Patents Assigned to Analog Devices, Inc.
  • Patent number: 11405046
    Abstract: Herein disclosed are multiple embodiments of a signal-processing circuit that may be utilized in various circuits, including conversion circuitry. The signal-processing circuit may receive an input and produce charges on multiple different capacitors during different phases of operation based on the input. The charges stored on two or more of the multiple different capacitors may be utilized for producing an output of the signal-processing circuit, such as by combing the charges stored on two or more of the multiple different capacitors. Utilizing the charges on the multiple different capacitors may provide for a high level of accuracy and robustness to variations of environmental factors, and/or a low noise level and power consumption when producing the output.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: August 2, 2022
    Assignee: ANALOG DEVICES, INC.
    Inventor: Jesper Steensgaard-Madsen
  • Patent number: 11398848
    Abstract: An embodiment of a communication circuit for communicating data across an isolation barrier may include an input circuit to receive a plurality of input data channels, a framing circuit to frame an input data packet from the plurality of input data channels, an encoding circuit to select a characteristic of a data symbol to represent a plurality of bits of the framed input data packet, and a driver circuit to drive one or more data symbols representing the framed input data packet onto an isolator configured to communicate data across the isolation barrier. The encoding circuit may select an amplitude, frequency or phase of the data symbol from a plurality of predetermined amplitudes, frequencies or phases, to encode the plurality of bits as the selected amplitude, frequency or phase.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: July 26, 2022
    Assignee: Analog Devices, Inc.
    Inventors: Bikiran Goswami, Baoxing Chen
  • Publication number: 20220231411
    Abstract: Systems, devices, and methods related to phase shifters are provided. An example true time-delay (TTD) phase shifter structure includes a signal conductive line disposed on a first layer of the structure; a first switchable ground plane comprising a first conductive plane disposed on a second layer of the structure; a second switchable ground plane comprising a second conductive plane disposed on a third layer of the structure, where the first, second, and third layers are separate layers of the structure; a first switch coupled between the first switchable ground plane and a first ground element, the first ground element disposed on the second layer; and a second switch coupled between the second switchable ground plane and a second ground element, the second ground element disposed on the third layer.
    Type: Application
    Filed: December 9, 2021
    Publication date: July 21, 2022
    Applicant: Analog Devices, Inc.
    Inventor: Hsin-Chang LIN
  • Publication number: 20220231391
    Abstract: Systems, devices, and methods related to phase shifters are provided. An example apparatus includes a first node to receive an input signal, a second node, a first signal path coupled between the first node and the second node, and a second signal path coupled between the first node and the second node. The first signal path includes a positively coupled transformer. The second signal path includes a negatively coupled transformer. The second signal path is out-of-phase with the first signal path at the second node. The apparatus further includes a plurality of switches to select the first signal path or the second signal path. The apparatus may further include tuning capacitors to improve phase-shifting performance of the apparatus.
    Type: Application
    Filed: December 15, 2021
    Publication date: July 21, 2022
    Applicant: Analog Devices, Inc.
    Inventors: Xudong WANG, Jinzhou CAO, Song LIN
  • Patent number: 11393806
    Abstract: A hybrid silicon carbide (SiC) device includes a first device structure having a first substrate comprising SiC of a first conductivity type and a first SiC layer of the first conductivity type, where the first SiC layer is formed on a face of the first substrate. The first device structure also includes a second SiC layer of a second conductivity type that is formed on a face of the first SiC layer and a first contact region of the first conductivity type, where the first contact region traverses the second SiC layer and contacts the first SiC. The device also includes a second device structure that is bonded to the first device structure. The second device structure includes a switching device formed on a second substrate and a second contact region that traverses a first terminal region of the switching device and contacts the first contact region.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: July 19, 2022
    Assignee: Analog Devices, Inc.
    Inventors: James G. Fiorenza, Puneet Srivastava, Daniel Piedra
  • Patent number: 11394301
    Abstract: For inductor-based DC-DC converters, a current shunt switch can provide an alternate path for the inductor current to flow that does not include the output capacitor. An amplifier circuit can be included and coupled with a control node of the current shunt switch to adjust a voltage on the control node to control an amount of inductor current diverted away from the output node. A fast linear loop can be included to ensure smooth transitions when engaging or disengaging the current shunt switch. These techniques can minimize the amount and duration of the subsequent negative output voltage excursion, which can be dependent on the specific ESL and ESR values of the output voltage capacitor, for the cases when the final value of the step-down load-transient is not zero. These techniques can improve a positive output voltage response caused by an output load transient in the negative direction.
    Type: Grant
    Filed: February 15, 2021
    Date of Patent: July 19, 2022
    Assignee: Analog Devices, Inc.
    Inventors: Eko Lisuwandi, Jinhuang Lu, Mark Robert Vitunic
  • Publication number: 20220224347
    Abstract: Uniformly-sampled, residue-generating analog-to-digital converters (ADCs), such as uniformly-sampled continuous-time pipelined ADCs, suffer from over-ranging of the residue signal, which can lead to severe signal distortion. Conventionally, power consuming techniques and oversampling are used to address the over-ranging problem. To reduce the range of the residue signal and reduce other impairments, an event-driven sub-quantizer (sub-ADC) and a sub-digital-to-analog converter (sub-DAC) can be implemented in at least one of the stages of the residue-generating ADC, to generate a continuous-time residue signal.
