Patents Assigned to Analog Devices
  • PHOTO-DIODE EMULATOR CIRCUIT FOR TRANSIMPEDANCE AMPLIFIER TESTING
    Publication number: 20180335509
    Abstract: Embodiments of the present disclosure provide an optical range finder that includes a transimpedance amplifier (TIA) and a photodiode emulation circuitry for testing the TIA. The photodiode emulation circuitry may be coupled to an input port of the TIA and configured to receive one or more parameters specifying one or more characteristics of a test current signal to be provided to the TIA. The photodiode emulation circuitry may further be configured to provide the test current signal in accordance with the one or more parameters to the input port of the TIA while the photodiode is also coupled to the input port of the TIA.
    Type: Application
    Filed: March 23, 2018
    Publication date: November 22, 2018
    Applicant: Analog Devices Global
    Inventors: Devrim AKSIN, Yalcin Alper EKEN
  • Method of and apparatus for learning the phase error or timing delays within a current transducer and power measurement apparatus including current transducer error correction
    Patent number: 10132846
    Abstract: Current transducers are widely used in current measuring systems. They provide good isolation between the supply voltage and the measurement equipment. However they can introduce small phase errors which can become significant sources of error if the current to a load is out of phase with the supply voltage for the load. This disclosure discusses a robust measurement apparatus and method that can be used in situ to monitor for and correct phase errors.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: November 20, 2018
    Assignee: Analog Devices Global
    Inventors: Jonathan Ephraim David Hurwitz, Seyed Amir Ali Danesh, William Michael James Holland, Shaoli Ye
  • Apparatus and methods for compensating radio frequency transmitters for local oscillator leakage
    Patent number: 10135472
    Abstract: Apparatus and methods for compensating radio frequency (RF) transmitters for local oscillator (LO) leakage are provided herein. In certain configurations herein, a transmitter generates an RF transmit signal based on mixing an input signal with an LO signal. Additionally, the transmitter is calibrated to compensate for LO leakage, which provides a number of benefits, including lower levels of undesired emissions from the transmitter.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: November 20, 2018
    Assignee: Analog Devices Global
    Inventor: Ahmed Mohammad Ashry Othman
  • ADC with capacitive difference circuit and digital sigma-delta feedback
    Patent number: 10135459
    Abstract: A low power high precision mixed signal analog to digital converter is provided for processing biometric signals in the presence of a large interferer signal for cableless patient monitoring; a capacitive difference circuit produces an analog difference signal by differencing an analog feedback loop signal and an input signal; an analog-to-digital converter sigma delta converter produces a digital version of the difference signal, a digital feedback loop includes a digital integrator and a capacitive digital-to-analog converter configured to produce the analog loop feedback signal based upon the digital version of the difference.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: November 20, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Yogesh Jayaraman Sharma, Arthur J. Kalb
  • Hybrid beamsteerer for steering a light beam with both sub-aperture and full-aperture beam steering portions
    Patent number: 10133083
    Abstract: A non-mechanical beamsteerer can be provided to adjust an angle of a light beam, such as to scan the light beam over a field of regard. The non-mechanical beamsteerer can include a first collection of steering elements that are smaller than a size of a light beam. The first collection of steering elements can adjust the angle of the light beam by diffracting the light beam. The non-mechanical beamsteerer can also include a second collection of steering elements that are larger than a size of the light beam. The second collection of steering elements can adjust an angle of the light beam by refracting the light beam. The non-mechanical beamsteerer can operate without a compensation plate, such as to provide a reduced size of the beamsteerer and an increased acceptance angle of the beamsteerer.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: November 20, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Michael Ziemkiewicz, Michael Howard Anderson, Scott Robert Davis, Benjamin Luey, Tyler Adam Dunn
  • Mechanically isolated MEMS device
    Patent number: 10131538
    Abstract: A MEMS device has a substrate with a structure surface and an opposing exterior surface, microstructure formed on the structure surface of the substrate, and a cap coupled with the substrate to form a hermetically sealed interior chamber containing the microstructure. The substrate forms a trench extending from, and being open to, the opposing exterior surface to produce a sensor region and a second region. Specifically, the second region is radially outward of the sensor region. The MEMS device also has a spring integrally formed at least in part within the trench to mechanically connect the sensor region and the second region, and other structure integral with the substrate. The spring or the other structure at least in part hermetically seal the interior chamber.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: November 20, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Bradley C. Kaanta, Kemiao Jia
  • System and method for reducing false preamble detection in a communication receiver
    Patent number: 10129011
    Abstract: An apparatus comprising: a signal detection circuit determine a count reached by a counter between successive detected edge signals and to provide an indication of whether successive detected edge signals are separated from each other by at least a prescribed time interval; a clock circuit that produces clock signal pulses in response to a provided indication of an occurrence of a succession of detected edge signals each separated from a previous edge signal of the succession by at least the prescribed time interval; phase matching circuitry configured to align the produced clock signal pulses with detected edge signals; and a pattern matching circuit that that samples a sequence of detected edge signals aligned with the produced clock signal pulses to detect a data packet.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: November 13, 2018
    Assignee: Analog Devices Global
    Inventors: Muhammad Kalimuddin Khan, Kenneth J. Mulvaney, Philip P. E. Quinlan, Shane O'Mahony
  • Active antenna calibration
    Patent number: 10128894
