Explain what is meant by system feedback.
System feedback refers to the information or output that is provided to a system based on its performance or behavior. It is a process by which a system receives signals or responses, analyzes them, and makes adjustments or improvements accordingly.
In the context of various systems like electronic circuits, control systems, or even human-made systems, feedback serves as a mechanism to monitor and regulate the system's performance. It helps in maintaining stability, improving accuracy, and achieving desired outcomes.
There are two types of system feedback:
1. Positive Feedback: It occurs when the system's output enhances or amplifies the initial input or disturbance. This feedback loop leads to an exponential increase or instability. Positive feedback is often used to achieve rapid and significant changes, such as in amplifiers or oscillators.
2. Negative Feedback: It happens when the system's output opposes the initial input or disturbance, reducing the difference between the desired output and the actual output. Negative feedback is commonly employed to maintain stability, accuracy, and control in systems. It helps minimize errors or deviations by constantly comparing the desired output with the actual output and making necessary adjustments to achieve a desired result.
Overall, system feedback plays a crucial role in ensuring that systems operate efficiently, adapt to changing conditions, and achieve the desired goals or outcomes.