Patents Represented by Attorney, Agent or Law Firm Limbach & Limbach LLP
  • Patent number: 6198711
    Abstract: An equalizer used for an optical reproducing apparatus performs an optimal equalizing operation in accordance with the spatial frequency without needing an electrical equalizer. The optical reproducing apparatus reproduces the reproducing data in the following manner. A detector is provided for receiving reflected light from a disc. The detector is divided into a plurality of light receiving areas by a line perpendicular to the light receiving direction corresponding to the disc track direction. Then, calculations are made on the outputs from the respective light receiving areas to specifically correct the spatial frequency characteristics. The calculated signal is then decoded.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: March 6, 2001
    Assignee: Sony Corporation
    Inventors: Goro Fujita, Yoshiyuki Teraoka
  • Patent number: 6197671
    Abstract: Disclosed is a MOS transistor having a polysilicon gate structure in which an overlying metal interconnect completely shorts the gate area. In one embodiment, the gate is formed from multiple fingers joined in a serpentine pattern and separated by oxide-filled spaces. Overlying the fingers and oxide-filled spaces is an interconnect comprising a first metal layer and a second metal layer. The first metal layer overlies the fingers and oxide-filled spaces and the second metal layer overlies the first metal layer. Both metal layers form a stack that simultaneously shorts the fingers. Also disclosed is a method of fabricating such a polysilicon gate structure in a MOS transistor using a series of masks. Once the gate and fingers are defined, a conformal oxide is deposited over the fingers and in the spaces between the fingers. The conformal oxide is anisotropically etched to produce a planarized profile of the fingers and oxide-filled spaces.
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: March 6, 2001
    Assignee: National Semiconductor Corporation
    Inventor: Albert Bergemont
  • Patent number: 6199206
    Abstract: A TV transmitter, a TV transmitting method, a TV receiver and a TV receiving method allowing users to find and choose desired programs through the use of a program guide displayed by graphical user interface (GUI). The TV transmitter comprises a signal generation unit for generating text data signals associated with TV broadcast programs and hyper text data signals corresponding to the text data signals, a multiplexer for multiplexing the text data signals and the hyper text data signals onto video signals of the TV broadcast programs to provide a multiplexed TV broadcast signal, and an output unit for outputting the multiplexed TV broadcast signal provided by the multiplexer.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: March 6, 2001
    Assignee: Sony Corporation
    Inventors: Hisao Nishioka, Takaaki Enomoto, Jun Ota, Chisato Kisanuki
  • Patent number: 6198645
    Abstract: A structure and process are provided for converting DC-DC voltages, which allows both buck and boost conversion utilizing a single switched capacitor array. In one embodiment of this invention, the switched capacitor array comprises multiple gain blocks, where the gain blocks are identical and stacked upon each other. The switches and capacitors are configured so that various combinations of series and parallel capacitor connections are possible, and thus both buck and boost conversions are attainable with one switched capacitor array. Other embodiments of the present invention use multiple gain blocks, configured such that the capacitor in each gain block can be connected to ground. As a result, a single charge state for a range of desired gains can be configured for use with a shared or common rest state, i.e., a capacitor configuration which is the same regardless of the desired gain.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: March 6, 2001
    Assignee: National Semiconductor Corporation
    Inventors: Jeff Kotowski, William J. McIntyre
  • Patent number: 6198722
    Abstract: A method is shown for a central node to flow control one or more end stations operating under a medium access control protocol wherein the central node transmits a signal to the end stations that causes the end stations to defer a data transmission, and wherein the central node halts the transmission to reset a protocol timer in the end stations, and wherein the central node resumes transmission before expiration of another protocol timer that would cause the end stations to commit to attempting a data transmission onto the communications medium and the end stations can thereby be held in a flow control state without loss of transmission packets.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: March 6, 2001
    Assignee: National Semiconductor Corp.
