Abstract: A system and method, operable on a general purpose computer, for debugging software that is to control a digital signal processor ("DSP") and a general purpose computer employing either the system or the method. The present invention is employable with either a real DSP or an emulated DSP.

Abstract: A hinged mask and a method for its use in manufacturing MEMS device are disclosed. According to the invention, the hinged mask and a portion of the MEMS device are formed at the same time on a support. Openings are formed in the mask, the openings defining a pattern that is transferable in the form of a patterned layer. After release of the MEMS device, the hinged mask is rotated out-of-plane about 180.degree. to lie on top of the MEMS device. The hinged mask is used as a micro-sized shadow mask to deposit a patterned film of arbitrary composition on the MEMS device. Since the hinged plate is formed by the original lithography, it is aligned to the MEMS device with a high degree of accuracy.

Abstract: A semiconductor device and a method of manufacture therefor. The semiconductor device includes: (1) a substrate having a recess therein, (2) an aluminum-alloy layer located over at least a portion of the substrate and filling at least a portion of the recess and (3) a protective metal layer at least partially diffused in the aluminum-alloy layer, the metal protective layer having a high affinity for oxygen and acting as a sacrificial target for oxygen during a reflow of the aluminum-alloy layer.

Abstract: A unique time slot is assigned to each of a plurality of wavelengths emitted by a single, centralized wavelength division multiplexed optical source to provide a "bit interleaved" WDM signal. In accordance with an illustrative embodiment of the present invention, the thus-developed bit-interleaved WDM signal is replicated in cascaded stages of amplification and power splitting before data is encoded for respective frequency dependent receivers as, for example, a plurality of passive optical networks. Because the output of the optical source need not be encoded with data for the respective receivers until after many stages of splitting and amplification, a small number of time division multiplexing (TDM) modulators synchronized to the source may be used to deliver data to potentially tens of thousands of subscribers.

Abstract: For use with a power factor correction circuit, a current mode controller, a method of operating current mode control to achieve power factor correction thereof and a power supply incorporating the controller or the method. In one embodiment, the controller includes: (1) a modulator, coupled to a switch in the power factor correction circuit, that senses an electrical characteristic and a current passing through the power factor correction circuit and provides, in response thereto, a control signal to the switch and (2) a compensation circuit, coupled to an input of the power factor correction circuit, that provides a compensation signal to the modulator that is a function of a rectified line voltage provided to the input of the power factor correction circuit. The compensation signal causes the modulator to modify the control signal to reduce a total harmonic distortion (THD) of the power factor correction circuit.

Abstract: A high quality oxide layer has been formed on a GaN surface by a method that involves preparation of the GaN such that the surface is essentially atomically clean and essentially atomically ordered, and that further involves exposing the surface to evaporant from a GGG (gallium gadolinium garnet) evaporation source. MOS structures comprising the GaN/oxide combination have shown low leakage current, as well as charge accumulation and depletion.

Abstract: Apparatus and methods are provided for adaptively decoding communication signals. A received input signal, representing a communication between a first node and a second node, is processed to produce an output signal. The received input signal includes a desired data signal and at least one interfering signal. The desired data signal includes at least one data set and is preferably encoded using one of a linear combination code and an algebraic combination code. The input signal is processed by identifying at least a portion of the desired data signal within the input signal and isolating the desired data signal with respect to the one or more interfering signals to produce the output signal. The output signal represents the desired data signal.

Abstract: A DC termination device particularly adapted for use in a device coupled to a two wire telecommunications system. The termination device controls the tip-to-ring current through the telecommunications device by means of a voltage controlled current source. The control voltage for the voltage controlled current source is provided by digital signal processing of the tip-to-ring voltage such that the tip-to-ring current is linearly proportional to the tip-to-ring voltage when the voltage is below a specified threshold level, but is maintained constant when the tip-to-ring voltage is over the threshold voltage. Preferably, the constant current is the minimum adequate current needed for operation.

Abstract: A network for multi-bit word parallel communication between optoelectronic chips on a two dimensional array of optical input and output channels carried on a single dimension of optical fibers. Each bit of a word is carried on a different wavelength and the multiple wavelengths carrying a word are wavelength multiplexed onto a single optical fiber. Multiple fibers can be joined into a one dimensional array of fibers. A transceiver for transmitting and receiving along the optical data channels comprises an array of modulators powered by individual wavelength light beams, either from individual monochromatic light sources and a light beam from a single broadband light source made to pass through a diffraction grating. The modulators are positioned so that each modulator reflects a different wavelength light beam, thereby providing multiple optical channels. Alternatively, multiple wavelengths are generated from CMOS integrated light sources.

Abstract: A fiber optic distribution cable including, in one aspect, a core tube with at least one optical fiber, at least one electric power conducting member extending alongside the core, a contiguous layer formed of a plurality of strength members, and a plastic jacket. In another aspect, the cable includes a core of at least one optical fiber member and at least one electrical power conducting member encased in a strength member contiguous layer and a plastic outer jacket. Both embodiments include water locking means.

