Advantages:
Good wave purity
Fine performer at high frequency
Good stability at high frequency
Wide operation range 1 to 60 MHz
Disadvantages:
Poor isolation (Load impedance v.s. frequency)
Hard to design
by samiur rahman hasib
Because it improves the frequency stability and eliminates the effect of transistor parameters on the operation of the circuit.
A preferred dividend is a hybrid stock of sorts. It can be used as both an equity tool and a system of debt.
Capillary puncture
Blue sterile tube?
neither, caterpillars prefer warm conditions.
A Standing Wave, the principle of superposition states that : The resultant of two or more superposed harmonic vibrations is simply the sum of the displacements of the individual vibrations.To understand better what is a stationary wave, you should understand how stationary waves are formed.Check out Melde's set up.Melde, set up an apparatus, where one end produced a wave when the oscillator was switched on, the wave then hit the pulley and bounced back. This wave hit the incoming new wave from the oscillator and since they had the same characteristics (same wavelength, speed, frequency) and were in the opposite direction they created a stationary wave.
clapp oscillator have frequency more stable and accurate than colpitts oscillator.
clapp oscillator have frequency more stable and accurate than colpitts 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.
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~
colpitts oscillator has two coils in series and one capacitor in parallel. hartley oscillator has one capacitor and one coil in parallel
1.CE amplifier circuit 2.LC oscillator circuit
whatever works at the desired operating frequency
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.
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.
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.
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
A. Russell Colpitts was born in 1906.