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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
Inductive feedback is used
Capacitive feedback is used
Resistive feedback is used
2)
The feedback signal in which of the following oscillator is derived from an inductive voltage divider in the LC circuit
Phase shift Oscillator
Hartley Oscillator
Weins bridge oscillator
Colpitts Oscillator
3)
One condition for positive feedback is that the phase shift around the feedback loop must be
180
90
45
0
4)
What type of sine-wave oscillator uses a tapped inductor to provide the positive feedback required for oscillation?
Clap Oscillator
Colpitts Oscillator
Hartley Oscillator
Pierce Oscillator
5)
What type of capacitor is usually used in the tuned circuits of oscillators?
Electrolytic
High voltage
Surface mount
Low loss
6)
For sustaining oscillations in an oscillator
Feedback factor should be negative and phase shift should be 0 or nÀ
Phase shift should be unity and phase shift should be 0 or À/2
Feedback factor should be unity and phase shift should be 0 or nÀ
Phase shift should be negative and phase shift should be 0 or À/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
Output load
Temperature variation
Coil size
9)
In Hartley oscillator, the expression for frequency of oscillation is given by
f=1/(2À√R1R2C1C2)
f=1/(2À√LC)with L=L1+L2
f=1/(2À√LC)with C=C1C2/(C1+C2)
f=1/(2ÀRC√6)
Cite this Simulator:
vlab.amrita.edu,. (2011). Hartley Oscillator. Retrieved 5 September 2026, from vlab.amrita.edu/?sub=1&brch=201&sim=1137&cnt=3
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