Patents Assigned to Analog Devices
  • System and device for verifying the integrity of a system from its subcomponents
    Patent number: 9715590
    Abstract: A system and device for verifying the integrity of a system from its subcomponents, the system comprising a plurality of subcomponents each having a physical state, the system and the device comprising a processor that is connected to each of the subcomponents, the processor configured to verify systemic integrity by performing verification on some or all specified subcomponents. The verification may be individual (1,1) or threshold (n,1), and may be interactive or non-interactive.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: July 25, 2017
    Assignee: Analog Devices, Inc.
    Inventors: Douglas J. Gardner, John J. Walsh, John Ross Wallrabenstein
  • Dummy signal generation for reducing data dependent noise in digital-to-analog converters
    Patent number: 9716508
    Abstract: Mechanisms for generating dummy signals for use in reducing data dependent noise in DACs are disclosed. Disclosed mechanisms differentiate between odd and even bits of a digital data signal to be converted and generate dummy signals by inverting some of these bits and leaving other bits as they are (i.e. including them in their non-inverted form). One dummy signal is generated as a sequence of bits that is the same as a sequence of bits of a data signal except that every odd bit of the data signal is inverted. An alternative dummy signal is generated as a sequence of bits that is the same as a sequence of bits of a data signal except that every even bit is inverted. Generating dummy signals in this manner eliminates the need to use calibration, feedback, or transition detectors, advantageously resulting in increased timing margins and substantial power savings over existing implementations.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: July 25, 2017
    Assignee: ANALOG DEVICES GLOBAL
    Inventor: Lin Zhang
  • Variable gain amplifier
    Patent number: 9716479
    Abstract: The present disclosure provides an amplifier and associated methods of operations. An exemplary amplifier an input terminal; an output terminal; a first virtual ground node; a second virtual ground node; an operational amplifier coupled with the input terminal and the output terminal; a resistive input section coupled with an input of the operational amplifier; and a resistive feedback section coupled with an output of the operational amplifier. The resistive input section includes a fixed input resistor coupled with the input terminal and the first virtual ground node, and a switchable input resistor segment coupled with the fixed input resistor in parallel. The resistive feedback section includes a fixed feedback resistor coupled with the output terminal and the first virtual ground node, and a switchable feedback resistor segment coupled with the fixed feedback resistor in parallel.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: July 25, 2017
    Assignee: ANALOG DEVICES, INC.
    Inventor: Edward Perry Jordan
  • HIGHLY INTEGRATED RADIO FREQUENCY TRANSCEIVER
    Publication number: 20170207802
    Abstract: For small cells, transceivers demand high performance while maintaining system efficiency. The present disclosure describes a highly integrated cellular transceiver that offers such features by providing one or more digital functions on-chip, onto the same die in the cellular transceiver. Effectively, the scope and boundary of the cellular transceiver is expanded to move beyond the data converters of the transceiver to include a variety of digital functions, thus integrating more of the signal chain in the cellular transceiver. Integration can greatly reduce complexity for the baseband processing, lower the cost of the overall transceiver system, reduce power consumption, and at the same time, benefit from improvements on the digital functions through integration.
    Type: Application
    Filed: March 30, 2017
    Publication date: July 20, 2017
    Applicant: Analog Devices Global
    Inventors: PATRICK PRATT, Martin Steven McCORMICK
  • System, apparatus, and method for resonator and coriolis axis control in vibratory gyroscopes
    Patent number: 9709400
    Abstract: A gyroscope control circuit for a vibratory gyroscope system includes an open-loop RSP control circuit and a closed-loop CSP control circuit. The gyroscope control circuit optionally may include a Q compensation circuit to compensate for variations in gyroscope sensitivity due to variations in resonator signal path Q. The resonator signal path and the Coriolis signal path may have transduction factors that are proportional to each other such that sensitivity of the gyroscope varies directly with resonator signal path quality factor (Q).
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: July 18, 2017
    Assignee: Analog Devices, Inc.
    Inventor: Ronald Alan Kapusta
  • Local oscillator paths
    Patent number: 9712113
    Abstract: Provided herein are oscillator paths between an oscillator and mixers. In an embodiment, the oscillator paths include a first path between an oscillator and a first mixer and a second path between the oscillator and the second mixer, in which the first path is enabled in a first state (e.g., a low band state) and the second path is enabled in a second state (e.g., a high band state). The first path can include a radio frequency divider configured to receive a signal having the oscillator frequency and to divide the signal in frequency by a positive odd integer divisor greater than one, and a duty cycle correction circuit configured to receive an output from the radio frequency divider and provide an output having a duty cycle that is closer to 50% than the output from the divider. Such separate oscillator paths can, for example, enhance receiver performance.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: July 18, 2017
    Assignee: Analog Devices Global
    Inventor: Sivanendra Selvanayagam
  • Position determination techniques in resistive touch screen applications
    Patent number: 9710121
    Abstract: Systems and methods to determine locations for dual touch operations performed on a four-wire resistive touch screen. The systems and methods may include measuring signals from pairs of electrodes on each of a first and second resistive sheet of the resistive touch screen in two phases of operation. The systems and methods may further include determining touch screen segment resistances from the signal measurements. The systems and methods may determine locations corresponding to the dual touch operations from the resistances. The systems and methods may also determine locations from the signal measurements.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: July 18, 2017
    Assignee: ANALOG DEVICES, INC.
