Patents Represented by Attorney Robert P. Bell
  • Patent number: 7143973
    Abstract: The present invention provides a tilt rotor aircraft having a centrally mounted tiltable engine and rotor assembly. A turbine or other type of engine (or engines) is pivotally mounted on a central frame above and between the pilot and co-pilot, who occupy separate and identical control cockpit pods on either side of the engine. Placing the engine between the pilot and copilot maintains the CG within a narrow band in both horizontal and vertical flight modes, simplifying control and handling. Counter-rotating propellers may be driven by the engine(s) to eliminate torque effects. By mounting the engine and rotor package between and above the pilot and copilot, the rotor can be made to clear the ground, allowing the aircraft to land like an ordinary fixed-wing aircraft without damaging the propellers. Thus, the craft can be launched and landed in VTOL, HTOL, or STOL configurations, depending upon conditions and available landing and takeoff sites.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: December 5, 2006
    Inventor: Kenneth Sye Ballew
  • Patent number: 7134039
    Abstract: A number of different subroutines or algorithms are provided for locating lost video data, reconstructing navigation data, and creating new navigation files or the like so that the DVD may be made readable by an ordinary DVD player. The present invention provides algorithms to recover video data for each of a number of different DVD formats, so that video data may be recovered regardless of which format DVD was being used at the time (e.g., DVD+RW, DVD+R, DVD-RW, DVD-R, or the like). In addition, the present invention provides a number of other algorithms that be used by one or more of the different recovery algorithms, to recover various aspects of data from a disc. The combination of these algorithms provides a complete package of data recovery techniques that allows for video data to be recovered in the event of a power loss or other interruption, and in most instances, creates recordable DVD which may be subsequently read by other DVD players and the like.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: November 7, 2006
    Assignee: Magnum Semiconductor, Inc.
    Inventor: Samuel C. Wang
  • Patent number: 6993722
    Abstract: A user interface system, method and computer program product permits selection of predetermined device application modes in a television set system and checking the activation status of other application modes. If active modes are identified which are incompatible with the selected active mode, then these other active modes are halted. If compatible active modes are identified, then these remain concurrently active, with particularized adaptations being made. The user interface is particularly adapted for use with a set-top box environment using a TV set as a user display.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: January 31, 2006
    Assignee: Cirrus Logic, Inc.
    Inventors: Frank Greer, Sean Priddy, Rafael Heredia
  • Patent number: 6850225
    Abstract: A data-entry device having manually operable input means arranged in zones for operation by corresponding fingers of a user. The device includes means for color coding such that each zone is assigned a color and successive zones display colors ordered according to their relative positions within a spectrum-ordered color pattern. In one embodiment the device includes a keyboard, such as for a computer or typewriter, wherein the keys of the keyboard are color-coded according to a spectrum-ordered color pattern. The invention also provides a method of color coding a data-entry device.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: February 1, 2005
    Inventor: Jerome Eymard Whitcroft
  • Patent number: 6850774
    Abstract: A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between paging signals indicating CDPD mode communications and those indicating analog cellular communications. The handset also automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. The handset maintains an active status on a CDPD communication channel during a “sleep mode”, when the handset can carry out AMPS activity.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: February 1, 2005
    Assignee: Cirrus Logic, Inc.
    Inventor: Russell P. Cashman
  • Patent number: 6806829
    Abstract: The surveillance system provides a means to augment Automatic Dependent Surveillance—Broadcast (ADS-B) with “look alike ADS-B” or “pseudo ADS-B” surveillance transmissions for aircraft which may not be ADS-B equipped. The system uses ground based surveillance to determine the position of aircraft not equipped with ADS-B, then broadcasts the identification/positional information over the ADS-B data link. ADS-B equipped aircraft broadcast their own position over the ADS-B data link. The system enables aircraft equipped with ADS-B and Cockpit Display of Traffic Information (CDTI) to obtain surveillance information on all aircraft whether or not the proximate aircraft are equipped with ADS-B.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: October 19, 2004
    Assignee: Rannock Corporation
    Inventors: Alexander E. Smith, Carl Evers
  • Patent number: 6775217
    Abstract: The invention provides a method and apparatus for generating delays to shift edges of an EFM data stream from an EFM modulator for a CD-R and CD-RW write encoder. EFM data pulse edges may be delayed in increments of about {fraction (1/32)} Tefm where Tefm is the code rate clock of an EFM data stream output. The delays are generated by a synthesizer running at four times the EFM code rate. The synthesizer may be built using a four-stage ring oscillator. Delays are selectable based upon the write strategy matrix in coarse increments of ¼ T and fine increments of {fraction (1/32)} T. For the coarse delay, the EFM data may be passed through a four stage shift register running at Fsynth, where Tefm=4×Fsynth, allowing for a coarse delay selection of ¼ Tefm.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: August 10, 2004
    Assignee: Cirrus Logic, Inc.
