A fuel cell that generates power without discharging fuel gas includes: an electrolyte membrane ; an anode provided on one side of the electrolyte membrane; and a fuel-gas passage portion provided on the outer side of the anode to form a fuel-gas supply passage through which fuel gas is supplied to the anode. The inventive phase error detector calculates the phase correction signal according to the detected decision domain in accordance with a number of predetermined calculating methods. The second substrate faces the first substrate. The wheel 1 receives the motor 20 and is connected to the rotor. A bar is connected at one end to the crank mechanism and another end is operably connected to the lip.