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| Number | Title | Issue Date |
| 4918031 | Processes depending on plasma generation using a helical resonator Anisotropic plasma etching is accomplished utilizing a helical resonator operated at relatively low gas pressure. The use of this combination yields an extremely high flux of ionic species with resulting rapid anisotropic etching. A helical resonator in c... | 04/17/1990 |
| 4916522 | Integrated circuit package using plastic encapsulant An integrated circuit package uses an encapsulant frame which prevents the encapsulant used to seal the integrated circuit chip from the ambient atmosphere from flowing to unwanted areas and to permit the encapsulant to be deposited with a controllable de... | 04/10/1990 |
| 4879519 | Predistortion compensated linear amplifier A distortion compensation circuit for power amplifier producing a prescribed distortion component receives an input signal having at least one carrier therein in a prescribed frequency range. The input signal is applied to a first circuit path having an a... | 11/07/1989 |
| 4875206 | High bandwidth interleaved buffer memory and control A high capacity metropolitan area network (MAN) is described. Data traffic from users is connected to data concentrators at the edge of the network, and is transmitted over fiber optic data links to a hub where the data is switched. The hub includes a plu... | 10/17/1989 |
| 4849684 | CMOS bandgap voltage reference apparatus and method An improved CMOS bandgap voltage reference in which a magnified current derived from a thermal voltage reference produces a voltage drop across a resistor. The resistor in turn couples to a single bipolar transistor which is part of the thermal voltage re... | 07/18/1989 |
| 4842626 | Process for making optical fibers 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 te... | 06/27/1989 |
| 4835113 | Fabrication of dielectrically isolated devices with buried conductive layers In dielectrically isolated devices a buried conducting layer adjacent to the dielectric layer is produced by a drift effect. In particular, if arsenic antimony and/or phosphorus is present in the silicon dioxide layer, it is caused to drift from this laye... | 05/30/1989 |
| 4832789 | Semiconductor devices having multi-level metal interconnects A self-assigned, self-planarized metallization scheme for multilevel interconnections using self-aligned windows in integrated circuits is described. Trenches are etched into a dielectric and then, using an etch stop layer on top of the dielectric to prev... | 05/23/1989 |
| 4826278 | Optical fiber cable including a plurality of multifiber units within a single tube and methods of making An optical fiber cable (20) includes a core (21) comprising a plurality of units (22--22). Each unit is formed by a plurality of optical fibers (24--24) which are assembled together without intended stranding. The plurality of units are enclosed in a comm... | 05/02/1989 |
| 4810325 | Liquid-phase-epitaxy deposition method in the manufacture of devices Epitaxial layers are grown from a body of molten material which includes flux and layer constituent components; included in the flux are lead oxide and a small amount of boron trioxide. As compared with prior-art processing in the absence of boron trioxid... | 03/07/1989 |
| 4806997 | Double heterostructure optoelectronic switch A double heterostructure opto-electronic device capable of both electronic and photonic switching is described.... | 02/21/1989 |
| 4802723 | Optical fiber tap Light guided by an optical fiber is tapped by bending the fiber, and substantially surrounding a portion of the fiber with a tube that couples a portion of the optical energy to a detector. The tube can be bent to increase the efficiency of collection of ... | 02/07/1989 |
| 4797386 | Superconductor-magnet induced separation Separation between a magnetized member and a Type II superconducting member inherently manifestets stability in separation distance, in lateral direction and in attitude. Uses include levitation of fixed and moveable members as well as superconducting bea... | 01/10/1989 |
| 4791628 | High-speed demultiplexer circuit A demultiplexer for demultiplexing a multiplexed input data signal into M output channels using M sequencer means clocked from an overlapping M phase system clock. The system clock operates at a frequency equal to the input data signal rate divided by M. ... | 12/13/1988 |
| 4788718 | Call data collection and modification of received call distribution An arrangement and method for compiling telecommunication traffic analysis data includes the steps of collecting call data for a plurality of calls to a single customer from a signaling circuit that commonly carries the signaling for calls to a plurality ... | 11/29/1988 |
| 4759374 | Non-invasive blood flow measurements utilizing cardiac cycle synchronization A system for non-invasively determining the amount of blood flow by performing an autoregressive analysis of Doppler shifted acoustical signals resulting from reflected ultrasonic signals from blood cell movement within internal blood vessels. Each cardia... | 07/26/1988 |
| 4752924 | Ring packet switch A data communication network comprising a plurality of nodes interconnecting transmission paths in a ring structure arranged to propagate data messages between data systems coupled to the network by the nodes in opposite directions around the network ring... | 06/21/1988 |
| 4719591 | Optimization network for the decomposition of signals A network comprising analog amplifiers with a resistive interconnection matrix that connects each amplifier output to the input of all other amplifiers. The connections embodied in the matrix are achieved with conductances whose values are computed in acc... | 01/12/1988 |
| 4712858 | Lightguide access port An access port assembly (10) for a main lightwave transmission fiber (16) is made by machining a notch (26) into it by carbon dioxide laser nibbling to form notch faces (28, 30) which extend into the core region (18). The end face (32) of a second, receiv... | 12/15/1987 |
| 4712077 | Tristate phase-lock loop prevents false lock A phase-lock loop includes a tristate phase detector, a filter and a voltage-controlled oscillator connected in a loop for regenerating clock signals in response to a sequence of data signals applied to the input terminal of the tristate phase detector an... | 12/08/1987 |
| 4695977 | Control of real-time systems utilizing a nonprocedural language A telecommunication system for the switching of voice and data controlled by a computer executing a nonprocedural language that allows for the explicit control of interaction between features by the program scripts executing the programs. The program scri... | 09/22/1987 |
| 4680810 | Means for controlling a semiconductor device and communication system comprising the means The novel technique for stabilizing an electronic device, e.g., a semiconductor laser, is disclosed. The technique can advantageously be used to stabilize the bias current of such a laser at or near the lasing threshold of the device. A preferred applicat... | 07/14/1987 |
| 4679232 | Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed When a floating battery feed circuit is used to power telephone lines, it is desirable to provide an anti-corrosion biasing circuit to keep the voltage on the tip and ring conductors from becoming positive. This can be done using an anit-corrosion circuit... | 07/07/1987 |
| 4659175 | Fiber waveguide coupling device According to this invention, a coupler or coupling tool is proposed with active alignment of one fiber with respect to another in both planes of interest, i.e. the vertical position and the lateral position. A key feature of the alignment means is that as... | 04/21/1987 |
