An electric power converter has a main circuit section including a semiconductor module and a cooling device; a control circuit substrate section electrically connected to a signal terminal of the semiconductor module, and having a control circuit; and a power wiring section connected to a main electrode terminal of the semiconductor module. The same gainskew calibration metrics may be applied to baud sampled and oversampled systems, including wideband receivers and regardless of any modulation, by applying a timing or frequency offset to non-stationary sampled signals during initial training. Thus, it is possible to suppress a variation in reset potential among effective pixels. A medicant device may be mounted in the second port wherein the medicant device having a mouthpiece that may be inserted and retracted relative to the mask chamber and a patients mouth.