Motorola

About: Motorola is a company organization based out in Schaumburg, Illinois, United States. It is known for research contribution in the topics: Signal & Communications system. The organization has 27298 authors who have published 38274 publications receiving 968710 citations. The organization is also known as: Motorola, Inc. & Galvin Manufacturing Corporation.

Packet data in an analog cellular radiotelephone system

Abstract: A method and apparatus for circuit-switched and single-user traffic channel packet data communication in a cellular radiotelephone system, including a base station (10) and mobile data unit (5) both operable for establishing either a circuit-switched data call connection or a single-user connectionless packet data traffic channel via a radio channel (7), and communicating packet data over the established radio channel.

Metallization scheme providing adhesion and barrier properties

Abstract: A titanium-tungsten-nitride/titanium-tungsten/gold (TiWN/TiW/Au) packaging interconnect metallization scheme is used to provide electrical contact to chip level interconnect metallization on a semiconductor substrate. The TiWN/TiW/Au packaging interconnect metallization scheme provides for good adhesion and barrier properties that withstand high temperatures and improve the reliability of the semiconductor chip. The TiWN layer provides good adhesion to the chip level interconnect metallization and the passivation layer. It also provides improved barrier properties to prevent the diffusion of other metal atoms through it. The TiW layer provides good adhesion to the gold metal layer. A gold bump may be electroplated to the gold layer and automatically bonded to a conductive lead of a tape in TAB packaging; or a wire bonded to the gold layer in conventional packaging.

Cascadable content addressable memory and system

Abstract: A system for a pipeline cascaded content addressable memory CAM system for sequentially processing input data includes an input register, a CAM core, cascade logic and an output register. As the memory association functions produce matches in the CAM core, the cascade logic in parallel composites data associated with each matching CAM core. Each cascade processes a separate data input simultaneously then passes on the cumulative results to the next stage.

Coexistence and incumbent protection in a cognitive radio network

Abstract: A method (300, 400) and a communication system (104, 106, 200) for dynamic RF spectrum allocation among a plurality of RF transmitters (108, 110, 112). A message can be received from a first communication system. The message can include a request (130) for available RF spectrum over which to transmit RF signals. The message can indicate a geographic location of a first non-incumbent transmitter (112) associated with the first communication system. Further, for the RF spectrum, a maximum power level can be determined at which the first non-incumbent transmitter may transmit without exceeding a threshold level of interference at least one focal point (134). A RF spectrum list (138) identifying at least the RF spectrum and the determined maximum power level can be communicated to the first communication system.

Multiple format signalling protocol for a selective call receiver

Abstract: A selective call receiver (11) comprises a receiver (13) for receiving a signal, the signal comprising an address identifying the selective call receiver, a first information packet having a first information format, a second information packet having a second information format, and a control character. An output device (17) presents the first information packet in a first output mode corresponding to the first information format in response to the control character, and the second information packet in a second output mode corresponding to the second information format in response to the address or a second control character.