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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
Capacitive feedback is used
Resistive feedback is used
Inductive feedback is used
Entire coil is in the output circuit
2)
The feedback signal in which of the following oscillator is derived from an inductive voltage divider in the LC circuit
Colpitts Oscillator
Weins bridge oscillator
Phase shift Oscillator
Hartley Oscillator
3)
One condition for positive feedback is that the phase shift around the feedback loop must be
180
45
90
0
4)
What type of sine-wave oscillator uses a tapped inductor to provide the positive feedback required for oscillation?
Colpitts Oscillator
Pierce Oscillator
Hartley Oscillator
Clap Oscillator
5)
What type of capacitor is usually used in the tuned circuits of oscillators?
Surface mount
High voltage
Electrolytic
Low loss
6)
For sustaining oscillations in an oscillator
Phase shift should be negative and phase shift should be 0 or À/2
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
Feedback factor should be negative and phase shift should be 0 or nÀ
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/(2ÀRC√6)
f=1/(2À√LC)with C=C1C2/(C1+C2)
f=1/(2À√LC)with L=L1+L2
Cite this Simulator:
vlab.amrita.edu,. (2011). Hartley Oscillator. Retrieved 2 April 2025, from vlab.amrita.edu/?sub=1&brch=201&sim=1137&cnt=3
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