Abstract: A gate electrode having an insulating top layer as well as insulating sidewall spacers permits the source and drain regions to be electrically contacted through windows directly above the source and drain regions formed in a window pad layer. The window pad layer may also be used as a sublevel interconnect.

Abstract: A rectifier plant controller is combined with a continuously operating feeder monitor option in order to provide feeder line data on demand. The feeder monitor option continuously monitor feeder lines selected by the rectifier plant controller and stores the data acquired in a memory accessible to both the feeder monitor option and the rectifier plant controller. The rectifier plant controller can recover the data upon request at any time.

Abstract: In accordance with one embodiment of the invention, a process for interconnecting the circuitry of two substrates comprises the step of terminating the circuitry on bonding pads that are arranged in parallel rows with the first row of each substrate being nearest an edge of the substrate. The bonding pads of the two first rows of the two substrates are joined by conductors of a dielectric tape that bridges the two substrates. The conductors overlap the edges of the dielectric tape and are organized to permit them to be bonded to corresponding bonding pads of the two substrates, for example, by soldering. The two second rows of bonding pads are joined by conductors on a second dielectric tape which is wide enough to cover two first rows of bonding pads and thereby provide electrical insulation.

Abstract: The computational processing power of a Digital Signal Processor (DSP) in linear-phase Finite Impulse Response Filter (FIR) applications is essentially doubled by taking advantage of either the even (symmetrical) or odd (antisymmetrical) symmetry of the response of such a filter.

Abstract: An arrangement for modifying an information carrying radiant energy beam array in which occurrences of a first prescribed pattern of radiant energy beams in the array are detected by producing images of said beam array and shifting the images relative to each other responsive to a first prescribed pattern. The shifted images are superimposed and a radiant energy beam array is formed that identifies the occurrences of first prescribed patterns in the superimposed images. A plurality of images of the identifying beam array are produced and shifted relative to each other in accordance with a second prescribed pattern. The shifted images of said occurrence identifying beam array are superimposed to form the modified beam array. The modifications may comprise arithmetic processing, pattern or image processing or Turing machine type processing.

Abstract: The extent of loss produced in fibers due to the presence of OH infrared absorption bands is significantly reduced through the use of specific expedients during, for example, the preform collapse procedure. In particular, during this procedure a carbon tetrahalide composition is employed to essentially prevent the presence of any residual hydrogen-containing entity from influencing the quality of the preform and thus from influencing the quality of the fiber ultimately produced.

Abstract: The present invention relates to a N.times.N single-mode optical coupler employing evanescent wave coupling between mutually adjacent optical waveguides sufficiently close to one another to facilitate coupling among all the waveguides. An optical signal of a narrow frequency band, e.g. appreciably less than 100 gigahertz, introduced to an input port of one of the waveguides is found to be nonuniformly distributed among the output ports of the coupler. A first embodiment uses the nonuniform distributions of narrowband optical signals to the output ports of the coupler to enable the present invention to be used as essentially a selective switching device. A second embodiment introduces one or more predetermined broadband optical signals to one or more input ports of the coupler to produce an appreciably uniform power distribution among the output ports of the coupler.

Abstract: An optical fiber organizer and splicing arrangement permits storage of variable lengths of surplus fiber. The organizer has a pair of separated cylinders extending from a first rectangular section of a base plate and a splice tray having opposite entrance sides for optical fiber in a second rectangular section. Each cylinder has a prescribed height permitting wrapping of multiple loops of fiber around the cylinder circumference and a diameter determined by the fiber bend radius restriction. The splicing tray is spaced from the base plate to permit passage of optical fiber underneath the splicing tray. The surplus fiber is directed around one or both cylinders and underneath the splicing tray through a plurality of different length passageways so that the varying lengths of optical fiber are stored. Clockwise, counter clockwise and figure eight loops are used so that each optical fiber end is directed to predetermined entrance side of the splicing tray without exceeding the fiber bend radius restriction.

Abstract: Incorporation of fluorine into a porous silica body, such as an unsintered body produced by a sol-gel method, by VAD or OVPO, reduces or eliminates bubble or pore formation upon re-heating of the glass formed by sintering of the porous material. Effective fluorine concentrations are between 0.01 and 5% by weight. The invention can be used advantageously in producing preforms and optical fiber.

Abstract: The fabrication of a printed circuit board (26) usually includes the step of testing the board with a testing machine (24) to verify operability. The testing machine accomplishes such testing by transmitting test signals to the board via a transmission line (36) and then analyzing each response signals returned from the board in response to the test signals. To reduce the incidence of error, the testing machine (24) is compensated for the propagation delay of the line (12) which is measured by launching a first string of pulses into one end of the line whose opposite end is left open. A second string of pulses is simultaneously launched into a programmable delay line (16) which delays each second pulse by an adjustable interval. After the generation of each first and second pulse, a check is made whether the first pulse has been reflected back to the first end of the transmission line at the same time the second pulse reaches the output of the delay line.

Abstract: A local area data distribution system includes a plurality of data processing stations connected to a common bus. Individual data processing stations contend with each other for access to the bus while the bus is held at a predetermined and controlled but overridable logic state by applying their priority code bit by bit to the bus and comparing the logic state of the bus with the bit they are applying thereto. A biasing arrangement holds the bus at the predetermined and controlled logic state during the contention interval at a signal level that may be easily overridden by an output of any one of the individual data processing stations.

