The positive feedback is required by an amplifier to act an oscillator. The feedback here means :

Question

The positive feedback is required by an amplifier to act an oscillator. The feedback here means : (A) External input is necessary to sustain ac signal in output. (B) A portion of the output power is returned back to the input. (C) Feedback can be achieved by LR network. (D) The base-collector junction must be forward biased.

Tardigrade Admin · Accepted Answer

When the amplifier connects with positive feedback, it acts as the oscillator the feedback here is positive feedback which means some amount of voltage is given to the input.

Q. The positive feedback is required by an amplifier to act an oscillator. The feedback here means :

External input is necessary to sustain ac signal in output.

A portion of the output power is returned back to the input.

Feedback can be achieved by LR network.

The base-collector junction must be forward biased.

When the amplifier connects with positive feedback, it acts as the oscillator the feedback here is positive feedback which means some amount of voltage is given to the input.