Abstract: The present invention provides a van der Pauw semiconductor test structure for and a method of testing a resistivity of a doped area formed within a substrate of a semiconductor wafer which may be under a diffusion area or a gate structure. The test structure can include field oxide regions formed on a surface of the substrate and a base doped substrate formed within the substrate. Further, the test structure includes a first primary tub and secondary tubs that are formed within the base doped substrate, each of the secondary tubs having a first diffusion region formed adjacent to an inner isolation structure and a second diffusion region formed adjacent to an outer isolation structure. A second primary tub is located adjacent the first primary tub and a dielectric layer is formed over the substrate having contacts formed within the dielectric layer and between the isolation structures.

Abstract: A single stage power converter, a method of processing rectified AC power, and a power supply incorporating the converter or the method. In one embodiment, the converter is couplable via a rectifier to a source of AC power, has a filter capacitor and an isolation transformer with a primary winding, and includes: (1) a significant energy storage device coupled to the primary winding, (2) a first switch, coupled to the primary winding, that conducts intermittently to couple the primary winding to the rectifier to transfer a portion of rectified AC power to a magnetizing inductance of the isolation transformer and (3) a second switch, coupled between the primary winding and the significant energy storage device, that conducts alternately with the first switch, the first and second switches substantially zero-voltage switching and the converter correcting a power factor of the AC power.

Abstract: The present invention is directed to a device that has wires on at least two levels. The wires are either copper or a metal containing copper. At lease one via plug formed of copper or a metal containing copper is formed which electrically connects at least one wire on the first level with at least one wire on the second level. The device is fabricated under conditions that remove oxides and other metal that form on the exposed surface of the first level of metal during processing prior to the via plug being formed. The resulting interconnect between the first level of metal and the via plus is substantially non-oxidized copper or copper-containing metal.

Abstract: A line interface unit terminates individual subscriber lines and supports conventional telephone service and high speed data service. It provides an interface between subscriber customer premises equipment and central office equipment. The use of large diplex filters is not required in order to terminate subscriber lines at the central office while providing high speed data services.

Abstract: A system is provided for trimming excess vinyl film from a hoop assembly. The hoop assembly may be used to manufacture semiconductor workpieces. The system uses a pressure applying member applied to the excess film with a bearing surface sufficient to receive such pressure on the opposite side of the excess film. The system may be rotated such that the film is trimmed around the entire hoop assembly at the position of the pressure applying member. The bearing surface may be part of the support for the system or incorporated into the hoops.

Abstract: In a system for simulcasting digitally modulated and analog FM signals over the same FM frequency band, the effect of the analog FM signal on the digitally modulated signal in the simulcast is calculated and canceled from the latter signal before its transmission. As a result, the digital transmission is free from interference from the analog FM signal. Moreover, the digital transmission is designed in such a manner that the interference caused thereby to the analog FM signal is kept at a minimal level.

Abstract: A cellular communication signal receiver receives a desired signal in the presence of at least one co-channel interference signal. The receiver comprises a channel estimator configured to receive a plurality of training signal samples to estimate the finite impulse response to the desired signal and the co-channel interference signal. The finite impulse response estimates having a predetermined number of channel taps defining the length of the desired channel and the length of co-channel interference channel. A Viterbi decoder is coupled to the channel estimator, and configured to receive the desired and co-channel interference signals. The channel estimator generates channel tap estimates. A power calculator is coupled to the channel estimator and configured to estimate the power of the estimated channel taps.

Abstract: An optical switch having a straight waveguide core with a lateral waveguide core extending therefrom. A region of polymer material is disposed in the straight waveguide core to deflect optical waves from the first waveguide core into the lateral waveguide core depending on the relative indexes of refraction between the first waveguide core and the polymer material. The temperature of the polymer material is adjusted, thereby adjusting the index of refraction of the polymer material so as to cause the deflection in a switched state, and to allow light radiation to pass through the polymer material in an un-switched state.

Abstract: A sealable container having a container body, a cover forming a right angle movably connected to the container body, at least one alignment piece and corresponding alignment bracket, and at least one tension lock connected to the container body. When the container is closed, a conical alignment pin on the alignment bracket engages the conical hole and the tension lock engages the cover in a single action to provide alignment and sealing force to compress and seal enclosures between the cover and the container body simultaneously in two perpendicular planes.

Abstract: A monolithically-integrated SRAM cell is described for reducing the cell size, i.e., at least two of a plurality of transistors comprising the SRAM cell are monolithically integrated to define a first transistor and a second transistor, wherein the drain of the first transistor functions as the gate of the second transistor and the drain of the second transistor functions as the gate of the first transistor. This integration eliminates the need for gate-to-drain connections of previous devices.

Abstract: A building entry protection unit for interconnecting telephone lines with a regional telephone system is disclosed. The unit features a housing having a hinged frame with extending prongs for mounting wire connectors. The housing and frame form an enclosed splice chamber where the regional telephone lines are connected to the unit.