    Inventors: Javier Calpe Maravilla, Italo Carlos Medina, Maria Jose Martinez, Alberto Carbajo Galve
  • Apparatus and methods for biasing radio frequency switches
    Patent number: 9712158
    Abstract: Apparatus and methods for biasing radio frequency (RF) switches are provided herein. In certain configurations, an RF switching circuit includes a field effect transistor (FET) switch electrically connected between a first terminal and a second terminal, and an adaptive biasing circuit that generates a bias voltage used in part to bias a gate of the FET switch. The adaptive biasing circuit includes a low pass filter that generates a low pass filtered voltage based on low pass filtering a voltage of the first terminal, a buffer circuit that receives the low pass filtered voltage and generates a buffered voltage, and a voltage shifting circuit that generates the bias voltage by shifting the buffered voltage by an amount of voltage that depends on a state of a switch control signal.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: July 18, 2017
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Bilal Tarik Cavus, Ozgun Serttek
  • Method and apparatus for detecting linear and rotational movement
    Patent number: 9709595
    Abstract: A method of detecting motion provides a resonator having a mass, moves the mass in a translational mode, and actuates the mass in a given bulk mode. The mass moves in the translational and given bulk modes at substantially the same time and, accordingly, the resonator is configured to detect linear and rotational movement when moving and actuating the mass in the translational and given bulk modes. The method produces one or more movement signals representing the detected linear and rotational movement.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: July 18, 2017
    Assignee: Analog Devices, Inc.
    Inventors: Gaurav Vohra, John A. Geen
  • Incremental preloading in an analog-to-digital converter
    Patent number: 9712181
    Abstract: During operation of a SAR ADC, several of the MSBs can be preloaded with predetermined bit decisions prior to carrying out bit trials. A system and method can be provided for incrementally preloading the predetermined bit decisions such as to maintain voltages present at comparator inputs within a limited range of acceptable input voltages.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: July 18, 2017
    Assignee: Analog Devices, Inc.
    Inventors: Baozhen Chen, Edward C. Guthrie, Michael C. W. Coln, Mark D. Maddox
  • Closed loop control system, and an amplifier in combination with such a closed loop control system
    Patent number: 9705465
    Abstract: A control apparatus is provided that can provide high dynamic resolution and is suitable for inclusion within an integrated circuit. The control apparatus receives a demand signal representing a desired value of a measurand, and a feedback signal representing a present value or a recently acquired value of the measurand. The processing circuit forms a further signal a further signal which is a function of the demand and feedback signals. The further signal is then subjected to at least an integrating function. The demand signal, feedback signal or the further signal is processed or acquired in a sampled manner. The use of such sampled, i.e. discontinuous, processing allows integration time constants to be synthesized which would otherwise require the use of unfeasibly large components within an integrated circuit, or the use of off-chop components. Both of these other options are expensive.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: July 11, 2017
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Rares Andrei Bodnar, Patrick Joseph Pratt, Donal Bourke, Peter James Tonge
  • Self-heating trim techniques for improved LDO accuracy over load and temperature
    Patent number: 9703306
    Abstract: In one example, a method for compensating for a temperature effect during operation of a voltage regulator circuit includes applying a load current at an output of the voltage regulator circuit, measuring a first output voltage at the output, measuring a reference current or voltage, increasing the load current, measuring a change in the reference current or voltage corresponding to the increased load current, measuring a second output voltage when the measured change in the reference current exceeds a threshold, and determining a temperature coefficient (TC) value based on the measured second output voltage.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: July 11, 2017
    Assignee: Analog Devices, Inc.
    Inventors: Brandon Day, Mark Szostkiewicz
  • Lens-less optical position measuring sensor
    Patent number: 9702690
    Abstract: An optical detector may include an aperture, at least two photodetectors, and a measuring arrangement to quantify light detected at the photodetectors after passing through the aperture without the need for a lens. The aperture may be positioned between a light source and the two photodetectors to allow light from a light source to pass through the aperture to the photodetectors. The photodetectors may include PIN junction photodiodes and may be electrically isolated from each other, positioned next to each other in a side-by-side configuration, and then aligned with the aperture so that a proportion of the quantified light detected at the photodetectors changes as an angle of light from the light source incident to the aperture changes. Optical detectors and methods are provided.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: July 11, 2017
    Assignee: ANALOG DEVICES, INC.
    Inventor: Shrenik Deliwala
  • LOW-VOLTAGE LOW-POWER VARIABLE GAIN AMPLIFIER
    Publication number: 20170194911
    Abstract: In high speed communication applications, e.g., optical communication, a variable gain amplifier is used for input signal amplitude normalization or for linear equalization. Traditionally a bipolar Gilbert multiplier circuit is used. When moving towards a low-power application, a modified circuit topology is implemented to reduce the minimum supply voltage requirement of the variable gain amplifier while ensuring that bias current levels remain substantially the same and achieving the same current switching capacity as the traditional circuit. As a result, the power consumption of the circuit can be greatly reduced. The modified circuit topology combines the amplifier and gain transistors and achieves gain programming using a voltage difference of two pairs of floating voltage sources.
