Abstract: A method for introducing a known concentration of at least one species of ions into the surface or near surface of a substrate can be employed as a calibration technique prior to subsequent surface or near surface measurement. The method involves the introduction of a removable layer onto the surface followed by ion implantation which is performed to provide a known concentration of implanted ion at the interface between the removable layer and the surface. Subsequent to removal of the removable layer, the surface can be subjected to determination of elemental concentrations at the surface or near surface levels by techniques such as total reflection x-ray fluorescence or secondary ion mass spectrometry.

Abstract: A user interface for a graphical application tool is disclosed. A graphical application tool is a software program, such as a computer-aided design (CAD) tool, a spreadsheet package, or a graphics drawing package, that graphically provides a user with a set of commands, tools and icons, which a user can graphically manipulate to generate, modify or analyze a work product in a work space area. The graphical application tool includes a graphical user interface (GUI) to provide users with a repositionable menu of available commands, tools and icons. The menu provides access to the commands, tools and device offerings without interfering with the user's work space area. In the illustrative computer-aided design (CAD) tool embodiment, the menu preferably provides a user with access to core and custom commands and circuit component offerings.

Abstract: A holographic memory system which utilizes the Talbot Effect for the lensless, near-field propagation of repeating image planes of periodic structures. Periodic phase structures at one plane in a holographic memory system are mapped to the input amplitude data plane in the holographic memory system. In a preferred embodiment, coherent light is passed through a lenslet array and propagated via the Talbot Effect to self-image coincident on a spatial light modulator that provides the holographic memory system with input data. The lenslet array is located relative to the spatial light modulator such that the desirable phase image structure is self-imaged in its Fresnel region onto the input amplitude data structure.

Abstract: Real-time hardware primitives are added to packet switches to provide efficient support for inward multicasting. The lookup table used for routing is extended by adding additional opcode and operand fields into the routing table and by including ALU circuitry to process these fields and corresponding fields in the arriving cells. Memory word widths can be extended with minimal additional chip count and the ALU can be a small addition in a header processing VLSI, thereby giving only a modest increase in complexity. By including real-time processing in the switch it is possible to solve the ACK implosion problem associated with high-speed reliable multicasting transport protocols. By keeping the primitives as general as possible, other applications can benefit as well from these real-time primitives.

Abstract: A bus master controller comprising a plurality of logic modules, each module coupled to a separate bus driver circuit. The logic module operates using a "break-before-make" protocol derived from a finite state machine, delay element and exclusive-OR gate. The finite state machine generates a predetermined sequence that requires an "assert" signal to always be delayed with respect to a "de-assert" signal, thus eliminating the possibility that more than one set of bus drivers will be coupled to the bus at any one time.

Abstract: A predistortion technique for adding a controlled amount of distortion to a radio-frequency (rf) drive signal of a laser in a lightwave transmitter. The magnitude of the added distortion approximates the distortion inherently produced by the laser. Additionally, the phase of the added distortion is substantially 180 degrees different from the distortion produced by the laser. Hence, the added distortion effectively cancels the distortion produced by the laser. The lightwave transmitter comprises a signal conditioner, a predistorter, a high-power rf amplifier circuit and a laser. The signal conditioner processes rf signals received from an rf input circuit. The processed rf signals are passed to the predistorter, which splits the rf signals into two portions. One of the split portions, which includes a major amount of the rf signal, passes through a delay circuit to an input of the combiner. The other split portion passes to diode circuits that selectively generate second- and third-order distortion products.

Abstract: A cordless telephone base unit includes a registration unit adapted to selectively register with a handset according to at least one predefined criterion, a call handling unit adapted to handle an incoming call when the handset is registered with the registration unit, and a call forwarding unit adapted to forward an incoming call to a forwarding number when the handset is not registered with the registration unit.

Abstract: The present invention provides a power micromagnetic integrated circuit having a ferromagnetic core, a method of manufacture therefor and a power processing circuit employing the same, that includes: (1) a substrate; (2) an insulator coupled to the substrate and (3) a metallic adhesive that forms a bond between the insulator and the ferromagnetic core to secure the ferromagnetic core to the substrate.

Abstract: An accurate and simplified method of non-destructively measuring the zero-dispersion wavelength along the length of a single-mode fiber is disclosed. The method includes the steps of measuring the FWM intensity of the optical fiber at a plurality of wavelengths, plotting the measured FWM intensity at each of the plurality of wavelengths to obtain a curve representative of the FWM intensity of each of the plurality of wavelength, and performing a non-linear inversion on the curve to obtain the zero-dispersion wavelength along the length of the fiber.

Abstract: A universal panel for receiving cabling components is disclosed. The panel includes a plurality of panel segments that are interconnected to form panel modules. The panel modules are interconnected to provide a panel of any desired length, extending from the floor to the ceiling if desired. A panel segment includes a first alignment feature and a second alignment feature. The first and second alignment features are disposed to engage a second alignment feature and a first alignment feature, respectively, on a second panel segment to form a panel module. Each panel module includes a coupler and a receiver. The coupler of one panel segment is disposed to engage the receiver of the other panel segment. Each of the panel segments further includes a first alignment feature and a second alignment feature. The first alignment feature of one panel segment is disposed to engage the second alignment feature of the other panel segment.

