feedback loop
Quick Summary
In electronics, a feedback loop is a system where the output signal is fed back to the input, influencing the system's behavior. This can be either negative feedback, which tends to stabilize the system by counteracting changes, or positive feedback, which amplifies changes and can lead to oscillation.12
Negative feedback is used to correct distortions and stabilize circuits, ensuring consistent performance even with variations in components or temperature. Positive feedback, on the other hand, can cause an amplifier to generate its own AC signal, a process known as oscillation. This is fundamental to creating oscillator circuits used in radios and electronic watches.13
Servomechanisms are a prime example of feedback systems, using error-sensing feedback to automatically correct the performance of a mechanism, often controlling mechanical position.4
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