positive feedback

Amplifying loop mechanism

Positive feedback is a process where an effect amplifies its own cause, creating a self-reinforcing cycle.

In electronics and biology, a signal strengthens itself: Positive feedback in the audio system caused that screeching noise.

The term also means encouraging responses to someone's work or behavior: She got positive feedback on her presentation.

The two senses are nearly opposite—one describes runaway amplification, the other simple approval.

biology

amplification

Increase in intensity

homeostasis · childbirth · lactation · clotting · oxytocin · cytokine · morphogenesis · fever · ovulation · action potential

electronics

amplification

Increase in intensity

  • oscillationRepeated back-and-forth movement
  • gainPositive return received
  • loopCurve closing on itself

regeneration · instability · saturation · distortion · circuit · signal · resonance · squealing · howling · microphone

Categories
Opposites
feedback loop type (systems theory)

positive feedbacknegative feedback

Response indicating problems

criticism · disapproval · condemnation · censure · rebuke

response presence

positive feedbacksilence

Total lack of sound

radio silence

Family

position, positive, opposite, composition, feedback, composite, positively, disposition, affirmative

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Positive · Everyday, not technical · Rated G