Patents Assigned to Analog Devices
  • Publication number: 20090007058
    Abstract: In one aspect, a software application for facilitating design of a register specification is provided. The application comprises an interface adapted to receive input from a user indicating information about at least one register in the register specification, the interface generating register information based on the received input, a translator coupled to the interface to receive the register information and adapted to convert the register information to an internal representation, and at least one filter adapted to transform the internal representation into at least one respective output format.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 1, 2009
    Applicant: Analog Devices, Inc.
    Inventor: Tushneem Dharmagadda
  • Patent number: 7470968
    Abstract: A passive matching network is connected to an input/output line for an automatic test equipment drive channel to compensate for capacitances associated with a receiver circuit connected to the line, and also an optional current-mode driver circuit. The matching circuit preferably comprises a T-coil circuit that can include a bridging capacitor; separate T-coil circuits can be provided to separately compensate for receiver circuit and current-mode driver circuit capacitances. The driver and receiver circuits can be implemented on a common layer of an integrated circuit, with the T-coil windings implemented in a separate layer of the same integrated circuit that is spaced from the common layer by at least one dielectric layer.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: December 30, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Douglas W. Babcock, Robert A. Duris, Bruce Hecht
  • Patent number: 7472259
    Abstract: In one embodiment, a pipelined processor is described that includes an execution pipeline having a plurality of stages and a multi-cycle instruction (MCI) controller adapted to assert a stall signal to stall the multi-cycle instruction within one of the stages of the execution pipeline. The MCI controller is adapted to issue a plurality of instructions to subsequent stages in the pipeline while the multi-cycle instruction is stalled.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: December 30, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Gregory A. Overkamp, Charles P. Roth, Ravi P. Singh
  • Patent number: 7471229
    Abstract: An analog to digital converter system includes at least one stage for providing a first full precision, full latency output and a second output providing a less than full latency, less than full precision coarse level indicator signal.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: December 30, 2008
    Assignee: Analog Devices, Inc.
    Inventors: William George John Schofield, Joseph Bradford Bannon, Carroll Speir, Scott Bradsley
  • Patent number: 7471341
    Abstract: A ghost image cancellation technique for video signals received from multipaths during transmission of a TV signal over a transmission channel. In one example embodiment, an apparatus computes edge parameters of synchronization signals received from each of the multipath video signals. The edge parameters are then used to select an input video signal. The selected input video signal along with the computed edge parameters are then used to remove remaining video signals from the video signals received from the multipaths to cancel ghost images.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: December 30, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Rajesh Bhaskar, Sudheesh A Somanathan
  • Publication number: 20080315334
    Abstract: A low-temperature inorganic dielectric ALD film (e.g., Al2O3 and TiO2) is deposited on a packaged or unpackaged chip device so as to coat the device including any exposed electrical contacts. Such a low-temperature ALD film generally can be deposited without damaging the packaged chip device. The ALD film is typically deposited at a sufficient thickness to provide desired qualities (e.g., hermeticity for the entire packaged chip device, passivation for the electrical contacts, biocompatibility, etc.) but still allow for electrical connections to be made to the electrical contacts (e.g., by soldering or otherwise) directly through the ALD film without having to expose the electrical contacts.
    Type: Application
    Filed: June 20, 2008
    Publication date: December 25, 2008
    Applicant: Analog Devices, Inc.
    Inventor: John R. Martin
  • Publication number: 20080311947
    Abstract: A method of decoding data comprising a plurality of data-bursts, comprising the steps of: i) receiving a first one of the data-bursts, ii) associating hypothesis data with the or each received data-bursts; iii) attempting to decode the data; and iv) if the decode is successful to power down the receiver, and if the decode is unsuccessful receiving a further one of the data-bursts and repeating steps ii) to iv), until all of the data has been received.
    Type: Application
    Filed: June 13, 2007
    Publication date: December 18, 2008
    Applicant: Analog Devices, Inc.
