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.

Area array semiconductor device having a lid with functional contacts

Abstract: An area array semiconductor device (10) having a lid with functional I/O contacts can be manufactured. In one embodiment, a semiconductor die (12) is mounted in a die cavity (16) of a substrate (14). A plurality of wire bonds (20) connect the die to conductive traces (18) on a surface of the substrate. A lid (22) having conductive traces (26) on an inner surface, which are electrically interconnected to an area array of contact pads (28) on an outer surface by a plurality of plated through-holes (30), is attached to the substrate with an anisotropic conductive adhesive (32). The adhesive electrically connects the conductive traces on the substrate to the conductive traces on the lid. A plurality of conductive pins (34) are attached to the area array of contact pads to provide one method of mounting the device to a board.

Feature extraction using information-theoretic learning

Abstract: A classification system typically consists of both a feature extractor (preprocessor) and a classifier. These two components can be trained either independently or simultaneously. The former option has an implementation advantage since the extractor need only be trained once for use with any classifier, whereas the latter has an advantage since it can be used to minimize classification error directly. Certain criteria, such as minimum classification error, are better suited for simultaneous training, whereas other criteria, such as mutual information, are amenable for training the feature extractor either independently or simultaneously. Herein, an information-theoretic criterion is introduced and is evaluated for training the extractor independently of the classifier. The proposed method uses nonparametric estimation of Renyi's entropy to train the extractor by maximizing an approximation of the mutual information between the class labels and the output of the feature extractor. The evaluations show that the proposed method, even though it uses independent training, performs at least as well as three feature extraction methods that train the extractor and classifier simultaneously

Communication device having interchangeable faceplates and active keypad cover

Abstract: A communication device (1600) such as a portable radiotelephone handset features interchangeable faceplates including a first faceplate (1604) and a second faceplate (1804) which are removably attachable to a housing (1602). At least one of the plurality of faceplates includes a movable element (1802) such as a keypad cover. A sensor such as a switch (1574) detects the presence of the movable element (1802) and provides a detection signal to a controller (1560) which varies the operation of the communication device (1600) in response thereto.

Method of forming a three-dimensional printed circuit assembly

Abstract: A three-dimensional printed circuit assembly is formed by first making a substrate (20). A substrate (20) is first formed from a photoactive polymer (14) that is capable of altering its physical state when exposed to a radiant beam (30). At this point, the substrate is only partially cured. A conductive circuit pattern (50) is then formed on the partially cured substrate. The substrate is then molded to create a three-dimensional structure, and then further cured to cause the photoactive polymer to harden.

Microcellular communications system using macrodiversity

Abstract: A cellular system employing time division messages transmitted from a plurality of radiators (407, 409, 411) in each cell is disclosed. A first electromagnetic signal at a particular frequency is transmitted during one time slot (903) from one of the plurality of radiators. A second electromagnetic signal at the same frequency is transmitted during another time slot (917) from a second one of the plurality of radiators. A remote unit (401,403) selects the best electromagnetic signal and communicates the selection to a cell controller (413), which selects a third time slot for transmission of a message from the radiator transmitting the best electromagnetic signal.