Abstract: An apparatus and method are disclosed for use in detecting and localizing electrostatically susceptible areas of electronic systems. An exemplary apparatus includes: (1) an ESD gun for providing a source of electric current; (2) a wire coil for generating a magnetic field; and (3) a shielded transmission line, such as a coaxial transmission line ("coax"), for receiving current from the gun. The center conductor of the coax is coupled at one end to the gun and at the other end to one end of the wire coil. The other end of the wire coil is coupled to ground. The current flowing through the wire coil creates a magnetic field, which is bi-directional and orthogonal to the plane of the coil. The magnetic field causes errors in the operation of the system under test when the coil is placed in close proximity with ESD susceptible system components. As such, components that are ESD susceptible can be easily detected and localized.

Abstract: The adaptive sequential pattern memory search technique only examines the contents of a subset of the total number of memory locations in each search for information representative of a character string. The subset includes a plurality of storage locations and each examination is performed in one concurrent read operation. If the character string is not matched, the memory must be updated to store information representative of the unmatched string. This updating process selects one location from the subset for storing this representative information. Advantageously, an indicator of when each stored representative information last matched a character string is maintained and utilized in the selection process. In addition, to avoid operational errors associated with outputting invalid information from the "child" of a previously discarded "parent", an indication of the time each stored entry is created is utilized to remove such invalid information as it is detected in the updating process.

Abstract: A private wireless system is configured for providing a call hand-off capability for a mobile station communicating with a private base station operating in the wireless system. The call in the wireless system is handed off to the public cellular system whenever the mobile station is moved near the fringe of the coverage area provided by the private base station. Once the hand-off is initiated in the private base station, a process is executed in which the private base station and a local exchange carrier cooperatively switch an active call from an existing wireless communications path established between the private base station and the mobile station to a newly created wireless communications path established between the mobile station and a public base station in the cellular system.

Abstract: A demodulator of a Code Division Multiple Access Receiver (CDMA) provides single user pilot code aided coherent demodulation of QPSK/CDMA signals using a switch and squarers instead of multipliers. Additionally, a coherent Multicode (MC) CDMA demodulator with a switch for sharing pilot and data correlator results is presented. This change in the demodulators reduces by one-half the number of additions required in the accumulator part for both, the CDMA and the MC-CDMA receiver.

Abstract: A method of decoding a sequence of samples received over a communications channel, such as a partial response channel, in which the sequence represents a length k binary bit stream encoded as a sequence of bipolar symbols comprised of q groups of L symbols, each length L group of said symbols corresponding to one of 2.sup.m subwords having a predetermined block digital sum. The decoding method makes use of the structure of the encoding method by finding, in one illustrative embodiment, for each group of L samples, the maximum likelihood path through a time varying trellis supporting the sets of subwords having predetermined block digital sums to identify said subwords; recording the state metrics and branch metrics for each path and identifying, from the metrics the maximum likelihood path, the order of concatenation of the subwords.

Abstract: A subassembly for coupling a laser to an optical fiber comprises a substrate having an asymmetrical, pyramidal cavity, a spherical lens located in the cavity, and a semiconductor laser positioned on the substrate. The output face of the laser is located along an edge of the cavity (without overhanging the edge), and its active region is aligned with the center of the lens along the optic axis of the subassembly.

Abstract: A method and apparatus for testing a customer premises equipment (CPE) alert signal detector used to detect the start of a Caller ID data transmission using test CPE alert signals generated by a testing platform and mixed with a voice signal as an input to the detector. The testing platform also generates a special sync signal which is input to control circuitry connected to the CPE alert signal detector. An active sync signal indicates when a valid CPE alert signal should be detected. The control circuitry is configured to execute a test algorithm that monitors both the sync signal and the output of the detector and indicates when the CPE alert signal detector has validly detected a CPE alert signal, falsely detected a CPE alert signal, or failed to detect a CPE alert signal. The number of valid, false, and missed CPE alert signal detections are totaled and can be used to calculate the talkoff and talkdown error rates for the detector.

Abstract: An enclosure having a base and a cover defining a chamber used to hold telecommunications hardware for splicing and/or connecting to a cable can be expanded in volume by removing the cover from the base and mounting a mid layer between the base and the cover. Depending on whether or not the mid layer is configured with a mounting plane, the expanded enclosure will have either a single larger chamber (i.e., mid layer without a mounting plane) or two chambers (i.e., mid layer with a mounting plane). In either case, the enclosure can be expanded in the field without dismounting the base or even disturbing any of the electrical connections housed within the base.

Abstract: Disclosed is a method for making the transition from a hybrid network into an all fiber network. In the preferred embodiment, the first step is to replace an existing fiber optic/coaxial cable conversion device located at a remote node with an optic distribution device. Secondly, a house optical network unit is installed in a living unit. Finally, a downstream optic fiber is installed between the optic distribution device and the house optical network unit.