Abstract: A technique for synchronizing the timing signals in the base stations of a wireless telecommunications system is disclosed. In accordance with the illustrative embodiment of the present invention, each base station derives the frequency of its timing signal from one periodic signal, but the phase of its timing signal from a second periodic signal. In general, the base station derives its timing signal based on: (1) the frequency of a reference timing signal, and (2) the phase of a feedback signal. The reference timing signal can be obtained from a common timing source or from different timing sources which are designed to have the same frequency. The feedback signal is advantageously the confluence of two feedback loops. In accordance with the first feedback loop, the feedback signal is based on the phase of the base station's own timing signal. In accordance with the second feedback loop, the feedback signal is based on the phase of the timing signals from one or more nearby base stations.

Abstract: A method is presented to enable the impulse response of a channel to be identified when the received signal contains a large amount of quantization noise. A probabilistic estimate of the distribution of the quantization noise is subtracted from the summation of the products of the received training signal samples and tap coefficients to provide a more accurate error signal for the adjustment of the tap coefficients.

Abstract: A network interface unit with a base is disclosed and has a plurality of modular layers mountable on each other in a consecutive manner with each layer having provisions for being hinged. The first modular layer folds over the base and the second modular layer folds over the first modular layer in a manner so as to provide a compact network interface unit.

Abstract: A wireless terminal and auxiliary system are disclosed that enable the wireless terminal to determine its location based on signals transmitted from navigation satellites. In particular, the tasks of signal acquisition and signal processing required of a wireless terminal in the prior art are divided between the wireless terminal and the auxiliary system in accordance with the illustrative embodiment. The auxiliary system assists the wireless terminal by acquiring information about the satellites' ephemerides, by partially processing it and by transmitting the partially processed information to the wireless terminal in a form that is useful to the wireless terminal. The wireless terminal then uses the partially processed information from the auxiliary system to assist the wireless terminal in acquiring the ranging signals from the navigation satellites quickly and when they are weak.

Abstract: An apparatus and method employs a First In, First Out (FIFO) buffer to separate a first logic block operating at a first rate, such as 33.75 MHz, from a second logic block operating at a second rate, such as 27 MHz, which is lower than the first rate. The dual port FIFO operates with asynchronous Read and Write ports, and the Write port controls the input of data from the first logic block at the first rate to the FIFO. The FIFO provides a value indicating that the FIFO is full. Enablement of the Read port is based upon the presence of data in the FIFO and a synchronization signal for the data. Once enabled, the data is transferred from the FIFO to the second logic block at the second rate. A flag value of the FIFO is set when the FIFO buffer is full, and is used by the first logic block to interrupt data transfer into the FIFO at the first rate to allow data provided at the FIFO output at the second rate to empty the FIFO buffer.

Abstract: The present invention strengthens authentication protocols by making it more difficult for handset impersonators to perform call origination using replay attacks. The present invention accomplishes this goal by using the most significant digits of a telephone number being dialed as a parameter for determining authentication codes. Using the most significant digits makes it more difficult for impersonators to successfully use replay attacks on call origination, wherein the replay attacks involve the appendage of digits to a telephone number to be dialed.

Abstract: A low crosstalk connector configuration includes a terminal face, and at least three pairs of elongated parallel electrical connector terminals, wherein each pair is aligned in a plane normal to the terminal face. A first pair of terminals is aligned in a plane parallel to a second plane in which a second pair of terminals is aligned. A first distance between midpoints of the first and the second pairs of terminals in a direction parallel to the first and the second planes, equals a second distance between the midpoints in a direction perpendicular to the first and the second planes. A third pair of terminals is aligned in a third plane perpendicular to the first and the second planes. The third plane coincides with a point between either of the first or the second pair of terminals. A cable and connector assembly includes a length of cable with at least three pairs of twisted wires, with each wire pair connected to a corresponding pair of the connector terminals.

Abstract: A hand tool for compressing a "Hollow D" gasket against an edge surface of a panel, door or cabinet frame including a handle, and also including a stepped-roller having a raised section for applying direct pressure substantially only at the central area of the gasket overlying the adhesive strip on its back surface, and not to its side areas, for allowing thorough wetting of the adhesive along the edge surface to be secured.

Abstract: An expandable enclosure with a base having a stationary section and a sliding section. The stationary section has a pair of side edges, each of which has elongated guide tracks formed thereon. The sliding section similarly has a pair of side edges each of which has a second set of elongated guide tracks which slide matingly with the first elongated guide track such that the base can be enlarged by sliding the sliding section relative to the stationary section from a closed position into an expanded position. A preferred embodiment of the invention has a door or cover having a stationary section and a sliding section.

Abstract: Techniques for predicting RF signal propagation in indoor environments are disclosed. A typical technique comprises six distinct phases. In one phase, the mean wall separation, d, of one floor of a building is estimated. In a second phase, a reflection coefficient, s, is estimated for the floor in general. In a third phase, a number of trial RF propagation measurements are made to gather empirical data about the RF propagation characteristics of the floor. In the fourth phase, the mean wall separation, d, the reflection coefficient, s, and the trial RF propagation measurements are fit, using well-known techniques, into a wireless propagation model, such as ##EQU1## where P(r) is the measured or predicted power at a distance, r, from the transmitter, ##EQU2## and .xi. is the parameter that is fit to the empirical data.