Patents Assigned to Dialog Semiconductor
  • Calibration of vectors in a measurement system
    Patent number: 10955435
    Abstract: A method of data calibration, and in particular sensor calibration, which involves gathering an initial first estimate and then binning the data samples, so that calibration can be performed without the need for a known reference stimulus. The present disclosure relates to calibration of vectors in a measurement system, and in particular to calibration of a correction function for systematic errors in successive data vectors. There is provided a method of determining a vector calibration function comprising: binning successive data vectors; and optimising the binned data vectors once data vectors allocated to a minimum number of unique bins have been observed. The method comprises establishing an initial calibration estimate and where the binning and optimising are performed based on said initial calibration estimate.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: March 23, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventors: Wessel Lubberhuizen, Ashley Hughes
  • Optocoupler current transfer ratio compensation
    Patent number: 10958177
    Abstract: A flyback converter is disclosed having a secondary side controller that generates an input current for an optocoupler diode by driving a variable resistor with a control voltage. The secondary side controller varies a variable resistance for the variable resistor to compensate for current transfer ratio gain variations for the optocoupler.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: March 23, 2021
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Tao Li, Pengju Kong, Juyoung Yoon, Qingqing Zong
  • Digital filter
    Patent number: 10951229
    Abstract: A digital filter and a method for filtering a pulse density modulation (PDM) signal are presented. The digital filter has a first filter circuit to receive an input signal with input values at successive time steps to provide a filtered input signal with filtered values at successive time steps. The digital filter does not require sample-rate or data format conversions. Also, the digital filter is area and power efficient when implemented in hardware. Optionally, the digital filter has a sigma-delta modulator including the quantiser, the sigma-delta modulator being used to receive the filtered input signal and to process the filtered input signal before and/or after being quantised by the quantiser. This digital filter does not require sample-rate or data format conversions. This digital filter is area and power efficient when implemented in hardware.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: March 16, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventors: Ashley Hughes, Wessel Harm Lubberhuizen
  • Crystal oscillator with fast start-up
    Patent number: 10951166
    Abstract: The present document relates to oscillator circuits and a method. An oscillator circuit generates an oscillating voltage signal, wherein the crystal has a first electrode and a second electrode. The oscillator circuit has a power source with a supply terminal and a reference terminal. The oscillator circuit has a switching circuit arranged between the power source and the crystal. The switching circuit, in a start-up phase, alternately connects the supply terminal of the power source to the first and second electrode of the crystal such that an amplitude of the oscillating voltage signal is increased.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: March 16, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventors: Marinus Wilhelmus Kruiskamp, Bram Verhoef
  • Power saving method and device thereof in internet-of-things
    Patent number: 10952140
    Abstract: The power saving method includes storing current connection information of an electronic device corresponding to an access point; disconnecting power supply to designated hardware to form a disconnection state after storing the current connection information; determining whether the disconnection state conforms to a release condition; and connecting the power supply to the designated hardware if the disconnection state conforms to the release condition. The connecting of the power supply to the designated hardware includes loading final connection information of the electronic device corresponding to the access point prior to disconnecting the power supply, and utilizing the final connection information to guide the electronic device to connect the access point.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: March 16, 2021
    Assignee: Dialog Semiconductor Korea Inc.
    Inventor: Chang Hawn Park
  • Low power microcontroller
    Patent number: 10948970
    Abstract: A low power microcontroller that includes a low power node controller adapted to retrieve data from peripheral devices is presented. The microcontroller contains a state machine coupled to a storage medium, which is adapted to store a set of instructions executable by the state machine. The microcontroller also contains a power domain controller, which is adapted to enable the state machine upon receipt of a notification signal. As an option, the microcontroller contains a plurality of communication controllers for communicating with a plurality of external devices, wherein the power domain controller includes a register which may be read by the state machine to identify a communication controller among the plurality controllers. Also, a method of operating a microcontroller for use with an external device is presented. The method provides a state machine which executes a set of instructions.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: March 16, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventors: Nikolaos Moschopoulos, Konstantinos Georgios Kottikas, Dimitrios Bekiaris
  • Beacon signal processing system and filtering method of reducing wake-up frequency
    Patent number: 10945207
    Abstract: A beacon signal processing system of reducing wake-up frequency periodically receives a beacon signal from an access point. The beacon signal processing system, according to a data transfer type of a traffic indication message contained in the beacon signal, maintains a sleep mode or only wakes up part of modules of hardware and software necessary for communication for processing.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: March 9, 2021
    Assignee: Dialog Semiconductor Korea Inc.
