A power amplifier amplifying and compositing differential signals and capable of suppressing harmonics is provided. The air control module controls a throttle valve of an engine based on an adjusted predicted torque request. Said driving means comprise a motor, to the shaft of which the supports are associated by means of a pair of connecting rods or a connecting rod and crank mechanism, so that operation of the motor causes joint movement of the supports, which move away from and approach each other alternately. The preferred architecture further supports multiple-site data buffering for redundancy and reliability, and real-time data collection, routing, and viewing. Each of the wire congestion values identifies a relative likelihood of a corresponding one of the wires being used to provide the signal paths in comparison with the other wires.