loop gain

Loop gain is a measure of how much a system amplifies or responds to its own feedback signal as it completes a feedback loop. In control systems, it indicates how effectively the system corrects errors by comparing the desired output to the actual output and adjusting accordingly. If the loop gain is high, the system reacts strongly to deviations, promoting stability and accuracy. Conversely, low loop gain means weaker correction, possibly leading to sluggish response. Properly tuning loop gain ensures the system maintains the desired performance without becoming unstable or overly sensitive.