Patents Assigned to Analog Devices, Inc.
  • Publication number: 20180233264
    Abstract: Micro-fabricated coils are described. In some situations, the micro-fabricated coils include interleaved coils. In some situations, pairs of interleaved coils are stacked with respect to each other, separated by an insulating material. In some situations, the interleaved coils have an S-shape. The interleaved coils may be employed in a galvanic isolator.
    Type: Application
    Filed: August 25, 2017
    Publication date: August 16, 2018
    Applicant: Analog Devices, Inc.
    Inventor: Kenneth G. Richardson
  • Publication number: 20180231580
    Abstract: A microelectromechanical system (MEMS) accelerometer is described. The MEMS accelerometer is arranged to limit distortions in the detection signal caused by displacement of the anchor(s) connecting the MEMS accelerometer to the underlying substrate. The MEMS accelerometer may include masses arranged to move in opposite directions in response to an acceleration of the MEMS accelerometer, and to move in the same direction in response to displacement of the anchor(s). The masses may, for example, be hingedly coupled to a beam in a teeter-totter configuration. Motion of the masses in response to acceleration and anchor displacement may be detected using capacitive sensors.
    Type: Application
    Filed: February 7, 2018
    Publication date: August 16, 2018
    Applicant: Analog Devices, Inc.
    Inventor: William A. Clark
  • Patent number: 10050320
    Abstract: An integrated circuit has a substrate, a super-capacitor supported by the substrate, and a battery supported by the substrate. The super-capacitor includes a super-capacitor electrode and a shared electrode, and the battery has a battery electrode and the prior noted shared electrode. The super-capacitor and battery form at least a part of a monolithic integrated circuit.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: August 14, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Yangqi Jiang, Kuang L. Yang
  • Patent number: 10048714
    Abstract: In an example embodiment, a circuit is provided that includes a current source with a calibrated trim circuit whose output current varies with transconductance of the current source, and tracks a current mismatch between the current source and another current source under varying bias currents and temperatures. The trim circuit may include at least one calibration digital to analog converter (CAL DAC), which may be driven by a bias circuit generating current proportional to the transconductance of the current source. In an example embodiment, the trim circuit may include at least two CAL DACs, whose output current may vary with bias current only, and with bias current and temperature. A method to calibrate the CAL DACs includes varying calibration settings of the CAL DACs under different bias currents until the output current of the trim circuit substantially accurately tracks the current mismatch under disparate bias currents and temperatures.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: August 14, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventors: Haiyang Zhu, Wenhua W. Yang, Nathan T. Egan
  • Patent number: 10050744
    Abstract: A receiver apparatus models and corrects the frequency-dependent and the frequency-independent mismatches between I and Q paths jointly by polynomial estimations. The receiver apparatus may sample digitized I and Q path signals. The sampled data point may be modeled in equations with real and imaginary components. The sampled discrete time-domain data may be converted to frequency-domain data. Multiple statistics values based on the frequency-domain data may be computed. Coefficients for the polynomial equations may be estimated based on the computed statistic values. The channel mismatches may be estimated from the polynomial equations and used to compensate the mismatch either on the I path or the Q path.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: August 14, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventors: Wei An, Brian Reggiannini, Richard P. Schubert
  • Patent number: 10043792
    Abstract: An apparatus including an electrostatic discharge (ESD) protection device comprising a semiconductor having first, second and third regions arranged to form a transistor, wherein the first region is doped with a first impurity of a first conductivity type and is separated from the second region which is doped with a second impurity of a second conductivity type opposite the first type, and wherein a dimensional constraint of the regions defines an operational threshold of the ESD protection device. In one example, the separation between a collector and an emitter of a bipolar transistor defines a trigger voltage to cause the electrostatic discharge protection device to become conducting. In another example, a width of a bipolar transistor base controls a holding voltage of the electrostatic discharge protection device.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: August 7, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Edward John Coyne, Patrick Martin McGuinness, Paul Malachy Daly, Bernard Patrick Stenson, David J. Clarke, Andrew David Bain, William Allan Lane
  • Patent number: 10044386
    Abstract: Embodiments of the present disclosure provide mechanisms that enable designing an FIR filter that would have a guaranteed globally optimal magnitude response in terms of the minimax optimality criterion given a desired weight on the error in the stopband versus the passband. Design of such a filter is based on a theorem (“characterization theorem”) that provides an approach for characterizing the global minimax optimality of a given FIR filter h[n], n=0, 1, . . . , N, where optimality is evaluated with respect to a magnitude response of this filter, |H(ej?)|, as compared to the desired filter response, D(?), which is unity in the passband and zero in the stopband. The characterization theorem enables characterizing optimality for both real-valued and complex-valued filter coefficients, and does not require any symmetry in the coefficients, thus being applicable to all non-linear phase FIR filters.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: August 7, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventor: Sefa Demirtas
  • Patent number: 10038452
    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: July 13, 2017
    Date of Patent: July 31, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Baozhen Chen, Edward C. Guthrie, Michael C. W. Coln, Mark D. Maddox
  • Publication number: 20180212577
    Abstract: A common mode feedback (CMFB) loop for a differential amplifier sense an output common mode of a differential circuit and provides feedback to the gates of tail current transistors. Many CMFB loops cannot easily adjust the output common mode voltage and the output common mode may vary over process, voltage, and temperature. An improved CMFB circuit adds a control circuit to control backgates of tail current transistor device(s) of the differential circuit such that the output common mode voltage can be made adjustable.
