A semiconductor integrated circuit device is employed in a DC-DC converter that switches the voltage fed to the load depending on the PWM signal. The etching stopper is located in a tiling portion that is utilized for tiling substrates to form a large-sized X-ray detector. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH1DB1 through backcross conversion andor transformation, and to the maize seed, plant and plant part produced thereby. When an abnormal operation occurs, the comparison circuit supplies an abnormal operation control signal to the inverter control circuit. Said process allows at least a part of the aqueous stream coming from the Fischer-Tropsch reaction to be used as process water in a synthesis gas production plant, subsequently sent to a Fischer-Tropsch plant for the production of hydrocarbons.