Phenothiazine derivatives of formula are disclosed. The phase conductor is used for transmission of an electrical power flow. A sensor microphone is arranged in a volume between the first end and the region of the curvature of the diaphragm system. In an example embodiment, IO design objects are placed into IOBs of the programmable gate array by first performing simulated annealing that considers conflicts between IO attributes of IO design objects as placed into the IOBs.