    Type: Application
    Filed: January 3, 2018
    Publication date: July 26, 2018
    Applicant: Analog Devices, Inc.
    Inventors: Daniel F. KELLY, Franklin M. MURDEN, Daniel REY-LOSADA
  • Patent number: 10033212
    Abstract: Embodiments of the present invention are directed to improved battery packaging designs. The battery pack design may include a battery cell, a plurality of transistors, and a controller. The transistors may be coupled to the terminals of the battery cell in an H-bridge configuration. The controller may control the transistors to bypass the battery cell based on the current flowing between the output terminals of the battery pack. In such a manner, the controller may prevent damage to the battery cell and improve the overall safety of the battery pack in hazardous conditions. Moreover, the design may allow for more efficient charging/discharging of the cells that are most ready to accept/supply current.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: July 24, 2018
    Assignee: Analog Devices, Inc.
    Inventors: James C. Camp, Thomas M. MacLeod
  • Patent number: 10032976
    Abstract: In one embodiment, an apparatus includes a resonant structure having a plate, a drive electrode and a sense electrode. The resonant structure defines an axis substantially orthogonal to a plane defined by the plate when the resonant structure is not excited. The plate is formed from a piezoelectric material. The drive electrode is configured to excite the resonant structure, and the sense electrode is configured to sense a signal in response to rotation of the resonant structure about the axis.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: July 24, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Guiti Zolfagharkhani, Jan H. Kuypers, Alexei Gaidarzhy, Andrew Sparks
  • Patent number: 10033555
    Abstract: A system can be configured to control an equalizer circuit to equalize a data signal without requiring prior knowledge of the data signal's data rate. In an example, the system includes an equalizer circuit configured to equalize a data signal based on an equalizer control signal to produce an equalized signal, and a pattern detector configured to detect a specified data pattern in the equalized signal at each of multiple sampling rates. A control circuit can be configured to generate a preferred equalization control signal based on a sampling rate, selected from the multiple sampling rates, at which the pattern detector detects the specified data pattern in the equalized signal.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: July 24, 2018
    Assignee: Analog Devices, Inc.
