DIGITAL SERVO CIRCUIT

摘要

The circuit is for minimizing the quantization error. The circuit comprises: an amplifier which amplifies difference signal of a servo object; an A/D convertor which converts outputs of the amplifier by A/D; an detecting circuit which detects lock state of the digital servo circuit; a gain control means which changes the loop gain of the digital servo circuit to oscillate the amplifier output to the maximum limit of the dynamic range of the A/D convertor.