Hartley Oscillator. So unlike normal lc oscillator the hartley oscillator uses an lc parallel feedback configuration that has self tuning base oscillator circuit. Hartley oscillator was invented by ralph hartley in 1915 and hence named so.
As we discussed in the lc oscillators article that if the reactance elements x1 and x2 are chosen as inductors and x3 as capacitor in the feedback network then the oscillator is called as hartley oscillator. In a hartley oscillator the oscillation frequency is determined by a tank circuit comprising of two inductors and one capacitor. Hartley oscillator was invented in 1915 by the american engineer ralph hartley while he was working for the western electric company.
The distinguishing feature of the hartley oscillator is that the tuned circuit consists of a single capacitor in parallel with two inductors in series and the feedback signal needed for oscillation is taken from the center connection of.
The hartley oscillator is a particularly useful circuit for producing good quality sine wave signals in the rf range 30khz to 30mhz although at the higher limits of this range and above the colpitts oscillator is usually preferred. Due to the reason for a wide range of frequencies it is a popular oscillator. Hartley oscillator is an lc oscillator. As we discussed in the lc oscillators article that if the reactance elements x1 and x2 are chosen as inductors and x3 as capacitor in the feedback network then the oscillator is called as hartley oscillator.
