Abstract: An electromagnetic loudspeaker transducer; where its voice coil bobbin has a fully circumferential geometry to provide increased mechanical strength. When the bobbin to be made with sheet metal and sheet metal deep drawn it further provides a stiffened construction by work hardened metal during the process. The full circumferential bobbin made with metal also serve as a one turn coil to short out the induced current from back electromotive force due to the voice coil moving under the magnetic field from the audio transducer's motor structure. The bobbin also allows a support feature for the transducer diaphragm to attach to and avoid leaving a dent mark on sheet metal diaphragms.

Abstract: An audio loudspeaker with an internal magnet geometry motor having a slotted cylinder having closed ends, a pair of oppositely charged magnets sandwiching a top plate and disposed between the closed ends of the cylinder, and a diaphragm assembly having a bobbin with spokes which extend through the slots. Mechanically connecting to the voice coil radially through the cylinder enables the lower suspension component to be places much lower and farther from the upper suspension component, improving stability of the suspension. The closed ends of the motor provide extremely low magnetic reluctance for the magnetic circuits at the respective ends of the motor.

Abstract: A data-packet processing method is used in a network system. The network system includes a buffer for optionally storing a data packet to be transferred, and the method includes steps of: determining a type of the data packet to be transferred; determining a storage state of a buffer where the data packet is to be temporarily stored before transferring; and storing the data packet into the buffer if the storage state of the buffer is a packet-accepting storage state; wherein the packet-accepting storage state of the buffer varies with the type of the data packet.

Abstract: A data-packet processing method is used in a network system. The network system includes a buffer for optionally storing a data packet to be transferred, and the method includes steps of: determining a type of the data packet to be transferred; determining a storage state of a buffer where the data packet is to be temporarily stored before transferring; and storing the data packet into the buffer if the storage state of the buffer is a packet-accepting storage state; wherein the packet-accepting storage state of the buffer varies with the type of the data packet.

Abstract: A multiported LAN switch comprised of legacy local area network ports and ATM ports. Each ATM port comprising a hardware forwarding engine for bridging LAN frames from the LAN ports to the ATM port. The hardware forwarding engine converts layer 2 protocols between the dissimilar ports expediently, without requiring intervention by a microprocessor. A substantial performance gain is attained compared to microprocessor controlled format converters. Both LAN emulation and virtual LANs are supported.