    Inventors: Won Man Kim, Chang Hwan Park
  • Multi-standard BCPM demodulator using Viterbi algorithm
    Patent number: 10924311
    Abstract: The present document relates to a Viterbi-based GFSK (Gaussian frequency-shift keying) demodulator that supports different modulation index ranges. In particular, the present document relates to a circuit and a corresponding method for demodulating a base band signal. For example, the base band signal may have an in-phase component and a quadrature component. The method includes determining a phase-modulated signal based on the base band signal. The method includes determining a scaled phase signal by scaling the phase-modulated signal using a scaling factor. The method includes determining discrimination signals based on the scaled phase signal using a periodic discrimination function. The method includes applying a Viterbi algorithm to the discrimination signals for determining an output signal.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: February 16, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventor: Hamed Kenawy
  • Initialization of memory in a computer system
    Patent number: 10921999
    Abstract: A computer system, especially but not exclusively an embedded system, is provided with a CPU and an external FLASH or other memory which is used for storing code to be executed by the CPU in operation of the system. The system can be initialized without requiring a secondary boot sequence which means it can be used in preference to embedded or serial FLASH solutions. There is provided a computer system comprising: a processor; an external memory, being external to the processor; a memory controller for the external memory; and a power management unit which is arranged to receive a wake up signal, then to first wake up the memory controller; and secondly at a later time to wake up the processor.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: February 16, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventors: Nikolaos Moschopoulos, Dimitrios Papadopoulos, Jakko Verhallen
  • Two phase time difference of arrival location
    Patent number: 10914814
    Abstract: A method for a device for determining the location of a mobile transmitting device using a two phase time difference of arrival method and to a system using such a device are presented. There is a first radio node for calculating a location of a third radio node, for receiving, from the third radio node, a first ranging signal and for calculating, based on the first ranging signal, a first ranging parameter. The first radio node receives, from a second radio node, a second ranging signal, transmits to the second radio node a third ranging signal, calculates a phase offset between the first and second radio nodes based on the second and third ranging signals, and calculates a distance between the first and third radio nodes based on the phase offset between the first and second radio nodes based on the first ranging parameter.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: February 9, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventors: Joek de Haas, Sean McGrath
  • Auxiliary winding ground fault detection for isolated DC/DC converter
    Patent number: 10917018
    Abstract: A flyback converter is provided with a controller that is configured to analyze the reflected feedback voltage waveforms to determine the presence of a ground connection fault for the auxiliary winding.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: February 9, 2021
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Pengju Kong, Duc Doan, Fuqiang Shi
  • Wireless local area network power saving method and access point
    Patent number: 10917844
    Abstract: A wireless local area network power saving method and an access point are provided. The access point implements a sleep mode regardless of whether the access point connects to a station. Furthermore, the access point sets different access point wake-up time period depending on the situation whether the access point connects to the base station or not such that power saving effect is enhanced.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: February 9, 2021
    Assignee: Dialog Semiconductor Korea Inc.
    Inventors: Kyung Sik Cho, Beom Jin Kim
  • WLAN station capable of optimizing power saving operation
    Patent number: 10912022
    Abstract: The present disclosure discloses a power saving optimization method and device for an access point of a wireless local area network. The present embodiment discloses a power saving optimization method and device for optimizing the weak wakeup interval, a value of the weak awake time period, and a predicted value of power consumption between a station and an access point associated, in order to optimize power saving when the station performs operations in a low power mode, so as to maintain a sleep mode over a long period of time to a maximum extent without data loss in the low power mode.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: February 2, 2021
    Assignee: Dialog Semiconductor Korea Inc.