    Abstract: Aspects of this disclosure relate to active antenna calibration. In some embodiments, a local oscillator signal can be injected into the receive path for misalignment measurement and calibration of the receive path, a transmit signal from a transmit path can be coupled to a receive path, and the transmit path can be calibrated relative to the receive path.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: November 13, 2018
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Michael W. O'Brien, Michael F. Keaveney, Emil Ivanov Entchev, James Breslin
  • Correlated double sampling analog-to-digital converter
    Patent number: 10128859
    Abstract: Techniques are described to cancel kT/C sampling noise and residue amplifier sampling noise while also reducing power consumption in a pipelined analog-to-digital converter circuit.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: November 13, 2018
    Assignee: Analog Devices Global Unlimited Company
    Inventors: Sanjay Rajasekhar, Roberto Sergio Matteo Maurino
  • Coupled-line balun with common-mode nulling
    Patent number: 10122341
    Abstract: Coupled-line baluns with common-mode compensation are provided herein. In certain configurations, a series resistor-inductor (RL) network is connected to ports of a coupled-line balun to null the common-mode transmission coefficient at a desired frequency. This extends performance at lower frequencies by improving the low frequency amplitude and phase balance of the device. The inductor and resistor can be connected in series between one of the differential terminals and a single-ended grounded terminal. This advantageously can null the common-mode transmission at a specific frequency near a minimum length-dominated frequency so as to enhance the common-mode rejection at lower frequencies.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: November 6, 2018
    Assignee: Analog Devices, Inc.
    Inventor: Andrew Pye
  • Reference precharge techniques for analog-to-digital converters
    Patent number: 10122376
    Abstract: Systems and methods to reduce the amount of reference current drawn by a SAR ADC by including an auxiliary or precharge reference source. The ADC can connect the bit trial capacitors of a main digital-to-analog converter (DAC) to an auxiliary or precharge reference source during the loading of the bit trials, and then the ADC can switch to a main reference buffer. After allowing enough time for both phases, the main DAC can proceed with the bit trials to resolve the remaining bits. The rest of the bit trials can be performed directly using the main reference buffer.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: November 6, 2018
    Assignee: Analog Devices Global
    Inventors: Anoop Manissery Kalathil, Arvind Madan, Sandeep Monangi
  • Array of sub-aperture refractive elements for steering a light beam
    Patent number: 10120261
    Abstract: The present subject matter includes apparatus and techniques that can be used to reduce losses in systems that perform steering of a light beam. Such steering can be performed in a non-mechanical manner, such as using an electrically-controlled optical structure (e.g., an electro-optical structure). For example, a waveguide can be used to adjust an angle of a light beam (e.g., steer the light beam). The waveguide can include a core, a cladding including an electro-optic material, and electrodes defining an arrangement that, when selectively energized, adjusts an index of refraction of the electro-optic material. In particular, electrode arrangements as described herein can be used to reduce losses, such as losses that would occur due to diffraction.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: November 6, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Michael Ziemkiewicz, Scott Robert Davis, Michael Howard Anderson, Tyler Adam Dunn
  • Operational amplifier
    Patent number: 10116268
    Abstract: The amplifier circuit includes a pair of differential input stages coupled to an output stage where both a selected input stage and an unselected input stage are active with one of either a differential input signal or a reference voltage. A switching network couples a first input differential signal to a first differential input stage and a reference voltage to a second differential input stage when an amplifier input signal is less than a threshold voltage. The switching circuit also couples the second input differential signal to the second differential input stage and the reference voltage to the first differential input stage when the amplifier input signal is greater than the threshold signal.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: October 30, 2018
    Assignee: Analog Devices Global
    Inventors: Sharad Vijaykumar, Gerard Mora-Puchalt
  • Communication unit, integrated circuit and method for generating a plurality of sectored beams
    Patent number: 10116368
    Abstract: A communication unit comprises a plurality of antenna element feeds (203, 205) for coupling to a plurality of antenna elements of an antenna array, where each antenna element feed comprises at least one coupler; and a plurality of transmitters operably coupled to the plurality of antenna element feeds. At least one transmitter of the plurality of transmitters comprises: an input for receiving a first signal and at least one second signal; beamformer logic arranged to apply independent beamform weights (RefBF1, RefBF2) on the first signal and the at least one second signal of the transmitter respectively, wherein each of the independent beamform weights is allocated on a per sector basis; and a signal combiner arranged to combine the first signal and the second signal to produce a combined signal, such as that the combined signal supports a plurality of sectored beams.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: October 30, 2018
    Assignee: Analog Devices Global
    Inventors: Conor O'Keeffe, Michael O'Brien, Sean Sexton
  • ANALOG-TO-DIGITAL CONVERTERS FOR LIDAR SYSTEMS
    Publication number: 20180306908
    Abstract: Embodiments of the present disclosure propose analog-to-digital conversion (ADC) systems particularly suitable for Light Detection and Ranging (LIDAR) implementations. An exemplary proposed ADC system is configured to determine whether an absolute value of an analog value is greater than a threshold, and, upon positive determination, assign a predetermined digital value as a digital value corresponding to the analog value, without proceeding with the analog-to-digital conversion of the analog value. Because the ADC system only proceeds with the analog-to-digital conversion, using an ADC, when the input analog value is smaller than the threshold, and otherwise the input analog value is simply assigned some predefined digital value, design complexity and power consumption of the system may be significantly reduced, compared to conventional ADCs used in LIDAR applications.
