Hartleyoskillaattori

Hartleyoskillaattori is a type of electronic oscillator. It is named after American inventor Ralph Vinton Brown Hartley. The Hartley oscillator is characterized by its use of a single tapped inductor and a capacitor to determine its oscillation frequency. This configuration is similar to the Colpitts oscillator, which uses two tapped capacitors and a single inductor. The tapped inductor in a Hartley oscillator provides feedback from the tank circuit to the active amplifying device, typically a transistor or vacuum tube. This feedback is necessary to sustain oscillations. The tapping point on the inductor determines the ratio of inductance used in the tank circuit and the inductance providing feedback. Adjusting this tap point, along with the main capacitor, allows for tuning of the oscillator's output frequency. Hartley oscillators are known for their simplicity and can be constructed with relatively few components. They are commonly used in radio frequency applications and in signal generators where a tunable, stable sinusoidal output is required. The oscillation frequency is approximately determined by the formula f = 1 / (2 * pi * sqrt(L_total * C)), where L_total is the total inductance in the tank circuit and C is the capacitance.