A.C. motor control
Actuator controller using periodic signal
Actuator positioning apparatus
Apparatus for distance control
Automatic residual phase error compensation circuit for a digita
Circuit and method for modulating the commutation frequency of a
Circuit arrangement for synthesizing a sinusoidal position signa
Circuit for preventing abnormal rotation of a spindle motor
Circuit for shaping and making use of armature current ripple as
Control apparatus for a rotor supported by an electromagnetic be
Control circuit for DC capstan motor
Control device for a vibration wave motor
Control unit of direct-current motor
Device for controlling rotational speed of motor
Device for position control
Digital control device
Digital current regulator
Digital servo apparatus
Digital servo-control apparatus for preventing torque variations
Digital signal processor for servo velocity control