The present invention relates to methods for the global and detail routing of integrated circuits with hierarchical interconnect routing architecture. In the digital AGC controlling apparatus, an SNR estimator estimates an uplink SNR of a next frame. To accomplish this object, switching control of an inverter that applies a three-phase current to a motor is performed by a control circuit in accordance with a duty based on detected values of voltage and current. At least one actuating element is arranged laterally on the sliding piston.