    Inventor: Robert Schell
  • Patent number: 10027447
    Abstract: Circuits are used to sense and compensate or mitigate the imbalance errors, hence restoring the intended benefits of differential processing. In particular, the impedance mismatch between the positive and negative branches of a balanced system is sensed by digitizing an error voltage developed by injecting suitable common mode stimuli. The mismatch is then trimmed out by introducing and properly setting up a digitally controlled impedance that counters the original impedance mismatch and hence rebalances the signal path on-situ and prior to exercising the signal processing chain.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: July 17, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventor: Gabriele Manganaro
  • Patent number: 10025276
    Abstract: Embodiments of the present invention provide a motor-driven mechanical system with a detection system to measure properties of a back channel and derive oscillatory characteristics of the mechanical system. Uses of the detection system may include calculating the resonant frequency of the mechanical system and a threshold drive DTH required to move the mechanical system from the starting mechanical stop position. System manufacturers often do not know the resonant frequency and DTH of their mechanical systems precisely. Therefore, the calculation of the specific mechanical system's resonant frequency and DTH rather than depending on the manufacturer's expected values improves precision in the mechanical system use. The backchannel calculations may be used either to replace or to improve corresponding pre-programmed values.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: July 17, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventors: Colin Lyden, Javier Calpe-Maravilla, Mark Murphy, Eoin English, Denis Martin O'Connor, Tudor Vinereanu, Alan Cahill, Sean Brennan
  • Patent number: 10014826
    Abstract: Provided herein are apparatus and methods for power enhancement of self-biased distributed amplifiers with gate bias networks. By sampling output power a gate bias network with a filter network can adjust gate bias so as to improve the P1 dB compression point and the Psat saturation power level of a self-biased distributed amplifier. Advantageously the filter network can be derived using passive components thereby making it an easy to implement and cost effective approach to improve linearity and output power.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: July 3, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Peter J. Katzin, Haoyang Yu, Guogong Wang
  • Patent number: 10013543
    Abstract: A system, device, and method for binding metadata, such as information derived from the output of a biometric sensor, to hardware intrinsic properties by obtaining authentication-related metadata and combining it with information pertaining to a root of trust, such as a physical unclonable function. The metadata may be derived from a sensor such as a biometric sensor, the root of trust may be a physical unclonable function, the combination of the metadata and root of trust information may employ a hash function, and output from such a hash process may he used as an input to the root of trust. The combined information can he used in interactive or non-interactive authentication.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: July 3, 2018
    Assignee: Analog Devices, Inc.
    Inventors: John J. Walsh, John Ross Wallrabenstein
  • Patent number: 10008490
    Abstract: The disclosed technology relates to electronics, and more particularly, to protection devices that protect circuits from transient electrical events such as electrical overstress/electrostatic discharge. A protection device includes a semiconductor substrate having formed therein at least two wells and a deep well underlying and contacting the at least two wells. The device additionally includes a first PN diode formed in one of the at least two wells and having a first heavily doped region of a first conductivity type and a first heavily doped region of a second conductivity type, and includes a second PN diode formed in one of the at least two wells and having a second heavily doped region of the first conductivity type and a second heavily doped region of the second conductivity type. The device additionally includes a first PN diode and the second PN diode are electrically shorted by an electrical shorting structure to form a first plurality of serially connected diodes having a threshold voltage.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: June 26, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventors: Javier Alejandro Salcedo, Jonathan Pfeifer
  • Patent number: 10007823
    Abstract: Embodiments of the present disclosure provide code readers for reading codes provided as patterns imprinted on objects. Light interacts with a pattern by e.g. being reflected from or transmitted through the pattern, and at least some of the light that has interacted with the pattern is incident on photosensitive element(s) of one or more photodetectors of a code reader. The code reader employs centroid-measuring photodetector(s), i.e. photodetectors that detect light in such a manner that centroid of a pattern can be obtained directly from the photocurrents generated as a result of the photosensitive elements detecting light incident thereon. The code reader is then configured to process the detected light to determine a centroid of the pattern from the detected light and to decode data encoded in the pattern based on a position of the centroid. Such code readers are substantially less complex than camera-based devices and avoid mechanical scanning.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: June 26, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventors: Shrenik Deliwala, Alain Valentin Guery
  • Publication number: 20180172445
    Abstract: Micromachined inertial devices are presented having multiple linearly-moving masses coupled together by couplers that move in a linear fashion when the coupled masses exhibit anti-phase motion. The couplers move in opposite directions of each other, such that one coupler on one side of the movable masses moves in a first linear direction and another coupler on the opposite side of the movable masses moves in a second linear direction opposite the first linear direction. The couplers ensure proper anti-phase motion of the masses.
    Type: Application
    Filed: December 19, 2016
    Publication date: June 21, 2018
    Applicant: Analog Devices, Inc.
    Inventors: Igor P. Prikhodko, John A. Geen, Jeffrey A. Gregory
  • Publication number: 20180172447
    Abstract: Micromachined inertial devices are presented having multiple linearly-moving masses coupled together by couplers that move in a linear fashion when the coupled masses exhibit anti-phase motion. The couplers move in opposite directions of each other, such that one coupler on one side of the movable masses moves in a first linear direction and another coupler on the opposite side of the movable masses moves in a second linear direction opposite the first linear direction. The couplers ensure proper anti-phase motion of the masses.
    Type: Application
    Filed: December 19, 2016
    Publication date: June 21, 2018
    Applicant: Analog Devices, Inc.
    Inventors: Igor P. Prikhodko, John A. Geen, Jeffrey A. Gregory