Proportional-integral circuit having means for change-over betwe
Recording and/or reproducing apparatus having an active mode act
Reference signal circuit
Regulating device for an electromagnetic control element, especi
Sensor including means for operating the sensor in rate measurin
Sensorless control device for synchronous electric motor
Servo circuit
Servo circuit control method and system
Servo control booster system for minimizing following error
Servo control system carrying out coarse control and fine contro
Servo motor apparatus
Servo motor positioning control and position recording chip devi
Servo system employing a tracking digital angle encoder
Servo-motor control system
Servomotor control system for multi-axes
Servomotor controller
Speed detecting device
Spindle control system
Spindle orient device
Spindle orientation control apparatus