What is the term for positive feedback that makes any amplifier an oscillator?

What is the term for positive feedback that makes any amplifier an oscillator?

• A. Amplifier
• B. Oscillator
• C. Feedback Loop
• D. Regenerative Feedback Path

Answer: (D)

Regenerative feedback is positive feedback that reinforces the signal in the loop until the circuit can sustain oscillations. When the feedback path returns a signal in phase with the input and the loop gain reaches the right value (the Barkhausen condition), the amplifier acts as an oscillator. The term regenerative feedback path specifically describes the portion of the circuit that provides that positive, self-amplifying feedback, which is why it’s the best descriptor for turning an amplifier into an oscillator. A general feedback loop can be either positive or negative, and an amplifier by itself isn’t an oscillator unless that positive feedback is present and strong enough to sustain the oscillation.

Regenerative feedback is positive feedback that reinforces the signal in the loop until the circuit can sustain oscillations. When the feedback path returns a signal in phase with the input and the loop gain reaches the right value (the Barkhausen condition), the amplifier acts as an oscillator. The term regenerative feedback path specifically describes the portion of the circuit that provides that positive, self-amplifying feedback, which is why it’s the best descriptor for turning an amplifier into an oscillator. A general feedback loop can be either positive or negative, and an amplifier by itself isn’t an oscillator unless that positive feedback is present and strong enough to sustain the oscillation.