Encoder precision compensation circuit and encoder precision compensation device

The embodiment of the invention relates to the technical field of encoder precision compensation, and discloses an encoder precision compensation circuit and an encoder precision compensation device.The encoder precision compensation circuit comprises a signal processing circuit, an angle deviation measuring circuit and a programmable logic array, the signal processing circuit obtains multiple sine and cosine signals sent by the encoder and converts the multiple sine and cosine signals into corresponding angle digital signals. The angle deviation measuring circuit measures the angle deviation of the angle digital signal to obtain angle deviation data, and the programmable logic array performs angle compensation on the angle digital signal according to the angle deviation data and outputs the compensated angle digital signal to the servo driver. The precision of the angle digital signal received by the servo motor is improved. Therefore, the precision of the encoder in the process is close to the repeated prec