    Inventors: Joern Soerensen, Carsten Griem, Carsten Pedersen
  • Patent number: 7466607
    Abstract: A de-coupled memory access system including a memory access control circuit is configured to generate first and second independent, de-coupled time references. The memory access control circuit includes a read initiate circuit responsive to the first time reference and a read signal for generating a read enable signal, and a write initiate circuit responsive to the second time reference and a write signal for generating a write enable signal independent of the read enable signal for providing independent, de-coupled write access to a memory array.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: December 16, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Paul W. Hollis, George M. Lattimore, Matthew B. Rutledge
  • Publication number: 20080304681
    Abstract: A MEMS microphone has a backplate with a given backplate aperture, and a diaphragm having a diaphragm aperture. The given backplate aperture is substantially aligned with the diaphragm aperture.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 11, 2008
    Applicant: ANALOG DEVICES, INC.
    Inventors: Eric Langlois, Thomas Chen, Xin Zhang, Kieran P. Harney
  • Publication number: 20080303703
    Abstract: A cross-coupled switched capacitor circuit that has two branches. During a first phase for the first branch, an input voltage is provided that causes charge to move through a resistor and to be placed onto a plate of the capacitor within the branch. An equivalent amount of charge is transferred to an output node. The output node may be a summing node of a sigma-delta modulator. The summing node is one of the inputs to an operational amplifier that is part of the integrator of the sigma-delta modulator. The resistor and the capacitor in the first branch define an RC circuit and corresponding RC time constant. During the first phase, the capacitor does not reach a fully settled voltage for a desired resolution. During the second phase, the capacitor in the first branch of the circuit is set to a defined voltage. The defined voltage may be the settling voltage had the capacitor been allowed to settle during the first phase.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 11, 2008
    Applicant: ANALOG DEVICES, INC.
    Inventors: Olafur Josefsson, Khiem Nguyen
  • Publication number: 20080303151
    Abstract: A method of packaging an integrated circuit singulates a wafer to form an integrated circuit, positions the integrated circuit on a carrier, and passivates the integrated circuit after the positioning the integrated circuit on the carrier. At this point, the integrated circuit is secured to the carrier. The method also electrically connects the integrated circuit to a plurality of exposed conductors.
    Type: Application
    Filed: June 8, 2007
    Publication date: December 11, 2008
    Applicant: ANALOG DEVICES, INC.
    Inventor: Jae Pil Yang
  • Patent number: 7463710
    Abstract: A fractional-N synthesizer with programmable output phase including a phase locked loop having an output signal whose frequency is a fractional multiple of an input reference signal, the phase locked loop including a frequency divider. A synchronization circuit responsive to the input reference signal for generating synchronization pulses at integer multiples of M periods of the input reference signal. An interpolator is responsive to F and M, where F is the fractional value and M is the modulus, to provide to the frequency divider an output which is a fractional value equal to, on average, the input fraction. A phase adjustment circuit is responsive to the synchronization circuit for varying the phase of the output signal with respect to the input reference signal.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: December 9, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Patrick Walsh, Michael F. Keaveney
  • Patent number: 7460786
    Abstract: A system and method transmits graphic data received at varying frequencies at a fixed data rate. The frequency dependent data and associated data clock signal are received and the frequency dependent data is converted to frequency independent data. A ratio of a number of data clock cycles to a number of reference clock cycles is determined and transmitted. The frequency independent data and header data are transmitted, at a fixed rate, to a receiver, the fixed rate being a frequency greater than the frequency of the associated data clock signal. The received the frequency independent data is converted to frequency dependent data based upon the received determined ratio. The communication channel may include an optical fiber and a tension member wherein control data is transmitted along the tension member and graphic data is transmitted along the optical fiber.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: December 2, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Rodney D. Miller, Charles O'Roark
  • Patent number: 7460490
    Abstract: A method for obtaining virtual path identifier, virtual channel identifier, and encapsulation values in an asynchronous transfer mode access device for a network using either non-static or static internet protocol address assignments and asynchronous transfer mode adaptation layer 5. In the non-static environment, a plurality of discovery packets are generated, but in the static environment, a plurality of address resolution protocol packets are generated. Headers are added to the plurality of packets, such that a first set of packets, each packet including a logical link control header, and a second set of packets, each packet including a virtual channel multiplexed header, are realized. The first and second sets of packets are encapsulated and then transmitted to a central office.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: December 2, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Massoud Hadjiahmad, Tuan Hoang, Andre Straker-Payne
  • Patent number: 7456853
    Abstract: Display structures and methods are provided that introduce redundancy and use this redundancy with different mapping rules on different interleaved display lines to visually diffuse display artifacts. The artifacts are typically produced by errors in the transmission and recovery of analog display signals that subsequently drive digital displays. This visual diffusion substantially reduces the display artifacts and, because these visual improvements require only one element (an ADC) in the display system to be configured at a higher resolution, the visual advantageous are realized with relatively low cost.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: November 25, 2008
    Assignee: Analog Devices, Inc.