    Type: Application
    Filed: January 6, 2016
    Publication date: July 6, 2017
    Applicant: ANALOG DEVICES GLOBAL
    Inventor: Devrim AKSIN
  • Integrated device die and package with stress reduction features
    Patent number: 9698127
    Abstract: An integrated device die and package is disclosed. The integrated device die includes a unitary body. The unitary body can have an upper portion comprising one or more active components. The upper portion can have first and second opposing lateral sides defining at least a portion of a periphery of the upper portion such that an upper surface of the upper portion is disposed between upper edges of the first and second opposing lateral sides. The unitary body can also have a lower portion monolithically formed with the upper portion. The lower portion can comprise a pedestal extending downwardly from the upper portion. The pedestal can be laterally inset from lower edges of the first and second opposing lateral sides. The pedestal can include a distal end portion configured to couple to a carrier.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: July 4, 2017
    Assignee: ANALOG DEVICES, INC.
    Inventors: Thomas M. Goida, Xiaojie Xue
  • Charge sharing time domain filter
    Patent number: 9698759
    Abstract: An approach to time domain filtering uses a passive charge sharing approach to implement an infinite impulse response filter. Delayed samples of an input signal are stored as charges on capacitors of a first array of capacitors, and delayed samples of the output signal are stored as charges on capacitors of a second array of capacitors. Outputs are determined by passively coupling capacitors of the first and second arrays to one another, and determining the output according to a total charge on the coupled capacitors. In some examples, a gain is applied to the total charge prior to storing the output on the second array of capacitors. In some examples, a charge scaling circuit is applied to the charges stored on the arrays prior to coupling capacitors to form the output.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: July 4, 2017
    Assignee: ANALOG DEVICES, INC.
    Inventors: Eric Nestler, Jeffrey Venuti, Vladimir Zlatkovic, Kartik Nanda
  • Overvoltage protection device, and a galvanic isolator in combination with an overvoltage protection device
    Patent number: 9698594
    Abstract: Components can be damaged if they are exposed to excess voltages. A device is disclosed herein which can be placed in series with a component and a node that may be exposed to high voltages. If the voltage becomes too high, the device can autonomously switch into a relatively high impedance state, thereby protecting the other components.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: July 4, 2017
    Assignee: ANALOG DEVICES GLOBAL
    Inventor: Edward John Coyne
  • Thread offset counter
    Patent number: 9697005
    Abstract: In an example, there is disclosed a digital signal processor having a register containing a modular integer configured for use as a thread offset counter. In a multi-stage, pipelined loop, which may be implemented in microcode, the main body of the loop has only one repeating stage. On each stage, the operation executed by each thread of the single repeating stage is identified by the sum of a fixed integer and the thread offset counter. After each pass through the loop, the thread offset counter is incremented, thus maintaining pipelined operation of the single repeating stage.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: July 4, 2017
    Assignee: ANALOG DEVICES, INC.
    Inventor: Boris Lerner
  • Headset amplification circuit with error voltage suppression
    Patent number: 9699542
    Abstract: A headset driver circuit is described which comprises a connector interface. The connector interface comprises a first terminal, a second terminal and a third terminal for establishing respective electrical connections to a first speaker, a microphone and a common ground node of a headphone, earphone or headset, respectively. A first power amplifier is coupled to the first terminal to supply a first audio output signal to the first speaker of the headset. A first switch arrangement comprises a first ground switch is configured for selectively connecting and disconnecting the second terminal and a ground node of the headset driver circuit. The headset driver circuit further comprises a second ground switch configured for selectively connecting and disconnecting the third terminal and the ground node. The headset driver circuit also comprises a differential preamplifier, e.g.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: July 4, 2017
    Assignee: Analog Devices Global
    Inventors: Ulrik Sørensen Wismar, Sejun Kim
  • Apparatus and methods for generating a uniform magnetic field
    Patent number: 9697940
    Abstract: Apparatus and methods for generating a uniform magnetic field are provided herein. In certain configurations, a magnetic structure includes one or more pairs of magnets positioned within a housing. The magnets of each pair are arranged in parallel and include poles that are reversed in polarity relative to one another. For example, in certain implementations, a first pair of magnets includes a first magnet and a second magnet arranged side by side, with a north pole of the first magnet adjacent a south pole of the second magnet and with a south pole of the first magnet adjacent a north pole of the second magnet. The housing is implemented using a magnetic redirecting material, which can confine magnetic flux and reduce stray magnetic fields. The magnetic structure can be used to generate a magnetic field that is substantially uniform in a region of interest.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: July 4, 2017
    Assignee: Analog Devices Global
    Inventors: Alexander Perez Paran, Brigido Prudente Sarino, Jr., Darwin Punla Tolentino