Abstract: An embedded processor system having a single-chip embedded microprocessor with analog and digital electrical interfaces to external systems. A novel processor core uses pipelined execution of multiple independent or dependent concurrent threads, together with supervisory control for monitoring and controlling the processor thread state and access to other components. The pipeline enables simultaneous execution of multiple threads by selectively avoiding memory or peripheral access conflicts through the types of pipeline stages chosen and the use of dual and tri-port memory techniques. The single processor core executes one or multiple instruction streams on multiple data streams in various combinations under the control of single or multiple threads.

Abstract: A robust multipoint master-slave radio frequency system for transmitting signals digitally using combination of reinforcing techniques including: 1) hybrid spread spectrum approaches, 2) adaptive frequency and time slot management, 3) graceful degradation of signal quality, and 4) time multiplexing of peripheral, sub-peripherals and base transceiver signals. An improved method of coordinating multiple base transceivers using a distributed control, synchronization and communication approach. Such an approach is not impacted by the loss or addition of a new base transceiver and adapts to changing radio frequency conditions.

Abstract: An omni-directional, planar folded dipole antenna and related quadrature phase shifter implemented on printed circuit boards (PCBs) having differing properties that are perpendicularly engaged. The planar antenna segment is implemented on a single-sided inexpensive PCB and a quadrature phase shifter and system electronics are implemented on more expensive multi-layer PCBs. The invention reduces cost and improves system reliability because coaxial or like connectors of varying material and installation quality are not required between a planar antenna and a quadrature phase shifter. Planar antenna transmits radio frequency signals in an omni-directional pattern and is capable of receiving signals from remote dipole antennas positioned in arbitrary physical orientations. The quadrature phase shifter provides both phase shifting functions and also converts an unbalanced radio frequency transceiver output signal into a balanced input signal to the planar antenna.

Abstract: An improved game controller. D-pad keys are positioned above a printed circuit board-with plungers guided by housing apertures. The D-pad key is top-loaded into contact with the housing to simplify manufacture and operating reliability. The D-pad key can be depressed downwardly until it contacts a pivot supported by a pivot post. The combination of elements permits significant design flexibility in the orientation and shape and operation of a D-pad key. Front mounted triggers replace front mounted buttons attached to a separate vertical printed circuit board. The triggers function with the main printed circuit board, thereby reducing cost and enhancing product reliability.

Abstract: A portable game controller for operating an electronic game device. The controller communicates between a person and the game device with a radio frequency sender and receiver. Signal transmission is communicated over the same channel with time domain multiplexing, and can be sent over one or more channels to expand the number of controllers operable in a system. Signal transmission can be delivered in short intervals to conserve battery power. Multiple persons can deliver signals through multiple senders or through a common radio frequency sender, and signals can be transmitted from the radio frequency receiver to the radio frequency sender.

Abstract: A portable, battery operated electronic device for facilitating battery exchange. The electronic device housing has an opening for containing the battery. The opening has first and second apertures for permitting the battery to be pushed directly into contact with a retainer. Access to the battery is unobstructed to expedite battery exchange and to permit movement of the battery in different directions through the housing opening. The method of the invention permits quick exchange of batteries so that continuous operation of the electronic device is not encumbered. By sliding the battery against electrical contacts within the opening, the contacts are automatically cleaned during battery replacement. Visual contact with the battery permits continuous display of battery charge strips attached to the battery exterior case.

Abstract: A portable electronic apparatus comprises a housing for facilitating battery exchange therein. The housing has an opening for containing the battery. The opening has first and second apertures for permitting the battery to be pushed directly into contact with a retainer. Access to the battery is unobstructed to expedite battery exchange and to permit movement of the battery in different directions through the housing opening. Multiple retaining arms can have arcuate surfaces for holding the battery. The housing can have multiple retaining arms having complementary battery holding surfaces and can have two housing sections attached to the multiple retaining arms. Each of the two housing sections can be attached to retaining arms each having an arcuate surface for contacting the battery, and the retaining arms can be oriented in an interleaved configuration.

Abstract: A game controller for communication between a user and an electronic game device transmitting signals to a receiver. The game controller identifies weakness in signal strength or operation and permits adjustment to a more effective operating frequency. The game controller comprises a portable housing, game controller keys attached to the housing for permitting the user to generate signals, a radio frequency sender engaged with the game controller keys for transmitting the signals to the receiver; and a controller attached to sender for determining a selected parameter regarding the signals and for communicating the parameter to the user. The radio frequency sender is capable of transmitting signals over multiple frequencies and preferable operates with the Remote Band frequency range. At least one of the keys can be operable by the user to change the signal frequency or the controller can automatically change the signal frequency to a more effective frequency.