What is the difference between Colpitts oscillator and Hartley Oscillator?
Colpitts oscillator was invented by American scientist Edwin Colpitts in 1918. Thus the main difference between a Colpitts Oscillator and a Hartley Oscillator is that the former uses tapped capacitance, while the latter uses tapped inductance.
What are Colpitts and Hartley Oscillator?
Then to summarise, the Hartley Oscillator consists of a parallel LC resonator tank circuit whose feedback is achieved by way of an inductive divider. The Colpitts oscillator uses two capacitors in series to form a centre tapped capacitance in parallel with a single inductance within its resonant tank circuit.
What type of oscillator is Colpitts?
A Colpitts Oscillator is a type of LC oscillator. The distinguishing feature of the Colpitts oscillator is that the feedback for the active device is taken from a voltage divider made of two capacitors in series across the inductor.
Which oscillator is most stable?
Crystal Oscillator
Crystal Oscillator: A crystal oscillator is the most stable frequency oscillator.
What are the advantages of Colpitts oscillator?
Advantages
- Colpitts oscillator can generate sinusoidal signals of very high frequencies.
- It can withstand high and low temperatures.
- The frequency stability is high.
- Frequency can be varied by using both the variable capacitors.
- Less number of components are sufficient.
What is the use of Colpitts oscillator?
It is used for generation of sinusoidal output signals with very high frequencies. The Colpitts oscillator using SAW device can be used as the different type of sensors such as temperature sensor. As the device used in this circuit is highly sensitive to perturbations, it senses directly from its surface.
Which feedback is used in Colpitts oscillator?
Voltage series feedback is used in Colpitts oscillator. In voltage series feedback a part of output voltage is fed back to input.
What is the advantage of Colpitts oscillator?
Advantages. Colpitts oscillator can generate sinusoidal signals of very high frequencies. It can withstand high and low temperatures. The frequency stability is high.
Why Colpitts oscillator is used?
Which type of feedback is used by Colpitts oscillator?
Voltage series feedback
Voltage series feedback is used in Colpitts oscillator. In voltage series feedback a part of output voltage is fed back to input.
How the feedback is obtained in a Colpitts oscillator?
The Colpitts oscillator uses a capacitive voltage divider network as its feedback source. As with the Hartley oscillator, the Colpitts oscillator uses a single stage bipolar transistor amplifier as the gain element which produces a sinusoidal output.
What is used in Colpitts oscillator for oscillation?
The Colpitts oscillator uses a capacitive voltage divider network as its feedback source. Then C1, C2 and L form the tuned tank circuit with the condition for oscillations being: XC1 + XC2 = XL, the same as for the Hartley oscillator circuit.