Patents Represented by Attorney, Agent or Law Firm Douglas L. Weller
  • Patent number: 5916843
    Abstract: A produces a picture with an integrated picture frame. In the method, a dye sublimation process is used to transfer a design to a plastic sheet. The design includes an image of the picture and an image of the integrated picture frame for the picture. After transfer of the design to the plastic sheet, the plastic sheet is pressed in order to shape the plastic sheet into a three-dimensional form in appearance of a framed picture.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: June 29, 1999
    Inventor: John V.C. Weller
  • Patent number: 5903468
    Abstract: In accordance with the preferred embodiment of the present invention, a logic cell library is built. Within the logic cell library a timing model for a first logic cell is generated. In order to generate the timing model a number of indices which specify input ramp for the first logic cell is selected. Also, a number of indices which specify output load for the first logic cell is selected. Also selected are a minimum value for the input ramp and a maximum value for the input ramp. A maximum output load for the timing model is calculated. This is done by calculating, for every input transition in the logic cell which causes an output transition, an intermediate value to be an output load value which results in the first logic cell producing an output signal to the first logic cell which has the maximum value for the input ramp when an input signal to the logic cell has the minimum value for the input ramp. The maximum output load is chosen to be a minimum of the calculated intermediate values.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: May 11, 1999
    Assignee: VLSI Technology, Inc.
    Inventors: Michael N. Misheloff, Sabita Jasty
  • Patent number: 5898711
    Abstract: Secure operations within an integrated circuit are protected. In order to perform the protection a plurality of single event upset detectors are distributed within the integrated circuit. The single event upset detectors include bit-registers. Each of the plurality of the single event upset detectors is monitored for a single event upset. When a single event upset in any of the single event upset detectors is detected, an error condition is indicated.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: April 27, 1999
    Assignee: VLSI Technology, Inc.
    Inventor: Mark Leonard Buer
  • Patent number: 5896550
    Abstract: Versatility of access to a register set within a direct memory access (DMA) controller is increased. The DMA controller controls direct memory access transfers to and from a main memory. When a first control field in a configuration register has a first value, normal operating access is provided to a register set within the DMA controller. The register set provides control and status of the direct memory access transfers to and from the main memory. When the first control field in the configuration register has a second value special access is provided to the register set. The special access allows storage and restoration of a state of a DMA transfer.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: April 20, 1999
    Assignee: VLSI Technology, Inc.
    Inventors: Omer Lem Wehunt, Jeffrey M. Lavin
  • Patent number: 5896514
    Abstract: Within a single integrated circuit, a bus operates in accordance with a bus protocol. The bus protocol includes a first control signal which, when not implemented within a single integrated circuit, is implemented using a pull-up resistor and tri-state gates within functional blocks attached to the bus. A first functional block includes a first input line for receiving an input component of the first control signal, and includes first logic means for generating a first output component of the first control signal. A second functional block includes a second input line for receiving the input component of the first control signal, and includes second logic means for generating a second output component of the first control signal. A logic block includes first logic for generating the input component of the first control signal. The first logic utilizes the first output component and the second output component to generate the input component of the first control signal.
    Type: Grant
    Filed: August 23, 1997
    Date of Patent: April 20, 1999
    Assignee: VLSI Technology, Inc.
    Inventor: David Gerard Spaniol
  • Patent number: 5841823
    Abstract: A clock signal is extracted from a received signal. An edge detector detects edges of the received signal, where the received signal transitions between a logic 0 and a logic 1. A center between each pair of consecutive edges is determined. Each center which is not within an associated correction window is discarded. An extracted clock signal is generated. The phase of the extracted clock signal is varied based on the centers between each pair of consecutive edges which are not discarded. In one embodiment, a current correction window size is varied based on whether an immediate previous center was within an immediate previous correction window. When the immediate previous center is discarded because it is not within the immediate previous correction window, the current correction window size is enlarged.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: November 24, 1998
    Assignee: VLSI Technology, Inc.
    Inventor: Roland Van Der Tuijn
  • Patent number: 5842012
    Abstract: A computer system includes a central processing unit (CPU), system read-only memory (ROM), a random access memory (RAM) and a system controller. The system ROM includes a reset vector. A portion of the RAM is used to shadow the system ROM. The system controller is connected between the CPU, the system ROM and the RAM. The system memory includes an internal memory for storing first data. The system memory also includes logic which, in response to receiving an access to a reset vector stored in the system ROM, returns the first data stored in the internal memory.
