Abstract: A removable electrical interface device for transferring data to and from a host adapted to operate in one of a universal serial bus (USB) compatible mode, a Mu mode and a non-USB compatible mode includes a first row of contact pads capable of supporting at least one of USB Standard-A connection, Mu mode connection or non-USB compatible mode connection, and a second row of contact pads capable of supporting the Mu mode connection and the non-USB compatible mode connection.

Abstract: A Universal Serial Bus (USB) compound device and the method for implementation thereof are disclosed. The USB compound device does not include an embedded hub but simulates a hub by a circuit or firmware. Therefore, a set of independent function devices are able to connect to a USB bus via the same set of USB logic, and the production cost can be reduced without affecting the function of the device and the facility of expansion and plug-and-play function.

Abstract: An apparatus for controlling a rotational speed of a motor, coupled to a sensing unit capable of outputting a sensing signal. The apparatus includes a controlling unit, coupled to the sensing unit, for outputting a controlling signal according to the sensing signal and independently of the rotational speed of the motor. The controlling signal is a square wave and has a duty ratio that is determined by the sensing signal. The apparatus also includes a driving unit, coupled to the controlling unit, for outputting a driving signal to a motor rotor according to the duty ratio of the controlling signal. The driving signal also is a square wave. The rotational speed of the motor rotor is determined by the duty ratio of the driving signal.

Abstract: An integrating apparatus is provided, which includes a power supply for providing a power to be the main power of the integrating apparatus, a controller connected electrically with the power supply so as to control the operation of the integrating apparatus, a storage device connected electrically with the controller for storing a data, and at least a transmitting interface connected with at least a 3C equipment so that the 3C equipment transmits the data through the transmitting interface.

Abstract: A method for driving a brushless DC motor is disclosed in accordance with the present invention. Firstly, a driving control signal is generated based on sensed information of a motor rotor's magnetic field distribution. The driving control signal is inactive in the case that four rotor magnetic arcs are rotated more or less than critical positions of the rotor corresponding a stator. At that time, no magnetic fields are produced from the motor's stator, and thus the rotor rotates by inertial force. In another case, the driving control signal is issued in a conventional manner.