    Inventor: William Bunch
  • Patent number: 6193740
    Abstract: The eye pillows of the present invention, used for therapeutic treatment of a user's eye and accu-pressure points around the user's eye, each include a hollow shell formed of a pliable material, and a predetermined amount of particulate material having a predetermined weight contained in the shell. The amount and weight of the particulate material and the pliability of the shell are selected so that when the pillow is placed over a user's eye, the shell conforms to, fills in, and applies evenly distributed pressure to the eye socket around the user's eye, including evenly distributed pressure to accu-pressure points around the eye. The pillows can be individually applied, connected together with a strap or head band, or even removably or integrally attached to a larger pillow or mask.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: February 27, 2001
    Inventor: Andrea Janine Rodriguez
  • Patent number: 6194917
    Abstract: An apparatus for and method of reducing transistor body effect when detecting and correcting a phase error between clock signals using delay-locked and phase-locked loop circuits. The clock signals are provided to an equal number of circuit elements in cross-coupled XOR circuits. The circuit includes a transconductance circuit having at least two PMOS transistors with their substrates directly connected to their sources.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: February 27, 2001
    Assignee: National Semiconductor Corporation
    Inventor: Dan Zhichao Deng
  • Patent number: 6195387
    Abstract: The running real time length of combined video and audio signal programs is shortened or lengthened by deleting or repeating individual fields or frames and corresponding amounts of audio segments. The video and audio portions of the programming material are separated and subjected to processing through a pair of program time changing units. The video portion is processed by deleting individual fields or frames on a manual, periodic or automatic basis. Manual deletion is done by an operator observing the program material on a monitor. Periodic deletion is performed automatically after the operator specifies the total amount of time (or number of fields or frames) to be deleted, with every ith frame or field deleted regardless of content. Automatic deletion is done in a fashion similar to periodic deletion, but the fields or frames are examined and are deleted on the basis of the amount of between frame motion.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: February 27, 2001
    Assignee: Prime Image, Inc.
    Inventors: Leonard Keith Moeller, Christopher Scott Gifford, William B. Hendershot, III
  • Patent number: 6192502
    Abstract: In a Viterbi decoder, an SMU is used instead of a PMU. The SMU has four status memories that process a status data value composed of a plurality of bits that represent a status at a time. The status memories generate a sequence of four status data values. A merge block generates decoded data corresponding to the four status data values, detects mismatches of four status data values, and generates a mismatch detection signal NM. The number of mismatches is counted corresponding to the mismatch detecting signal NM. The quality of decoded data and reproduced signal are evaluated corresponding to the count value.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: February 20, 2001
    Assignee: Sony Corporation
    Inventors: Shigeo Yamaguchi, Takayoshi Chiba, Junichi Horigome
  • Patent number: 6192066
    Abstract: A RAKE receiver includes an arithmetic circuit for weighting coefficients. The arithmetic circuit obtains the signal power for each path from the reception amplitude on the path which is detected by a transmission path characteristics detector, and also obtains the interference powers from the reception amplitudes on two other paths which are respectively detected by transmission path characteristics detectors. The arithmetic circuit then calculates the weighting coefficients on the basis of the these signal powers and interference powers. The weighting coefficients are respectively supplied to weighting multipliers, thereby weighting the reception signals from the respective paths. A symbol synthesizer performs symbol synthesis of the resultant signals.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: February 20, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yutaka Asanuma
  • Patent number: 6191903
    Abstract: This invention relates to a recording medium, data transmission apparatus, data receiver, and optical disk unit, and particularly applies to a system which transmits video data and other data or records them on an optical disk in a predetermined block unit, and permits each frame to be easily and correctly located by low volumes of identification data. At least contiguous synchronization patterns or/and contiguous synchronization patterns with one synchronization pattern interleaved therebetween are assigned with unique combinations.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: February 20, 2001
    Assignee: Sony Corporation
    Inventors: Kensuke Fujimoto, Masahiro Shigenobu, Hideki Mawatari
  • Patent number: 6190357
    Abstract: A device for occlusion of a body passageway and subsequent perfusion of the body passageway with arterial return blood, cardioplegia and other fluid is disclosed. The device of the present invention is an expandable cannula comprising a flexible, expandable tubular elongate body having a first diameter and a second diameter, wherein the expandable cannula is inserted having a first diameter and then expanded to a second diameter to provide perfusion flow to the body passageway through at least one arterial return aperture provided on the distal end of the expandable tubular elongate body in fluid communication with a perfusion lumen provided within the cannula. The device may be further provided with one or more additional lumens for providing additional functions to the vessel lumen and may also include an expandable occluding member fixed at the distal end of the cannula for isolating the surgical area from the rest of the arterial system.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: February 20, 2001
    Assignee: Cardiothoracic Systems, Inc.
    Inventors: Richard M. Ferrari, Dwight P. Morejohn, Ivan Sepetka, Robert C. Glines
  • Patent number: 6191642
    Abstract: A charge pump circuit is provided which includes a plurality of successively coupled charge pump stages. Each of these successively coupled charge pump stages receives at least one input signals and at least one clock input signals, and in accordance therewith, conveys at least one output signal. Significantly, at least one output signal of a prior charge pump stage is substantially equal to at least one input signal of a next adjacent charge pump stage, so that the prior adjacent charge pump stage will be effectively shut off, so that reverse current flow can be prevented through the charge pump circuit.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: February 20, 2001
    Assignee: Silicon Storage Technology, Inc.