    Inventor: Willard Kraig Bucklen
  • Patent number: 7457960
    Abstract: A processing system supporting a secure mode of operation is disclosed. The processing system includes a read-only hardware key that is only accessible in secure mode.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: November 25, 2008
    Assignee: Analog Devices, Inc.
    Inventor: Joshua Kablotsky
  • Publication number: 20080284406
    Abstract: In one aspect, a method of reducing power consumption in a circuit by adaptive bias current generation of a bias current configured to bias, at least in part, at least one amplifier of the circuit is provided. The method comprises establishing the bias current based, at least in part, on a reference frequency of a reference clock providing a clock signal to at least one component of the circuit, and changing the bias current in response to a change in the reference frequency of the at least one reference clock, the bias current being change non-linearly with respect to the change in the reference frequency of the at least one reference clock. In another aspect, the method comprises establishing the bias current based, at least in part, on a capacitance of a reference capacitor, and changing the bias current in response to a change in the capacitance of the reference capacitor such that the bias current is changed non-linearly with respect to changes in the capacitance of the reference capacitor.
    Type: Application
    Filed: May 19, 2008
    Publication date: November 20, 2008
    Applicant: Analog Devices, Inc.
    Inventor: Ronald A. Kapusta, JR.
  • Publication number: 20080284490
    Abstract: A method of compensating a monolithic integrated operational amplifier against process and temperature variations, such that the operational amplifier is suitable for use in an active filter, the method comprising a providing an amplifier having a first stage and an output stage, wherein the output stage drives an RC load, and wherein a compensation capacitor at an output of the first stage is selected so as to scale with the capacitance C of the RC load, and a transconductance of the first stage is a function of the resistance R of the RC load.
    Type: Application
    Filed: May 18, 2007
    Publication date: November 20, 2008
    Applicant: Analog Devices, Inc.
    Inventor: Bernard Tenbroek
  • Patent number: 7453309
    Abstract: The intercept of a logarithmic amplifier is temperature stabilized by generating a signal having the form H log H where H is a function of temperature such as T/T0. The first H factor is cancelled, thereby generating a correction signal having the form Y log H. The cancellation may be implemented with a transconductance cell having a hyperbolic tangent function. The H log H function may be generated by a pair of junctions biased by one temperature-stable current and one temperature-dependent current. The pair of junctions and the transconductance cell may be coupled together in a translinear loop. A user-accessible terminal may allow adjustment of the correction signal for different operating frequencies.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: November 18, 2008
    Assignee: Analog Devices, Inc.
    Inventor: Vincenzo DiTommaso
  • Patent number: 7453305
    Abstract: A voltage level shifting circuit (5) for shifting the common mode voltage of a differential signal to be within the working range of a differential input buffer circuit (3) comprises a first resistive voltage divider circuit (18) coupled between a first input terminal (10) and a voltage reference terminal (15) for receiving a voltage reference to which the common mode voltage of the level shifted differential signal is to be referenced, and a second resistive voltage divider circuit (18) coupled between a second input terminal (11) and the voltage reference terminal (15). The differential signal is applied to the first and second terminals (10,11), and the level shifted differential signal is produced on first and second output taps (17,19) of the first and second resistive voltage divider circuits (16,18) with the common mode of the level shifted differential signal referenced to the voltage reference applied to the voltage reference terminal (15).
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: November 18, 2008
    Assignee: Analog Devices, Inc.
    Inventors: Brian Anthony Moane, Colm Patrick Ronan, John Twomey