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the Colpitts oscillator , named after the inventor of the circuit , is
characterised by the use of Two Capacitors in series which are then connected in
parallel across the inductor of the resonant circuit for obtaining the required
frequency.
The junction of the two capacitors is used for the positive feedback used
for generating the oscillations.
This circuit is used for High frequency oscillators , mainly due to ease of obtaining
required ratio of the two capacitor values as per the circuit design. Also the two
capacitors in series reduces their total equivalent value , which is not a problem as
in HF circuits as the values and size is comparatively low.
For information , a corresponding Low frequency circuit is called a
Hartley oscillator , also named after its inventor.
This uses a tapped inductor & one capacitor for the resonant circuit, since it is more
easier to fabricate large value tapped inductors , than to use two bulky ( since the
value of capacitors in series is reduced ) capacitors necessary for the equivalent
Colpitts oscillator.
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What type of transistor used in colpitts oscillator?
whatever works at the desired operating frequency
What the major components of a colpitts oscillator?
1.CE amplifier circuit 2.LC oscillator circuit
How is colpitts oscillator better than hartley oscillator?
No because hartley uses inductors which are bulky and economically not feasible to obtain tuning inductors as compared to colpitt's which uses capacitors which are relatively very cheap and small.
Which part of the hartely oscillator decides frequency of oscillations?
An oscillator has a tuned circuit (inductance+capacitance) to determine the frequency. When the inductor is tapped to give the required phase-shift for oscillation it is a Hartley oscillator. When the capacitance is tapped it is a Colpitts.
What type of oscillator used in handwatches?
a crystal 32.768kHz oscillator.
What are the advantages of oscillator?
clapp oscillator have frequency more stable and accurate than colpitts oscillator.
What type of transistor used in colpitts oscillator?
whatever works at the desired operating frequency
What are the advantages of clap oscillator?
clapp oscillator have frequency more stable and accurate than colpitts oscillator.
What is a Colpitts oscillator?
A Colpitts oscillator is the electrical dual of a Hartley oscillator. The Hartley oscillator is an LC electronic oscillator that derives its feedback from a tapped coil in parallel with a capacitor. http://en.wikipedia.org/wiki/Colpitts_oscillator http://en.wikipedia.org/wiki/Hartley_oscillator ~MECHASUN~ A Colpitts oscillator is the electrical dual of a Hartley oscillator. The Hartley oscillator is an LC electronic oscillator that derives its feedback from a tapped coil in parallel with a capacitor. http://en.wikipedia.org/wiki/Colpitts_oscillator http://en.wikipedia.org/wiki/Hartley_oscillator ~MECHASUN~
What is the difference between colpitts and hartley ossilator?
colpitts oscillator has two coils in series and one capacitor in parallel. hartley oscillator has one capacitor and one coil in parallel
What the major components of a colpitts oscillator?
1.CE amplifier circuit 2.LC oscillator circuit
What are the advantages of a Hartley oscillator?
advantages over what? Colpitts? Mostly the fact that it does not require a choke. A Hartley is more harmonic-rich than a Colpitts, so the main reason it is used lies in its (relative) ease of construction.
How is colpitts oscillator better than hartley oscillator?
No because hartley uses inductors which are bulky and economically not feasible to obtain tuning inductors as compared to colpitt's which uses capacitors which are relatively very cheap and small.
Which part of the hartely oscillator decides frequency of oscillations?
An oscillator has a tuned circuit (inductance+capacitance) to determine the frequency. When the inductor is tapped to give the required phase-shift for oscillation it is a Hartley oscillator. When the capacitance is tapped it is a Colpitts.
What is the Application of a Colpitts oscillator?
for radio frequnency ... and audio frequency. I have a Colpitts oscillator on a small piece of Veroboard 3/4"x 1/2"mounted on the terminals of a standard telephone earpiece. It uses the earpiece itslef as the inductor. The nominal impedance of the earpiece is about 300 ohms. With capacitors of 1μF and 0.47μF it oscillates at about 2kHz.
How does a Colpitts oscillator work?
A Colpitts oscillator is the electrical dual of a Hartley oscillator. In the Colpitts circuit, two capacitors and one inductor determine the frequency of oscillation. The feedback needed for oscillation is taken from a voltage divider made by the two capacitors, where in the Hartley circuit the feedback is taken from a voltage divider made by two inductors (or a tapped single inductor). (Note: the capacitor can be a variable device by using a varactor). Oscillation frequency The ideal frequency of oscillation for the circuit is given by the equation: where the series combination of C1 and C2 creates the effective capacitance of the LC tank. Real circuits will oscillate at a slightly lower frequency due to junction capacitances of the transistor and possibly other stray capacitances
When was A. Russell Colpitts born?
A. Russell Colpitts was born in 1906.