Abstract: An integrated circuit (shown below dashed line A--A) for a voltage controlled oscillator comprises a first transistor (T.sub.1) having its collector coupled to a first port (Port 1) via a filter comprising a capacitor (C.sub.f) and an inductor (L.sub.f) and its emitter coupled to the emitter of a second transistor (T.sub.2) whose collector is coupled to a second port (Port 2). The collector of the first transistor is also coupled via a capacitive divider (C.sub.1, C.sub.2) to the base of the second transistor. The base of the first transistor is AC decoupled (C.sub.3). The emitters of the first and second transistors are fed by a current source (I.sub.1). A capacitor (C.sub.s) connects the base of the second transistor to the first port. The first and second ports are for connection to an external resonator (L.sub.1, D.sub.1, C.sub.p, L.sub.p) (shown above dashed line A--A) where C.sub.p and L.sub.

Abstract: L-band EDFA (Er-doped fiber amplifier) characteristics are improved by provision of filter means in the C-band, the filter means having a figure of merit greater than 400dB.multidot.nm. The filter means can be discrete and/or distributed filter means. In preferred embodiments, two or more full C-band blazed fiber Bragg, gratings are used.

Abstract: A Wavelength-Division-Multiplexer (WDM) programmable add/drop using an interleave-chirped waveguide grating router and phase shifters in a reflective arrangement. Experimental results of a 16.times.100-GHz version in InP is presented.

Abstract: A kit for labeling connector blocks to facilitate expansion and identification of connectors in one or more connector blocks. The kit provides modified connector blocks and a system for labeling the connector blocks. The connector block of the present invention comprises a base having spaced-apart rows of connectors and a raised pedestal corresponding to each row of connectors. A first set of pre-printed sequential numbers appear on the base identifying the leftmost connectors of each row. A second set of pre-printed sequential numbers appear on each connector across each row. In a configuration where two connector blocks are placed side-by-side, the raised pedestals of the first block advantageously overlap the first set of pre-printed numbers on the second block. Each raised pedestal further provides a surface for the application of self-adhesive labels to identify the leftmost connectors of each row on the second block.

Abstract: A method and an apparatus for using fuzzy logic to determine when handovers are desirable and the extent to which the radio transmission power in a cellular telephone network should be adjusted. The mobile phone and the base transceiver station measure certain system parameters, including rate of handover, quality, distance, level, call duration, and power. These measurements are input to a fuzzifier. The fuzzifier applies standard fuzzy-set-theory membership functions to the measurements, and the fuzzifier outputs a set of fuzzy variables corresponding to the measurements. The fuzzifier outputs are input to an inference engine. The inference engine contains a set of rules that, when applied to the inference engine inputs, indicate: when a handover should be performed; when a handover should not be performed; and the amount by which, if any, the transmission power should be adjusted.

Abstract: An integrated circuit has an improved voltage regulator for use with memory devices that utilize secondary electron injection for programming. The memory device, typically a floating-gate EEPROM, has source and drain regions formed in a doped tub region. A first voltage source is used to reverse-bias a diode, formed in the same process as the source and drain regions of the memory device, to near the breakdown voltage. A small bias current flows through the reverse-biased diode from the first voltage source to a second voltage source, thereby establishing a reference voltage. The drain voltage of the memory device is then biased, typically by a bipolar transistor, to about a diode drop (about 0.7V) below the reference voltage, and hence correspondingly below the drain-to-tub breakdown voltage of the memory device. In this manner, the reference voltage tracks changes in the memory device due to process variations, temperature variations, etc.

Abstract: Fiber optic cable waste is avoided by measuring amplitude oscillations of four-wave mixing products in positive-dispersion and negative-dispersion fiber optic cable to determine the lengths of a first, positive-dispersion cable segment and a second, negative-dispersion cable segment that are used to provide a specified length of fiber optic cable having a specified amount of path-average chromatic dispersion. The integrated dispersion of a positive-dispersion fiber optic cable as a function of length is measured to provide a first set of data, and the integrated dispersion of a negative-dispersion fiber optic cable as a function of length is measured to provide a second set of data. A fiber-optic cable is simultaneously fed with two optical signals, a first at wavelength .lambda..sub.1 and a second at wavelength .lambda..sub.2, and the number of sinusoidal oscillations that occur in the four-wave mixing products of the Stokes (or anti-Stokes) sideband as a function of cable length are measured.

Abstract: An integrated circuit and its method of formation are disclosed. The circuit utilizes a spin-on glass as an interlevel dielectric. Above and below the spin-on glass is located a phosphorous doped dielectric. The doped dielectric prevents sodium from becoming mobile under the influence of subsequently applied electric fields.

Abstract: A communication connector assembly has a base support, and at least first and second pairs of terminal contact wires with base portions mounted on the base support. The free end portions of the contact wires define a zone of contact within which electrical connections are established with a mating connector, and each pair of contact wires defines a different signal path in the connector assembly. The first and the second pair of contact wires have corresponding leading portions extending from the free end portions, to a side of the zone of contact opposite from the base portions. A leading portion of a contact wire of the first pair, and a leading portion of a contact wire of the second pair, are constructed and arranged for capacitively coupling to one another thus conveying capacitive crosstalk compensation to the zone of contact where offending crosstalk is introduced by a mated connector.