Transistor as Oscillator

When we use atransistorin a circuit, it continuously produces undamped oscillations at the output terminals of the circuit. Here we can explain you how touse a transistor as an oscillator with the help of circuit diagram.

Oscillator circuit:

The diagram ofTransistor oscillator circuitis shown below. This circuit is divided into three sections:

(i) Tank Circuit:This circuit produces oscillations which are amplified by the transistor and produces amplified output in the collector side.

(ii) Amplifier circuit:This circuit basically amplifying the small sinusoidal oscillations present in the base-emitter circuit and generates output in the amplified form.

(iii) Feedback circuit:This is the important section of the circuit because to amplify the oscillations for the amplifier we need some energy at the tank circuit. For this purpose, we fed back the energy of the collector circuit to the base circuit through the phenomenon ofMutual induction. We fed back the energy from output to input with the help of this circuit.