    Type: Application
    Filed: January 8, 2022
    Publication date: July 14, 2022
    Applicants: Analog Devices, Inc., Massachusetts Institute of Technology
    Inventors: Gabriele MANGANARO, Rishabh MITTAL, Hae-Seung LEE
  • Publication number: 20220224153
    Abstract: A contactless charging system for smart garments having coils whose centroids are not colinear. Folding a coil in half through its centroid will null out its inductance. A smart garment having 3 coils that have centroids that are not colinear is proposed. Accordingly, there is no single folding line that intersects all 3 centroids thereby nullifying inductance. Power can be combined with one or more rectifiers such that power is not cancelled. The present disclosure is suitable for any charging environment or apparatus, such as, drawer or hanger.
    Type: Application
    Filed: January 14, 2022
    Publication date: July 14, 2022
    Applicants: Analog Devices, Inc., UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Patrick RIEHL, Chin-Wei CHANG, Jenshan LIN
  • Publication number: 20220216836
    Abstract: Systems and methods are provided for architectures for a digital class D driver that increase the power efficiency of the class D driver. In particular, systems and methods are provided for a digital class D driver having a feedback analog-to-digital converter (ADC) that can have a latency of 1 cycle or more than 1 cycle. A feedback ADC with a latency of 1 cycle or more is significantly lower power than a low latency feedback ADC. Systems and methods are disclosed for a power efficient digital class D driver architecture that allows for a latency of one or more cycles in the feedback ADC.
    Type: Application
    Filed: March 23, 2022
    Publication date: July 7, 2022
    Applicant: Analog Devices, Inc.
    Inventor: Abhishek BANDYOPADHYAY
  • Publication number: 20220216861
    Abstract: The trend in wireless communication receivers is to capture more and more bandwidth to support higher throughput, and to directly sample the radio frequency (RF) signal to enable re-configurability and lower cost. Other applications like instrumentation also demand the ability to digitize wide bandwidth RF signals. These applications benefit from input circuitry which can perform well with high speed, wide bandwidth RF signals. An input buffer and bootstrapped switch are designed to service such applications, and can be implemented in 28 nm complementary metal-oxide (CMOS) technology.
    Type: Application
    Filed: October 18, 2021
    Publication date: July 7, 2022
    Applicant: Analog Devices, Inc.
    Inventor: Lawrence A. SINGER
  • Publication number: 20220216882
    Abstract: Systems and methods are provided for increasing efficiency of excess loop delay compensation in delta-sigma analog-to-digital converters. In some examples, systems and methods are provided for reducing total capacitance in an embedded excess loop delay compensation digital-to-analog converter (DAC) in a quantizer for a continuous time delta-sigma ADC. In other examples, the excess loop delay compensation DAC can be a current domain DAC, a charge domain DAC, or a voltage domain DAC. Additionally, methods are provided for digitally controlling the gain of an excess loop delay DAC. Furthermore, methods are provided to calibrate a gain mismatch between a main successive approximation register DAC and an excess loop delay DAC. The systems and methods provided herein improve performance of continuous time delta-sigma ADCs. Continuous time delta-sigma ADCs are high precision and power efficient ADCs, often used in audio playback devices and medical devices.
    Type: Application
    Filed: March 23, 2022
    Publication date: July 7, 2022
    Applicant: Analog Devices, Inc.
    Inventors: Akira SHIKATA, Abhishek BANDYOPADHYAY
  • Patent number: 11378689
    Abstract: A light detection and ranging (LIDAR) system comprises a laser diode; a laser diode driver circuit configured generate a laser beam using the laser diode and to frequency chirp the generated laser beam according to a frequency chirp period; a laser splitter to split the generated laser beam into N transmit laser beams pointed at different angles, wherein N is an integer greater than one, and a frequency chirp period of each of the N transmit laser beams is the frequency chirp period of the generated laser beam; and multiple return beam paths to receive N return beams and determine time of flight values for the N return beams in parallel.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: July 5, 2022
    Assignee: Analog Devices, Inc.
    Inventors: Tyler Adam Dunn, Andrew William Sparks, Michael Ziemkiewicz, Miles R. Bennett
  • Patent number: 11381216
    Abstract: Wideband baluns with enhanced amplitude and phase balance are provided. The wideband balun includes a first transmission line connected between a first port and a third port, and a second transmission line connected between a second port and a fourth port, and a third transmission line connected between the third port and a reference voltage, such as ground. To enhance phase and/or amplitude balance of the wideband balun, the wideband balun further includes a compensation structure operable to provide at least one of capacitive compensation or inductive compensation to balance the wideband balun. For example, in certain implementations, the compensation structure includes at least one of (i) a capacitor connected between the first port and the second port or (ii) a fourth transmission line connected between the first transmission line and the third port.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: July 5, 2022
    Assignee: Analog Devices, Inc.