    Inventors: Keisuke Kato, Syed H. Husaini, Weichi Ding
  • Patent number: 6753807
    Abstract: An N-way RF/microwave power divider/combiner utilizes one input and N outputs, or conversely N inputs and one output to divide (or combine) RF/microwave power while simultaneously and non-invasively measuring reflected power present due to mismatched loads or other failed components. The Gysel divider/combiner technique is used with the addition of N temperature measuring devices placed directly on the N isolation loads separated from the main divider/combiner lines. Because of high isolation between the N channels of the divider/combiner, the temperature above ambient of each isolation load is strongly correlated to the amount of power reflected back to an output port. The temperature is sensed external to the RF circuit whereby a measure of reflected power can be made without the use of invasive directional-coupler techniques. This is highly advantageous since directional-coupler techniques would increase the insertion-loss, cost, and complexity of the divider/combiner.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: June 22, 2004
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Scott Andrew McLaughlin, Daniel Christopher Law
  • Patent number: 6629089
    Abstract: A robust Artificial Neural Network controller is proposed for the motion control of a magnetic disk drive voice coil motor (voice coil motor). The neural controller is used to approximate the nonlinear functions (actuator electromechanical dynamics) of the voice coil motor while having on line training. One main advantage of this approach, when compared with standard adaptive control, is that complex dynamical analysis is not needed. Using this design, not only strong robustness with respect to uncertain dynamics and non-linearities can be obtained, but also the output tracking error between the plant output and the desired reference can asymptotically converge to zero. Additionally, standard offline training, utilizing training vectors to stimulate the voice coil motor, is not required.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: September 30, 2003
    Assignee: Cirrus Logic, Inc.
    Inventor: Lou Supino
  • Patent number: 6587434
    Abstract: The present invention includes an intelligent router and method for improving the routing of datagrams, resulting in increased effective bandwidth over networks of high latency. The intelligent router can be used alone or in combination with a second intelligent router. An intelligent router buffers data bound for a destination node within the router itself until the destination node has available space. In addition, the intelligent router of the present invention may continue to transmit a datagram without waiting for confirmation of receipt of a previous datagram. Also, retransmission requests can be ignored until a later time to accommodate for the delay in the network. When using multiple intelligent routers communicating with each other, only the erroneous portions of individual datagrams need to be resent. Routing between two intelligent routers eliminate or reduces the transmission of redundant data being sent.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: July 1, 2003
    Assignee: Cirrus Logic, Inc
    Inventor: Robert E. Cousins
  • Patent number: 6567233
    Abstract: There is a need for low-cost and reliable shock-sensing methods in magnetic hard-disk drives to maintain data integrity when a drive is subjected to external shocks. The present invention uses a novel shock-sensing method that is both reliable and low-cost, using a modified head preamplifier to detect servo fields from adjacent disk surfaces, as well as the disk surface being written or read. Servo fields on adjacent surfaces may be staggered. When a write head is writing data to a data field on a disk surface, a read head may be reading a servo field from an adjacent surface, insuring that the write head is on-track. By staggering the servo fields from surface to surface, shock may be sensed by measuring displacement of read heads on adjacent surfaces between servo sectors on the write surface. In addition, the use of a shock sensor or the like may be eliminated, reducing drive component cost.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: May 20, 2003
    Assignee: Cirrus Logic, Inc.
    Inventors: Kok-Kia Chew, Gerald Keith Lunn
  • Patent number: 6563505
    Abstract: A graphics controller circuit for minimizing an amount of data received from a host. The graphics controller circuit includes a register file with a plurality of registers. The graphics controller accepts commands addressed to virtual registers, and generates plurality of instructions including an instruction to access one of the registers in the register file. By using such a virtual register number in a command and generating several instructions in response thereto, the graphics controller circuit of the present invention minimizes the amount of data host sends over the system bus.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: May 13, 2003
    Assignee: Cirrus Logic, Inc.
    Inventors: Karl Scott Mills, Richard Charles Andrew Owen, Mark Emil Bonnelycke
  • Patent number: 6557131
    Abstract: A Built-In Self-Test (BIST) circuit is employed to automatically test integrated analog to digital converters (ADC). Proposed technique applies delta-sigma (&Dgr;&Sgr;) modulator concept to ADC testing and results in a fully automated accurate test procedure suitable for differential non-linearity (DNL) and integral non-linearity (INL) testing. Additional analog circuitry does not have a significant effect on the test accuracy and the test resolution is determined by the sampling frequency of the delta-sigma modulator.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: April 29, 2003
    Assignee: Cirrus Logic, Inc.
