A servo system, also known as a follow-me system, is a feedback control system used to precisely follow or reproduce a process. Servo systems enable an automatic control system in which the output controlled quantities such as position, orientation and state of an object can follow any change in the input target (or given value). The servo system consists of a control module, sensors and servo motors; the sensors are encoders and current sensors. The current sensor assists the encoder in position detection and has a very important role to play. The good or bad choice of current sensor directly affects the performance of the servo system. The servo system has high ripple requirements for the signal and the user has different requirements for ripple, so it is necessary to match the appropriate RC circuit to meet the ripple requirements and to consider the user's requirements for bandwidth.
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