Question

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

Options

• 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.

Answer 1

The positive feedback is required by an amplifier to act an oscillator. The feedback here means A portion of the output power is returned back to the input.

Explanation:

Positive feedback occurs when a portion of the output is phase-locked with the input.