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: November 24, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: Gary Walker, David K. Cassetti, Nicholas J. Richardson
  • Patent number: 5835791
    Abstract: A keyboard controller supports both a first keyboard/mouse interface and a second keyboard/mouse interface. Data is routed between the first keyboard/mouse interface and a first host interface when the first host interface is active. Data is routed between the first keyboard/mouse interface and a first shell when a second host interface is active. The first shell provides compatible connection between the first keyboard/mouse interface and the second host interface. Data is routed between the second keyboard/mouse interface and the second host interface when the second host interface is active. Data is routed between the second keyboard/mouse interface and a second shell when the first host interface is active. The second shell provides compatible connection between the second keyboard/mouse interface and the first host interface.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: November 10, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: Lonnie C. Goff, David Ross Evoy, Franklyn Story
  • Patent number: 5795492
    Abstract: A metal, such as Platinum, is stripped from a wafer during processing of an integrated circuit. The wafer, typically within a cassette of wafers, is submerged in de-ionized water. The de-ionized water is, for example, held within a container made of quartz. Optimally, the de-ionized water is heated, for example, to a temperature of 80 degrees Centigrade. Chlorine gas and hydrochloric acid gas are bubbled into the de-ionized water to oxidize the metal.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: August 18, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: Kenneth Reis, Allen Page
  • Patent number: 5793107
    Abstract: A heat sink is formed on a bonded semiconductor on insulator (SOI) wafer. A trench is formed which extends from a top of the bonded SOI wafer through an isolation region of the bonded SOI wafer to a base of the bonded SOI wafer. The base of the bonded SOI wafer is located below the isolation region of the bonded SOI wafer. A conductive pillar is formed in the trench. The conductive pillar extends from the top of the bonded SOI wafer through the isolation region of the bonded SOI wafer and is physically in contact with but electrically insulated from the base of the bonded SOI wafer. In the preferred embodiment, the conductive pillar is formed of doped polysilicon. The doped polysilicon is of a conductivity type which is different than the conductivity type of the base. Out-diffusion from the doped polysilicon forms a region within the base which electrically insulates the conductive pillar from the base.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: August 11, 1998
    Assignee: VLSI Technology, Inc.
    Inventor: Edward D. Nowak
  • Patent number: 5764933
    Abstract: A method for preventing deadlocks is used in a computing system in which a host bus is connected to a first input/output bus through a first bridge and the first input/output bus is connected to a second input bus through a second bridge. When transferring data from a first input/output device on the second input/output bus to a memory on the host bus, the first input/output device requests mastership of the second input/output bus. Before granting mastership to the first input/output device, the second bridge instructs the first bridge to flush and disable write buffers within the first bridge. After the write buffers have been flushed, the first input/output device is granted mastership of the second input/output bus. The second bridge requests mastership of the first input/output bus by asserting a request signal on a request line. The first bridge then obtains mastership of the host bus in order to allow the transfer of the data from the first input/output device to the memory.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: June 9, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: Nicholas J. Richardson, David Ross Evoy, Franklyn Story
  • Patent number: 5763955
    Abstract: A metal layer on an integrated circuit includes active signal lines and fill metal segments. The fill metal segments are polygons. Each fill metal segment at its narrowest has a width which is not greater than 1.25 times a design rule metal pitch for a technology used to fabricate the integrated circuit. In addition, each fill metal segment is separated from every other fill metal segment by spacing which is at least 0.7 times the design rule metal pitch for the technology used to fabricate the integrated circuit. Also, each fill metal segment is separated from every active signal line by spacing which is at least 0.5 times the design rule metal pitch for the technology used to fabricate the integrated circuit.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: June 9, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: Paul Raj Findley, Morgan Smith
  • Patent number: 5758173
    Abstract: Power is conserved in a computing system by detecting when a user's hands are not placed over a keyboard for the computing system. When it is detected that the user's hand are not placed over the keyboard power to a display for the computing system is reduced. For example, the hands are detected by generating and detecting ultrasound waves. In one embodiment of the present invention, the ultrasound waves are generated and detected from positions on a case of the computing system so that when the user's hands are placed on the keyboard, the user's hands block a portion of the ultrasound waves from being detected. In another embodiment, the ultrasound waves are generated and detected from positions on a case of the computing system so that when the user's hands are placed on the keyboard, the user's hands reflect a portion of the ultrasound waves so that the portion of the ultrasound waves are detected.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: May 26, 1998
    Assignee: VLSI Technology, Inc.
