feedback circuit
Noun: A feedback circuit is an electronic circuit or system configuration that returns a portion of its output signal to its input. This process allows the system to automatically regulate, control, or modify its own performance based on the output it produces.
A feedback circuit is a fundamental concept in electronics, control systems, and engineering. It describes the specific pathway or loop where output information is sent back to influence the input.
Examples: * The amplifier's stability is maintained by a carefully designed feedback circuit. * In this thermostat, a simple feedback circuit compares the room temperature to the set point and turns the heater on or off. * The engineer analyzed the feedback circuit to understand why the system was oscillating.
- Negative Feedback Circuit: A specific type of feedback circuit where the returned signal opposes the input signal. This is commonly used to stabilize systems, reduce distortion, and improve accuracy.
- Example: Negative feedback circuits are essential in operational amplifiers to control gain precisely.
- Positive Feedback Circuit: A circuit where the returned signal reinforces the input signal, often leading to rapid increases or oscillations.
- Example: A squealing public address system is often caused by an unintended positive feedback circuit between the microphone and speaker.
- Feedback Loop: A more general term describing the complete cycle of output being sensed and fed back to influence the input, of which a feedback circuit is the physical implementation.
- Control Loop: A broader engineering term that includes the feedback circuit as a key component for maintaining a desired state or setpoint.
- Regulatory Circuit
- Control Circuit (in many contexts)
- To employ/integrate a feedback circuit: To use or include this type of circuit in a design.
- Example: The new design will integrate a feedback circuit for better voltage regulation.
- Feedback path: The specific route the signal takes from the output back to the input within the feedback circuit.
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a circuit that feeds back some of the output to the input of a system
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