A power converter system includes multiple converter modules connected to a share bus. When outputting digital data of pixels of a single row in the imaging unit in the both modes, the conversion unit outputs digital data of a first color from a first port and outputs digital data of a second color from a second port. Therefore, the determination is made whether to operate a first electric motor depending on the mixing ratio of ethanol, making it possible to obtain increased fuel economy performance in line with the mixing ratio of ethanol. A pulse is applied to the RC circuit, the step response of which is periodically sampled. The anchor’s rotatability and swivelability allow the lower implant body to be implanted at an angle in bone while permitting the crown to be positioned in a natural tooth orientation.