Abstract: A determination of whether each of a pair of interconnected nodes (22) on a circuit board (12) is connected to a corresponding one of a pair of nodes (28) on a translator board (14) via a test fixture pin (18) is had by coupling one of the translator board nodes to circuit ground. The other of the pair of nodes on the translator board is coupled to the gate of a field effect transistor (FET) (34) whose gate-to-source portion is shunted by a capacitor (38). The drain-to-source portion of the FET (34) is coupled in series with a resistor (36) between circuit ground and a voltage source supplying a potential below ground potential. When continuity exists between each of the pair of nodes (22 and 28) and each of the pair of pins (18), the FET(34) conducts, causing the voltage across the resistor (36) to change. By monitoring the voltage across the resistor (36), an indication can be had as to whether continuity exists.

Abstract: A method and apparatus for accessing data in a data base that provides for a minimum of unused storage while preserving easy expandability. A group of accessing keys are used to identify the attributes data that is being sought in a data base. In accordance with the invention, subkeys are extracted from members of the group of data accessing keys and these subkeys are advantageously rearranged to form derived accessing keys. Subkeys are densely populataed if most values of a subkey are used in most systems. One of the derived accessing keys, derived from densely populated subkeys is used for accessing the tables of data attributes that are therefore advantageously densely populated. Another derived accessing key, derived from sparsely populated subkeys, is used for accessing a sparsely populated head table. Derived keys of intermediate population density are used for accessing tables intermediate between the head tables and the tables of data attributes.

Abstract: A compressible thermally conductive member comprises a polymer field with thermally conducting magnetically aligned particles comprising a base portion and a multiplicity of protrusions extending from at least one surface of the base portion.

Abstract: A skew compensation circuit removes skew between a data stream and the clock of a processing module to which the data stream clocked at the same frequency is applied. A delayed data stream is generated. Either the data stream or the delayed data stream is selected to be clocked in the processing module. The selected data stream and a delayed version of the selected data stream are compared at prescribed transitions of the processing module clock to detect differences between the state of the selected data stream signal at the clock transition and the state of the delayed selected data signal. In the event of a detected difference in states, the other of the input data stream and the delayed data stream is selected for clocking in the processing module.

Abstract: A method of fabricating a dielectrically-isolated structure is disclosed rein the structure includes a layer of silicide which is selectively doped, preferably using an ion implantation process. The doped silicide is then used as the diffusion source for the subsequent formation (through a heat treatment) of various active portions (collector, emitter, drain, source, for example) of a variety of high-voltage, high-speed active devices. The non-doped silicide is advantageously utilized as a low-resistance contact between the buried diffusion region and the surface electrode. In an alternative embodiment, bottom portions of the silicide contiguous to the tub are removed, leaving only vertical silicide portions adjacent to the sidewalls of the dielectrically isolated tub.

Abstract: A high frequency test fixture (40) comprises an array of Euler column probes (57,58,59) positioned between a circuit board or substrate under test (41) and a routing board or substrate (42) connected to an electronic tester. The Euler column probes are held in a compliant conducting medium (53) interposed between the circuit under test and the routing board. Electrical insulation (67,68) is placed around each alternate probe of the array of probes to isolate it from the compliant conducting medium. Such an alternate probe is to be used as a test signal driving probe. The probes adjacent to and surrounding a test signal driving probe are in electrical contact with the compliant medium and are to be used as ground probes. A high frequency test signal applied to the circuit under test via one of the alternate probes follows a return current path along the outside perimeter of the compliant medium thereby substantially reducing noise and effective lead inductance of the test fixture (FIG. 2).

Abstract: A semiconductor device which includes either a single semiconductor chip bearing an integrated circuit (IC) or two or more electrically interconnected semiconductor chips, is disclosed. This device includes interconnects between device components (on the same chip and/or on different chips), at least one of which includes a region of superconducting material, e.g., a region of copper oxide superconductor having a T.sub.c greater than about 77K. Significantly, to avoid undesirable interactions, at high processing temperatures, between the superconducting material and underlying, silicon-containing material (which, among other things, results in the superconducting material reverting to its non-superconducting state), the interconnect also includes a combination of material regions which prevents such interactions.

Abstract: A business communication system serving a plurality of telephone station sets is provided with a station-to-station messaging facility integrated therewith. The operation of the station-to-station messaging facility is invoked when a user at a station set enters a respective feature code. Thereafter, responsive to a series of prompts, the user enters a code identifying the predefined textual message that he/she desired to send and enters the identity (telephone number) of the receiving station, the receiving station being one that is equipped with a display. The station-to-station messaging facility responsive thereto translates the code into its respective predefined message and sends the message with the identity of the sending station to the receiving station for display thereat.

Abstract: An optical fiber cable (20) includes a core (21) comprising plurality of units (22--22). Each unit is formed by a plurality of optical fibers (24--24) which are assembled together without intended stranding. Each of the optical fibers includes a core, and inner and outer claddings with the inner cladding characterized by an index of refraction depressed from that of the outer cladding. The ratio of the inner cladding diameter to the core diameter and the ratio of the difference in the indices of refraction of the inner and outer claddings to the difference in indices of refraction between the core and the inner cladding are such that each optical fiber is capable of operation in a single mode fashion at a predetermined wavelength. Also, the difference between the indices of refraction of the core and the inner cladding is sufficiently high to cause each fiber to be substantially insensitive to microbending.