    Inventors: Jae Ho Kim, Chang Hwan Park, Jeong Hwan Lee
  • Single inductor multiple output regulator with hybrid negative and positive rail generation
    Patent number: 10910947
    Abstract: DC-DC voltage regulators for converting an input voltage into one or more output voltages and methods for operating such voltage regulators are described. The voltage regulator may have a high side switching device coupled between the input port and a first intermediate node. The voltage regulator may have an inductive element having one port coupled to the first intermediate node and may have a capacitive element having two ports, coupled between the first intermediate node and a second intermediate node, with its one port coupled to the first intermediate node. The voltage regulator may have a charging switching device coupled between the other port of the capacitive element and a predetermined voltage level, for charging the capacitive element when the high side switching device and the charging switching device are both in an ON state.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: February 2, 2021
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Pier Cavallini, Nicola Macri, Kemal Ozanoglu
  • Method and apparatus for charge recycling
    Patent number: 10897151
    Abstract: A method and an apparatus for charge recycling. The method is comprised of the steps of receiving a charge at an energy storage element from a parasitic component, storing the charge at the energy storage element, and providing the charge stored at the energy storage element to a power supply's input or output. The step of receiving the charge at the energy storage element includes operating a discharging switch to selectively couple the parasitic component with the energy storage element and receiving the charge at the energy storage element via the discharging switch when the energy storage element and the parasitic component are coupled.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: January 19, 2021
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Zhenyu Song, Junyue Sun, Nailong Wang, Ze Han, Xiaogang Zhao
  • Signal generator with coherent phase output
    Patent number: 10886905
    Abstract: A signal generator and a method which provides a source signal with a coherent phase at arbitrary times is presented. There is provided a signal generator for generating a source signal based on a reference signal. The signal generator has a phase setting circuit with a memory circuit operable between a plurality of states. The memory circuit has a phase setting input adapted to receive a phase setting value to set the memory circuit to a known state. The signal generator is adapted to load the phase setting value at a specific time to control a phase of the source signal.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: January 5, 2021
    Assignee: Dialog Semiconductor B.V.
    Inventors: Duan Zhao, Michail Papamichail, Joek de Haas
  • Power converter
    Patent number: 10886834
    Abstract: A power converter and a method for receiving an input voltage and providing an output voltage is presented. The power converter has a switching circuit to generate the output voltage. The switching circuit has a first switch, a switch control circuit arranged to selectively operate the first switch in a first state or a second state. There is a ripple reduction circuit to set a first state duration based on a property of a load current. The load current is a current that the power converter provides to a load that is coupled to the output voltage.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: January 5, 2021
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Der Ju Hung, Yu Ta Lin, Yuan Wen Hsiao, Chi-Chia Huang, Chia Wen Tsai
  • Low power signal generator
    Patent number: 10873334
    Abstract: A low power signal generator and a method for generating at least one source signal based on a reference signal having a reference frequency is presented. The signal generator has a divider circuit having a resonant frequency. The generator has an adjuster adapted to adjust the resonant frequency. The divider circuit has an input to receive the reference signal and an output for providing the source signal. The divider circuit is adapted to divide the reference frequency of the reference signal by a coefficient, such that the source signal has a source frequency that is less than the reference frequency.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: December 22, 2020
    Assignee: Dialog Semiconductor B.V.
    Inventor: Michail Papamichail
  • IoT device having low power consumption mode and operating method thereof
    Patent number: 10873908
    Abstract: An IoT device having a low power consumption mode and an operating method thereof are disclosed. An objective in accordance with an aspect of an embodiment is to provide an IoT device wirelessly communicating, without a gateway, with a terminal by only a repeater and an operating method thereof.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: December 22, 2020
    Assignee: Dialog Semiconductor Korea Inc.
    Inventors: Sang Hak Chung, Sang Joon Lee, Dong Woo Jang
  • High efficiency multi-level buck-boost converter
    Patent number: 10868469
    Abstract: A power converter for converting an input voltage at an input port into an output voltage at an output port of the power converter is described. The power converter comprises an inductor having a first inductor port and a second inductor port, wherein the second inductor port is coupled to the output port. Furthermore, the power converter comprises a flying capacitor having a first capacitor port and a second capacitor port, and a switching cell. In addition, the power converter comprises a control unit to operate the switching cell in a first sequence of operation phases to perform step-up conversion; and in a second sequence of operation phases to perform step-down conversion.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: December 15, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Holger Petersen