The present invention provides undifferentiated human embryonic stem cells, methods of cultivation and propagation and production of differentiated cells. The driver circuit includes a pull-up circuit and a pull-down circuit, each having two or more current paths that either source currents to or sink currents from the output node. The stator is received in the frame and mounted to the mounting portion. At least one other inclination sensor is disposed at the vehicle. This circuit eliminates unnecessary analog devices so that fabrication migration issue is avoided. To achieve the above object of the present invention, each of plural switching elements is operated by a switching pulse generated by a drive control circuit of the motor.