temperature variation
Output load
Coil size
9)
In Hartley oscillator, the expression for frequency of oscillation is given by
f=1/(2π√R1R2C1C2)
f=1/(2π√LC)with L=L1+L2
f=1/(2π√LC)with C=C1C2/(C1+C2)
f=1/(2πRC√6)
Cite this Simulator:
vlab.amrita.edu,. (2011). Hartley Oscillator. Retrieved 21 May 2024, from vlab.amrita.edu/index.php/userfiles/?sub=1&brch=201&sim=1137&cnt=3
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