Concept of Negative Feedback Negative feedback is a mechanism in which an output signal is used to regulate the input signal and maintain a desired set poin...
Concept of Negative Feedback
Negative feedback is a mechanism in which an output signal is used to regulate the input signal and maintain a desired set point. When the output signal is compared to the set point, it is sent back to the input, where it influences the input signal. This negative feedback loop helps to maintain a stable and predictable output signal despite changes in the input or disturbances.
How it works:
The output signal is compared to the set point.
If the output is higher than the set point, the difference is sent back to the input.
This feedback signal reduces the input signal, bringing the output signal closer to the set point.
As the input and output signals become more closely matched, the output signal reaches the set point and remains stable.
Examples:
Automotive systems: Negative feedback is used in automotive systems to maintain stable engine temperature, speed, and fuel consumption.
Electronic circuits: Negative feedback is employed in electronic circuits to stabilize the output voltage of a power supply.
Musical instruments: Negative feedback is used in some musical instruments, such as guitars and pianos, to control the volume of the sound output.
Benefits of Negative Feedback:
Stability: Negative feedback helps to stabilize the output signal and maintain a constant output regardless of changes in the input.
Robustness: Negative feedback is robust against disturbances, as changes in the input signal will be filtered out by the feedback loop.
Precision: Negative feedback can be used to achieve high precision in the control of output variables