    Type: Application
    Filed: November 17, 2016
    Publication date: October 25, 2018
    Applicant: Analog Devices Global
    Inventors: Libo Meng, Jun Mo, Yu Liu, Wei Wang, Ke Yun
  • Voltage controlled current path, a voltage clamp, and an electronic component including a voltage clamp
    Patent number: 10110206
    Abstract: According to a first aspect of this disclosure there is provided a voltage controlled current path. The voltage controlled current path comprises a first stage arranged to conduct current once the voltage at an input node of the first stage exceeds a threshold value. The amount of current that passes through the first stage is a function of the voltage at the input node. A second stage is arranged to pass a current that is a function of the current passing through the first stage.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: October 23, 2018
    Assignee: Analog Devices Global
    Inventors: Derek J. Hummerston, Christopher Peter Hurrell
  • Multi-carrier base station receiver
    Patent number: 10111280
    Abstract: Embodiments of the present invention may provide a receiver. The receiver may include an RF section, a local oscillation signal generator to generate quadrature local oscillation signals, and a quadrature mixture, coupled to the RF section, to downconvert a first group of wireless signals directly to baseband frequency quadrature signals and to downconvert a second group of wireless signals to intermediate frequency quadrature signals. The receiver may also include a pair of analog-to-digital converters (ADCs) to convert the downconverted quadrature signals to corresponding digital quadrature signals. Further, the receiver may include a digital section having two paths to perform signal processing on the digital baseband frequency quadrature signals and to downconvert the digital intermediate frequency signals to baseband cancelling a third order harmonic distortion therein.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: October 23, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventors: Antonio Montalvo, Kevin G. Gard
  • RANDOMIZED TIME-INTERLEAVED DIGITAL-TO-ANALOG CONVERTERS
    Publication number: 20180302100
    Abstract: A time-interleaved digital-to-analog converter (DAC) uses M DAC cores to convert a digital input signal whose digital input words are spread to different DAC cores to produce a final analog outputs. The M DAC cores, operating in a time-interleaved fashion, can increase the sampling rate several times compared to the sampling rate of just one DAC. However, sequential time-interleaving DAC cores often exhibit undesirable spurs at the output. To spread those spurs to the noise floor, the time-interleaving DAC cores can be selected at a pseudo randomized manner or in a specific manner which can break up the sequential or periodic manner of selecting the DAC cores.
    Type: Application
    Filed: April 11, 2018
    Publication date: October 18, 2018
    Applicant: Analog Devices, Inc.
    Inventors: Gil ENGEL, Shawn S. KUO, Steven C. ROSE
  • USB isolator with advanced control features
    Patent number: RE47097
    Abstract: A USB-based isolator system conveys USB signals between a pair of galvanically isolated circuit systems and supports controlled enumeration by a downstream device on upstream USB signal lines. The isolator system provides a multi-mode voltage regulator to support multiple voltage supply configurations. The isolator system further provides control systems for each of the isolated circuit systems and provides robust control in a variety of start up conditions. Additionally, the isolator system includes refresh timers and watchdog mechanisms to support persistent operation but manage possible communication errors that can arise between the isolated circuit systems.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: October 23, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Eric C. Gaalaas, Mark Stewart Cantrell
  • USB isolator with advanced control features
    Patent number: RE47098
    Abstract: A USB-based isolator system conveys USB signals between a pair of galvanically isolated circuit systems and supports controlled enumeration by a downstream device on upstream USB signal lines. The isolator system provides a multi-mode voltage regulator to support multiple voltage supply configurations. The isolator system further provides control systems for each of the isolated circuit systems and provides robust control in a variety of start up conditions. Additionally, the isolator system includes refresh timers and watchdog mechanisms to support persistent operation but manage possible communication errors that can arise between the isolated circuit systems.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: October 23, 2018
    Assignee: Analog Devices, Inc.
    Inventors: Eric C. Gaalaas, Mark Stewart Cantrell