    Inventor: Karim Arabi
  • Patent number: 6542150
    Abstract: A display controller in a computer system controls the asynchronous output of graphics display data in a computer system having at least one fixed resolution flat panel display. Fixed panel displays may have problems displaying non-native resolutions particularly at lower resolutions. The controller of the present invention uses a time base converter, horizontal and vertical Discrete Time Oscillators (DTO), and polyphase interpolator, which may be Discrete Cosine Transform(DCT)-based to expand graphics display data asynchronously from native resolution to at least one resolution suitable for display on a fixed resolution panel. Graphics data may also be output asynchronously to a CRT. Time base converter receives frequency related input parameters and generates at least one asynchronous output at the desired output resolution.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: April 1, 2003
    Assignee: Cirrus Logic, Inc.
    Inventors: Sridhar Kotha, Vlad Bril, Alexander J. Eglit
  • Patent number: 6487674
    Abstract: A data clock pin SCLK may be used to receive an SCLK signal as well as sleep and reset signals. During normal operation, the SCLK input pin may receive the SCLK signal, a square wave type clock signal. However, the SCLK signal may also be coupled to a one-shot within the device. When signal SCLK is held high for a predetermined period of time, the one-shot is triggered and a SLEEP signal is generated. The device reacts to this SLEEP signal by entering a sleep mode. Similarly, if the SCLK signal is held low for a predetermined period of time, the one-shot may output a low level RESET signal. This RESET signal resets the device into an initial condition state. Other modes of operation, such as test modes and the like may be entered into by holding the SCLK signal high or low in conjunction with a predetermined logic level on another pin (e.g., VREF).
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: November 26, 2002
    Assignee: Cirrus Logic, Inc.
    Inventors: Joe White, Jerome Johnston, Douglas F. Pastorello
  • Patent number: 6449494
    Abstract: A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between paging signals indicating CDPD mode communications and those indicating analog cellular communications. The handset also automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. The handset maintains an active status on a CDPD communication channel during a “sleep mode”, when the handset can carry out AMPS activity.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: September 10, 2002
    Assignee: Cirrus Logic, Inc.
    Inventor: Russell P. Cashman
  • Patent number: 6445330
    Abstract: The present invention provides an alternative to Prior Art isolation techniques by providing a capacitively coupled reference voltage and a capacitively coupled gain calibration. The isolation technique of the present invention is based upon the idea of a near unity gain capacitive divider. If the load or parasitic capacitance is Cload and the isolation capacitance is Ciso, then the gain between input and output can be calculated as Vout/Vin=(Ciso)/(Ciso+Cload), which will be nearly unity (i.e., 1) when Ciso>>Cload. In addition, if Ciso>>Cload, the gain will also be largely insensitive to variations in Ciso and Cload. For example, if Cin is 100 ppm of Ciso, then a 10% variation in Ciso or Cload results in only a 10 ppm variation in the voltage gain.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: September 3, 2002
    Assignee: Cirrus Logic, Inc.
    Inventors: Axel Thomsen, Qicheng Yu
  • Patent number: 6356968
    Abstract: The present invention provides an apparatus and method for transmitting serial data bits in a computer system having both an IEEE 1394 bus and a universal serial bus. The arrangement comprises a networked entertainment system comprising a host computer system and a remote peripheral consumer electronics device. The host system includes a processor, a bus, a memory, and a graphics card. A host interface circuit is coupled to the host system to provide an interface with a remote peripheral device. A remote interface circuit is coupled to the remote peripheral device to provide an interface with the host system. The host interface circuit and the remote interface circuit are connected to each other by an IEEE 1394 bus cable. The host interface circuit provides a USB port for connecting a USB device to the host system. The remote interface circuit provides USB ports for connecting USB devices.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: March 12, 2002
    Assignee: Cirrus Logic, INC
    Inventor: Jakob Kishon
  • Patent number: 6357036
    Abstract: The present invention provides a bond tool utility software package which extracts bond pad location data from a semiconductor chip design stored in one of a number of known formats (e.g., Opus, GDSII, or the like) and extracts conductor location data from an AUTOCAD file of a chip frame design. The utility retrieves bonding connection data from a design ASCII file and generates a bonding diagram for the semiconductor assembly. The utility also contains a subroutine for applying bonding design criteria to the resultant bonding diagram to determine whether all bonds are within established guidelines. If an impermissible bond is formed, the user may be alerted that one or more bonding pads may have to be relocated. In one embodiment of the present invention, the bonding utility may interface with a semiconductor design circuit to generate a suggested fix to an impermissible bonding situation. One or more bonding pads may be moved in the semiconductor design to correct for potential bonding deficiencies.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: March 12, 2002
    Assignee: Cirrus Logic, Inc.
    Inventors: Laiman Eka, Marcello R. Martinez, III, Carl H. Fong
  • Patent number: D523674
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: June 27, 2006
    Inventors: Philippe Starck, Joel Pinsky