A negative feedback circuit refers to an electronic circuit configuration that employs negative feedback to regulate and stabilize the performance of the circuit. It operates by utilizing the output of a circuit in order to generate a correction signal that is then fed back to the input, counteracting any fluctuations or deviations. This feedback mechanism is critical for maintaining stability, reducing distortion, and improving the overall performance of the circuit.
In a negative feedback circuit, the correction signal is opposite in phase to the input signal, hence the term "negative." This inverse relationship ensures that any changes occurring in the circuit's output are corrected back towards the desired value, effectively reducing any deviation from its intended operation. By doing so, the circuit is able to self-regulate and maintain a consistent performance under varying conditions such as temperature, load changes, or component variations.
One common application of negative feedback circuits is in amplifiers, where they are used to control gain, increase linearity, and reduce distortion. By employing negative feedback, the circuit compensates for any non-ideal characteristics of the amplifier, such as inherent inefficiencies or nonlinearities, resulting in a more accurate and faithful reproduction of the input signal.
Overall, the negative feedback circuit is an essential component in electronics, providing stability, accuracy, and enhanced performance in a wide range of applications.
