Patents Assigned to Analog Devices Global
  • Multiple string, multiple output digital to analog converter
    Patent number: 9941894
    Abstract: A multiple output, multiple impedance string digital-to-analog converter (DAC) circuit can provide a first output having a first resolution in response to a first digital input signal and a second output having a second resolution in response to a second digital input signal. A main impedance string and a secondary impedance string can be coupled using switching networks to provide a first DAC output. By coupling additional switches to the main impedance string and by sharing the main impedance string, a second DAC output can be realized.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: April 10, 2018
    Assignee: Analog Devices Global
    Inventors: Shurong Gu, Dennis A. Dempsey, GuangYang Qu, Hanqing Wang, Tony Yincai Liu
  • Current measurement
    Patent number: 9939464
    Abstract: The present invention relates to current measurement apparatus 100. The current measurement apparatus 100 comprises a measurement arrangement 110, 114 which is configured to be disposed in relation to a load 108 which draws a current signal, the measurement arrangement being operative when so disposed to measure the load drawn current signal. The current measurement apparatus 100 also comprises a signal source 112 which is operative to apply a reference input signal to the measurement arrangement 110, 114 whereby an output signal from the measurement arrangement comprises a load output signal corresponding to the load drawn current signal and a reference output signal corresponding to the reference input signal.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: April 10, 2018
    Assignee: Analog Devices Global
    Inventors: Stephen James Martin Wood, Jonathan Ephraim David Hurwitz, Seyed Amir Ali Danesh
  • Capacitance measurement
    Patent number: 9939476
    Abstract: Embodiments of the present invention may provide a method of measuring an unknown capacitance of a device. The method may comprise the steps of driving a test signal to a circuit system that includes a current divider formed by the device with unknown capacitance and a reference capacitor; mirroring a current developed in the reference capacitor to a second circuit system that includes a measurement impedance; measuring a voltage within the second circuit system; and deriving a capacitance of the unknown capacitance based on the measured voltage with reference to a capacitance of the reference capacitor and the measurement impedance.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: April 10, 2018
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Christian Steffen Birk, John A. Cleary, David Sayago Montilla, Elizabeth A. Lillis, Padraig O'Connor, Eoin E. English, Patrick Pratt, Kathleen Embrechts, Wim Rens, Jan Crols
  • Digital-to-analog converter with improved linearity
    Patent number: 9941897
    Abstract: A higher accuracy ADC circuit (e.g., in which the number of bits of the ADC circuit is twelve or greater) may need calibration multiple times during its working life to avoid bit weight errors. Described are techniques to address DAC element ratio errors between DAC element clusters in a DAC circuit in order to maintain the linear performance of analog-to-digital converter (ADC) circuits and digital-to-analog converter (DAC) circuits.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: April 10, 2018
    Assignee: Analog Devices Global
    Inventors: Hongxing Li, Roberto Sergio Matteo Maurino
  • Isolator and method of forming an isolator
    Patent number: 9941565
    Abstract: An isolator device and a corresponding method of forming the isolator device to include first and second electrodes, a layer of first dielectric material between the first and second electrodes, and at least one region of second dielectric material between the layer of first dielectric material and at least one of the first and second electrodes. The second dielectric material has a higher relative permittivity than the first dielectric material.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: April 10, 2018
    Assignee: Analog Devices Global
    Inventors: Conor John McLoughlin, Michael John Flynn, Laurence B. O'Sullivan, Shane Geary, Stephen O'Brien, Bernard P. Stenson, Baoxing Chen, Sarah Carroll, Michael Morrissey, Patrick M. McGuinness
  • Current measurement
    Patent number: 9933463
    Abstract: The present invention relates to current measurement apparatus. The current measurement apparatus comprises first and second measurement devices with each of the first and second measurement devices being operative to measure current in a respective one of a live conductor and a neutral conductor substantially simultaneously. The current measurement apparatus is operative to make plural different determinations in dependence on the substantially simultaneous current measurements.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: April 3, 2018
    Assignee: Analog Devices Global
    Inventors: Seyed Amir Ali Danesh, Jonathan Ephraim David Hurwitz
  • Reducing reference charge consumption in analog-to-digital converters
    Patent number: 9935648
    Abstract: To reduce the overall reference charge needed to perform operations, analog-to-digital converters can maintain reference voltage connections of the bit trial capacitors of the digital-to-analog converter (DAC) from the end of a current conversion to just prior to the beginning of the next acquisition phase. At the start of the next acquisition phase, the bottom plates of the bit trial capacitors of the DAC can be shorted to generate a common mode voltage. As the conversion phase begins, the bottom plates of the sampling capacitors are disconnected from the input voltage and the bottom plates of each bit trial capacitor are shorted to generate input common-mode voltage. As bit trials progress, the shorts between the bottom plates of the bit trial capacitors are removed and the bit trial results are applied to the bottom plates of the bit trial capacitors.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: April 3, 2018
    Assignee: Analog Devices Global
    Inventors: Maitrey Kamble, Arvind Madan, Sandeep Monangi
  • FET—bipolar transistor combination, and a switch comprising such a FET—bipolar transistor combination
    Patent number: 9935628
    Abstract: A transistor switch device is provided that exhibits relatively good voltage capability and relatively easy drive requirements to turn the device on and off. This can reduce transient drive current flows that may perturb other components.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: April 3, 2018
    Assignee: Analog Devices Global
    Inventor: Edward John Coyne
