Essentials of LC Oscillator | Physics Video Tutorials
Animation shows the block diagram of an oscillator. Its essential components are tank circuit, amplifier and feedback circuit.
Tank circuit : It consists of inductance coil (L) connected in parallel with capacitor (C). The frequency of oscillations in the circuit depends upon the values of inductance coil and capacitance of the capacitor.
Amplifier : The transistor amplifier receives d.c. power from the battery and changes it into a.c. power for supplying to the tank circuit.
Feedback circuit : It provides positive feedback (i.e.) this circuit transfers a part of output energy to LC circuit in proper phase, to maintain the oscillations.
LC oscillators: A transistor can work as an LC oscillator to produce
undamped oscillations of any desired frequency, if tank and feedback circuits are properly connected to it.