    Inventors: Song Lin, Mir A. Faiz, Xudong Wang, Donghyun Jin, Bin Hou
  • Publication number: 20220209946
    Abstract: Described herein are techniques of remotely performing key revocation on a device that cannot communicate outside of a local network of the device. The techniques involve including key revocation instructions in software update instructions that are sent to the device. The device may verify the software update instructions using one or more keys to determine whether they are safe for execution on the device. For example, the device may verify that the software update instructions have been sent by a trusted software provider. The device may execute the key revocation instructions included in the software update instruction to revoke use of a key of the key(s), and initiate use of a new key in place of the revoked key.
    Type: Application
    Filed: December 10, 2021
    Publication date: June 30, 2022
    Applicant: Analog Devices, Inc.
    Inventors: Jonathan Noah Simon, Tze Lei Poo
  • Publication number: 20220209721
    Abstract: Various examples are directed to a frequency-compensated amplifier circuit comprising a first multi-stage amplifier comprising a first amplifier input node, a first amplifier output node, and a first amplifier intermediate node. A first feedback path between the first amplifier input node and the first amplifier output node comprises a feedback resistance. A second feedback path between the first amplifier output node and the first amplifier intermediate node comprises a first capacitor and a portion of the feedback resistance. A first switch circuit may be electrically coupled to the first capacitor and to the feedback resistance. The first switch circuit may have a first state in which the first capacitor is coupled to a first tap point of the feedback resistance and the portion of the feedback resistance has a first value.
    Type: Application
    Filed: February 11, 2021
    Publication date: June 30, 2022
    Applicant: Analog Devices, Inc.
    Inventors: David James Plourde, Quan Wan
  • Publication number: 20220206072
    Abstract: One embodiment is a method for estimating an internal temperature of a battery, the method comprising obtaining multiple terminal impedance measurements, wherein each of the terminal impedance measurements is taken at a different one of a plurality of frequencies; determining model parameters for a multivariable polynomial regression model; and applying the multivariable polynomial regression model to the multiple terminal impedance measurements to estimate the internal temperature of the battery.
    Type: Application
    Filed: March 18, 2022
    Publication date: June 30, 2022
    Applicant: Analog Devices, Inc.
    Inventors: Frank YAUL, Sunrita PODDAR, Hemtej GULLAPALLI, Omer TANOVIC
  • Patent number: 11374803
    Abstract: Quadrature error correction (QEC) for radio transceivers are provided herein. In certain embodiments, a transceiver includes an in-phase (I) signal path including a first controllable amplifier coupled to a first data converter, and a quadrature-phase (Q) signal path including a second controllable amplifier coupled to a second data converter. The transceiver further includes a QEC circuit operable to correct for a quadrature error between the I signal path and the Q signal path by adjusting a gain of the first controllable amplifier and/or a gain of the second controllable amplifier.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: June 28, 2022
    Assignee: Analog Devices, Inc.
    Inventors: Omar A S Abdel Fattah, Christoph M. Steinbrecher
  • Publication number: 20220200351
    Abstract: A contactless charging drawer for smart garments using magnetic coupling links. A frame with a primary coil creates a magnetic field which couples with a secondary coil disposed a drawer. Smart garments, or any device, can then be safely charged in the drawer. The combination provides for a wireless power charging environment while adding an extra degree of freedom in impedance transformation without the need for electrical contacts to the drawer.
    Type: Application
    Filed: December 20, 2021
    Publication date: June 23, 2022
    Applicants: Analog Devices, Inc., UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Patrick RIEHL, Chin-Wei CHANG
  • Publication number: 20220196542
    Abstract: A structural electronics wireless sensor node is provided that includes layers of electronic components fabricated from patterned nanostructures embedded in an electrically conductive matrix. In some aspects, the structural electronics wireless sensor node includes a plurality of nanostructure layers that each form individual electronic components of the structural electronics wireless sensor node. In certain embodiments, the structural electronics wireless sensor node includes electronic components such as a resistor, a inductor, a capacitor, and/or an antenna.
    Type: Application
    Filed: March 9, 2022
    Publication date: June 23, 2022
    Applicants: Analog Devices, Inc., Massachusetts Institute of Technology
    Inventors: Brian L. Wardle, Yosef Stein, Estelle Cohen, Michael Murray
  • Publication number: 20220196699
    Abstract: A microelectromechanical systems (MEMS) accelerometer is provided, comprising a substrate disposed in a plane defined by a first axis and a second axis perpendicular to the first axis; a first proof mass and a second proof mass coupled to the substrate and configured to translate in opposite directions of each other along a third axis perpendicular to the first and second axes; and at least one lever coupling the first proof mass to the second proof mass, wherein, the MEMS accelerometer is configured to detect acceleration along the third axis via detection of translation of the first and second proof masses along the third axis; and the MEMS accelerometer exhibits symmetry about the first and second axes.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 23, 2022
    Applicant: Analog Devices, Inc.
    Inventors: Kemiao Jia, Xin Zhang, Michael Judy