    Inventor: Tam Nguyen
  • Patent number: 6190936
    Abstract: A metal surface having optimized reflectance is created utilizing the following process steps alone or in combination: 1) performing alloy/sintering of the metal-silicon interface prior to a chemical mechanical polish of the intermetal dielectric before the reflective metal electrode is formed; 2) chemical-mechanical polishing the intermetal dielectric layer again after vias are formed; 3) forming a metal adhesion layer composed of collimated titanium over the underlying dielectric; 4) depositing metal upon the adhesion layer at as low a temperature as feasible to maintain small grain size; 5) depositing at least the first layer of the reflectance enhancing coating on top of the freshly deposited metal prior to etching the metal; and 6) depositing the initial layer of the reflective enhancing coating at a temperature as close as possible to the temperature of formation of the metal electrode layer in order to suppress hillock formation in the metal. Deposition of the REC serves two distinct purposes.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: February 20, 2001
    Assignee: National Semiconductor Corp.
    Inventors: Paul McKay Moore, Kevin Carl Brown, Richard Luttrell
  • Patent number: 6187530
    Abstract: An aquatic autosampler device for frequent collection of discrete samples of microorganisms at various locations and depths. The aquatic autosampler device moves a filter disk within a filter housing from a filter carousel into a filter housing holder. The filter housing holder, slidably mounted on a linear shuttle, moves the filter housing into a process position, where a syringe draws fluid in through a valve manifold and through the filter disk to collect samples on the filter disk. Reagents may then be passed over the filter disk to enable image-based identification and quantification of the cells on the filter disk. An imaging system on the autosampler may capture a fluorescent image of the microorganisms on the filter disk and store the image in a control computer. The filter housing may then be returned to the filter carousel for storage and further lab processing.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: February 13, 2001
    Assignee: Monterey Bay Aquarium Research Institute
    Inventors: Christopher A. Scholin, Eugene I. Massion, David K. Wright, Danelle E. Cline, Ed Mellinger, Mark Brown
  • Patent number: 6187283
    Abstract: Hydrothermal synthesis of the natural, alkaline earth zeolites via the alteration of Y-zeolite is presented. Synthetic versions of the zeolites harmotome, heulandite, brewsterite and gmelinite are synthesized from Y-zeolite using alkaline earth cations containing solutions. The effect of the composition of the starting zeolite, the composition of the solution phase, the presence or absence of seeds and the experimental conditions are discussed.
    Type: Grant
    Filed: July 20, 1999
    Date of Patent: February 13, 2001
    Assignee: California Institute of Technology
    Inventors: Osamu Chiyoda, Mark E. Davis
  • Patent number: 6188802
    Abstract: An information input apparatus, an information input method, and an information input sheet which a user can easily operate without directly having to become aware of hardware are provided. An information input sheet includes a display area having an input information area and an identification area in which an identification code of the input information is provided. The identification code of the input information is provided in the display area as a target pattern having a rotation mode in which a code is defined by a directional orientation of the target pattern. An image pickup unit generates imaging information from imaging the information input sheet. The imaging information includes imaging information of the identification area of the information input sheet. Based on this imaging information of the identification area, the rotation mode of the target pattern, as recognized by an image recognition unit, is determined. The rotation mode specifies the identification code of the information input sheet.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: February 13, 2001
    Assignee: Sony Corporation
    Inventors: Hiroshi Usuda, Mitsuhiro Miyazaki
  • Patent number: 6184413
    Abstract: Supported phase catalysts in which the support phase is highly polar, most preferably ethylene glycol or glycerol, are disclosed. An organometallic compound, preferably a metal complex of chiral sulfonated 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl is dissolved in the support phase. Such supported phase catalysts are useful for asymmetric synthesis of optically active compounds, including the asymmetric hydrogenation of prochiral unsaturated carbon-hetero atom bonds, such as ketones, imines and beta-keto esters.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: February 6, 2001
    Assignee: California Institute of Technology
    Inventors: Mark E. Davis, Kam To Wan
  • Patent number: 6185633
    Abstract: A descriptor controlled transmit and receive scatter/gather Direct Memory Access Controller efficiently moves data frames comprised of scattered blocks of data from within memory to a destination interface via a multibyte-wide buffer. The transfer of frames into a transmit buffer and out of a receive buffer is optimized regardless of the total length of the component data blocks and regardless of whether the data blocks include an odd or even number of bytes, whether the data blocks begin at an odd or even address, or whether the data blocks are misaligned with regard to memory width boundaries. A DMAC in accordance with an embodiment of the present invention stores information provided by a descriptor before frame processing takes place. This information in conjunction with steering logic and accumulator registers is used to control the steering and storing of the frame data as it passes through the DMAC to the transmit buffer or from the receive buffer.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: February 6, 2001
    Assignee: National Semiconductor Corp.
    Inventor: Mark A. Johnson
  • Patent number: D438627
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: March 6, 2001
    Assignee: Jacuzzi Inc.
    Inventors: Roy A. Jacuzzi, Phillip J. Weeks, Garo J. Paroonagian