  • Insulating structure, a method of forming an insulating structure, and a chip scale isolator including such an insulating structure
    Patent number: 9929038
    Abstract: A method of forming an insulating structure, comprising forming an insulating region comprising at least one electrical or electronic component or part thereof embedded within the insulating region, and forming a surface structure in a surface of the insulating region.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: March 27, 2018
    Assignee: Analog Devices Global
    Inventor: Laurence Brendan O'Sullivan
  • Method of controlling a motor driven system, apparatus for controlling a motor driven system and a motor driven system controlled in accordance with the disclosed method
    Patent number: 9927680
    Abstract: Actuators are used to move a variety of objects to desired positions. It is generally desirable that they can do this quickly without exhibiting overshoot or ringing. Some actuators are required to respond very quickly and examples of these are voice coil drivers used to move lenses in autofocus cameras provided in everyday devices such as smart phones and tablets. A rapid two step controller scheme had already been disclosed by Analog Devices Inc. While the scheme works well, it can only be used reliably if the resonant frequency of the actuator is known to within 2 or 3%. The inventors have discovered that the resonant frequency of an actuator unexpectedly changes as a function of position. This disclosure provides ways of modifying the control scheme to cope with changes in resonant frequency.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: March 27, 2018
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Javier Calpe Maravilla, Eoin E. English, Rafael Mahiques, Jose Carlos Canada, Maria Jose Martinez
  • Apparatus and methods for a difference amplifier
    Patent number: 9917558
    Abstract: Apparatus and methods for a difference amplifier are provided. In certain examples, the difference amplifier can provide high common mode rejection without differential signal attenuation. In an example, a difference amplifier circuit can include first and second amplifiers, first and second buffer amplifiers, a first feedback voltage divider coupled between an output of the first buffer amplifier and an output of the second amplifier, and a second feedback voltage divider coupled between an output of the second buffer amplifier and an output of the first amplifier.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: March 13, 2018
    Assignee: Analog Devices Global
    Inventor: Andreas Koch
  • Method of and apparatus for transmit noise reduction at a receiver
    Patent number: 9912358
    Abstract: A method of reducing the noise from a transmitter at an associated receiver is disclosed. Noise contributions in active channels are identified and used to update a shared noise cancellation filter. Excluding signals from inactive channels speeds up the filter convergence to a near optimal solution. Sharing a filter across multiple channels reduces component count and power consumption.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: March 6, 2018
    Assignee: Analog Devices Global
    Inventors: Patrick Joseph Pratt, Peadar Antony Forbes
  • Embedded overload protection in delta-sigma analog-to-digital converters
    Patent number: 9912144
    Abstract: Delta-sigma modulators do not handle overload well, and often become unstable if the input goes beyond the full-scale range of the modulator. To provide overload protection, an improved technique embeds an overload detector in the delta sigma modulator. When an overload condition is detected, coefficient(s) of the delta sigma modulator is adjusted to accommodate for the overloaded input. The improved technique advantageously allows the delta sigma modulator to handle overload gracefully without reset, and offers greater dynamic range at reduced resolution. Furthermore, the coefficient(s) of the delta sigma modulator can be adjusted in such a way to ensure the noise transfer function is not affected.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: March 6, 2018
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Trevor Clifford Caldwell, Corey Petersen, David Nelson Alldred, Hajime Shibata
  • Flash analog-to-digital converter calibration
    Patent number: 9912342
    Abstract: An analog-to-digital converter (ADC) is a device that can include a reference shuffler and a loop filter. An ADC can achieve better performance with incremental adjustment of a pointer of the reference shuffler, changing coefficients of the loop filter, and storing calibration codes of the ADC in a non-volatile memory. By incrementally adjusting a pointer of the reference shuffler, a calibration can be performed more efficiently than with a random adjustment of the pointer. By temporarily changing the loop filter coefficients, a greater amount of activity can be introduced into the loop filter. This activity can allow the calibration to proceed more efficiently. By storing the calibration codes in a non-volatile memory, a search space for calibration codes can be reduced. Thus, a calibration can occur more quickly, and the calibration itself can be improved.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: March 6, 2018
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Zhao Li, Hajime Shibata, Trevor Clifford Caldwell, Yunzhi Dong, Jialin Zhao, Richard E. Schreier, Victor Kozlov, David Nelson Alldred, Prawal Man Shrestha
  • MEMS switch device and method of fabrication
    Patent number: 9911563
    Abstract: A MEMS switch device including: a substrate layer; an insulating layer formed over the substrate layer; and a MEMS switch module having a plurality of contacts formed on the surface of the insulating layer, wherein the insulating layer includes a number of conductive pathways formed within the insulating layer, the conductive pathways being configured to interconnect selected contacts of the MEMS switch module.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: March 6, 2018
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: John G Macnamara, Padraig L. Fitzgerald, Raymond C Goggin, Bernard P Stenson
  • METHODS OF MANUFACTURE OF AN INDUCTIVE COMPONENT AND AN INDUCTIVE COMPONENT
    Publication number: 20180061569
    Abstract: The disclosure relates to the manufacture of inductive components, in particular transformers, using a combination of microfabrication techniques and discrete component placement. By using a prefabricated core, the core may be made much thicker than one that is deposited using microfabrication techniques. As such, saturation occurs later and the efficiency of the transformer is improved. This is done at a much lower cost than the cost of producing a thicker core by depositing multiple layers using microfabrication techniques.