    Inventor: David Ross Evoy
  • Patent number: 5754070
    Abstract: A metastableproof flip-flop receives an input value on a flip-flop input. The flip-flop holds an output value on a flip-flop output. In response to a transition of a clock signal, a transition in the output value occurs. The new output value is the input value formerly received by the flip-flop. In order to make the flip-flop metastableproof, the transition in the output value is delayed when the input value is in a metastable state. When the input value is no longer in the metastable state, then the transition in the output value is allowed to complete.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: May 19, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: D. Douglas Baumann, Madhusudan K. Chokshi
  • Patent number: 5754614
    Abstract: A Gray Code counter includes first translator logic, binary incrementing/decrementing logic, second translator logic, and a clocked storage device. The first translator logic receives at an input a Gray Code number, I.sub.gray ?n:0! which the first translator translates into a binary number, I.sub.bin ?n:0!. The binary incrementing/decrementing logic either increments or decrements the binary number I.sub.bin ?n:0! to produce an incremented/decremented binary number, Z.sub.bin ?n:0!. The second translator logic translates the incremented/decremented binary number Z.sub.bin ?n:0! into an incremented/decremented Gray Code number, Z.sub.gray ?n:0!. The clocked storage device stores the incremented/decremented Gray Code number, Z.sub.gray ?n:0!. The clocked storage device also feeds the incremented/decremented Gray Code number, Z.sub.gray ?n:0!, to the input of the first translator logic.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: May 19, 1998
    Assignee: VLSI Technology, Inc.
    Inventor: Neal Wingen
  • Patent number: 5748019
    Abstract: A circuit for producing a buffered output includes a power source, a ground, a circuit input, a circuit output, a voltage reference source, a current control pre-driver and an output driver. The circuit input receives an input signal. The circuit output produces an output signal. The voltage reference source generates a reference voltage. The current control pre-driver includes a first current source, a second current source, and control logic. The first current source is connected to the power source and has a first control input. The second current source is connected to the ground and has a second control input. The control logic is connected to the circuit input, to the voltage reference source, to the first control input of the first current source and to the second control input of the second current source. In response to a first voltage value of the input signal on the circuit input, the control logic turns off the second current source and turns on the first current source.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: May 5, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: Belle Wong, Donald Lee, Derwin Mattos
  • Patent number: 5744992
    Abstract: A digital phase shifter phase shifts an input signal by a predetermined phase angle. A length of a cycle of the input signal is determined. Then an output signal is generated which is phase delayed from the input signal by a phase amount. The phase amount is approximately equal to the length of the cycle of the input signal multiplied by the predetermined phase angle.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: April 28, 1998
    Assignee: VLSI Technology, Inc.
    Inventor: Douglas D. Baumann
  • Patent number: 5715077
    Abstract: A multi-mode infrared interface allows for the selection of an encoding mode from a plurality of modes for infrared light transmission. When there is a transmission, an outgoing serial data stream is produced. The infrared interface transmits the serial data stream by infrared light using the selected mode. For example, a first mode is serial data stream transmission where an IR light pulse is transmitted for each bit of data having a first value. A second mode is modulated serial data stream transmission where a modulated IR light pulse is transmitted for each bit of data having a first value. A third mode is REDEYE transmission using the HP Redeye "REDEYE" format. A fourth mode uses a format defined by a user in software.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: February 3, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: Gregg D. Lahti, Franklyn H. Story
  • Patent number: 5714785
    Abstract: A structure is used for electrostatic discharge protection of an integrated circuit. The modified ladder structure includes drain regions which extend from an output pad. These are interleaved with source regions. For example, for a structure with two drain regions and two source regions, a first drain region extending from the output pad is separated from a first source region by a first gate region. A second drain region extending from the output pad is separated from the first drain region by a first insulating region. A second source region is separated from the second drain region by a second gate structure. For a structure with four drain regions and three source regions, there is additionally, a third drain region extending from the output pad. The third drain region is separated from the second source region by a third gate region. A fourth drain region extending from the output pad is separated from the third drain region by a second insulating region.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: February 3, 1998
    Assignee: VLSI Technology, Inc.
    Inventor: Chun Jiang
  • Patent number: 5712200
    Abstract: A resistor formed in a well adjacent to a transistor serves as a ballast resistor for the transistor. The transistor is formed in a first region on a substrate. The first region is of a first conductivity type. A well of second conductivity type is formed adjacent to the first region. A gate region is formed over a portion of the first region. Concurrently, a covering is formed over a first area of the well. The covering and the gate region are comprised of the same material. Source/drain regions of the second conductivity type are formed on either side of the gate region. The source/drain regions are of the first conductivity type. A first source/drain region extends into the well. Concurrent to the forming of the source drain regions, a doped region is formed within the well. The doped region and the first source/drain region have the same doping density. The doped region is physically separated from the first source/drain region by the first area of the well.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: January 27, 1998
    Assignee: VLSI Technology, Inc.
    Inventor: Chun Jiang