    Type: Application
    Filed: August 26, 2016
    Publication date: March 1, 2018
    Applicant: Analog Devices Global
    Inventors: Jan Kubík, Bernard Patrick Stenson, Shane Patrick Geary, Michael Noel Morrissey
  • Compensation of baseline wander
    Patent number: 9906211
    Abstract: A circuit for compensation of baseline voltage wander operating at an input of an isolator is disclosed. The circuit can compensate electronically the frequency response of an isolation circuit (e.g., a transformer) by increasing the pass band in the low frequency region in order to minimize the baseline wander caused by low inductance windings. The compensation circuit can be used to inject a current ramp proportional to the amplitude and the duration of the pulse and inversely proportional to the open circuit inductance of the isolation circuit.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: February 27, 2018
    Assignee: Analog Devices Global
    Inventor: Miguel Ángel Fernández Robayna
  • Adjusting phase of a digital phase-locked loop
    Patent number: 9893734
    Abstract: Aspects of this disclosure relate to a digital phase-locked loop (DPLL) arranged to adjust output phase using a phase adjustment signal. In certain embodiments, the phase adjustment signal can be received in a signal path from an output of a time-to-digital converter of the DPLL to an input to the digitally controlled oscillator of the DPLL. Some embodiments relate to adjusting the output phase of the DPLL to reduce a relative phase difference between the output phase of the DPLL and an output phase of another DPLL.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: February 13, 2018
    Assignee: Analog Devices Global
    Inventors: Vamshi Krishna Chillara, Declan M. Dalton
  • High isolation wideband switch
    Patent number: 9893025
    Abstract: A high isolation wideband switch is disclosed. In one aspect, the switch includes an integrated circuit package having an integrated circuit die with a first plurality of leads that is positioned on a package substrate that has a second plurality of leads. The first leads of the integrated circuit die are connected to the second the leads of the package substrate via bond wires and a first electrical coupling occurs between the first leads and the integrated circuit die in response to an RF signal applied to the integrated circuit package. The bond wires have a second electrical coupling in response to the RF signal and the bond wires are arranged such that the second electrical coupling is matched to the first electrical coupling within a selected frequency band so as to reduce the overall electrical coupling of the integrated circuit package for RF signals within the selected frequency band.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: February 13, 2018
    Assignee: Analog Devices Global
    Inventors: Yusuf Alperen Atesal, Turusan Kolcuoglu
  • Windowless H-bridge buck-boost switching converter
    Patent number: 9893623
    Abstract: A “windowless” H-bridge buck-boost switching converter includes a regulation circuit with an error amplifier which produces a ‘comp’ signal, a comparison circuit which compares ‘comp’ with a ‘ramp’ signal, and logic circuitry which receives the comparison circuit output and a mode control signal indicating whether the converter is to operate in buck mode or boost mode and operates the primary or secondary switching elements to produce the desired output voltage in buck or boost mode, respectively. A ‘ramp’ signal generation circuit operates to shift the ‘ramp’ signal up by a voltage Vslp(p?p)+Vhys when transitioning from buck to boost mode, and to shift ‘ramp’ back down by Vslp(p?p)+Vhys when transitioning from boost to buck mode, thereby enabling the converter to operate in buck mode or boost mode only, with no need for an intermediate buck-boost region.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: February 13, 2018
    Assignee: Analog Devices Global
    Inventor: Hirohisa Tanabe