知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

256 records (took 0.014 seconds)

    Controlling an oscillating system
    1.
    发明授权
    Controlling an oscillating system 有权

    公开(公告)号：US11592534B2

    公开(公告)日：2023-02-28

    申请号：US16909098

    申请日：2020-06-23

    Applicant: Infineon Technologies AG

    Inventor： David Brunner ,  Georg Schitter ,  Han Woong Yoo

    IPC: G01S7/481 ,  G02B26/08 ,  H03B5/06 ,  G02B26/10 ,  H03B5/30 ,  H03L3/00 ,  G01S7/497

    Abstract: A system includes a power driver, configured to generate an electric excitation; an oscillating system, configured to perform an oscillation induced by the electric excitation; a feedback detector, configured to detect a feedback measurement signal with to the oscillation; and a controller configured to operate: in a closed loop mode, to control the power driver to generate the electric excitation as a discontinuous electric excitation according to timing information obtained from the detected feedback measurement signal, to synchronize the discontinuous electric excitation with the detected feedback measurement signal; in a learning mode preceding the closed loop mode, to control the power driver to generate the electric excitation as a continuous electric excitation, to obtain timing information from the feedback measurement signal to be used, at least once, in the subsequent closed loop mode, to synchronize the discontinuous electric excitation with the detected feedback measurement signal.

    Oscillator circuit with bias current generator
    3.
    发明授权
    Oscillator circuit with bias current generator 有权

    公开(公告)号：US10826500B2

    公开(公告)日：2020-11-03

    申请号：US16412777

    申请日：2019-05-15

    Applicant: Telefonaktiebolaget LM Ericsson (publ)

    Inventor： Janne Peltonen ,  Christian Elgaard ,  Anna-Karin Stenman

    IPC: H03L3/00 ,  H03B5/32 ,  H03L5/00

    Abstract: An oscillator circuit comprises a crystal oscillator arranged to generate an oscillation signal, a bias current generator arranged to supply a bias current to the crystal oscillator, and a feedback stage arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator is arranged to: in response to a supply of power to the oscillator circuit being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator, supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.

    Clock circuit and method for recalibrating an injection oscillator coupled to kick-start a crystal oscillator
    4.
    发明授权
    Clock circuit and method for recalibrating an injection oscillator coupled to kick-start a crystal oscillator 审中-公开

    公开(公告)号：US10673383B2

    公开(公告)日：2020-06-02

    申请号：US16136739

    申请日：2018-09-20

    Applicant: Silicon Laboratories Inc.

    Inventor： Matthew Powell ,  Sudipta Sarkar

    IPC: H03B5/06 ,  H03B5/36 ,  H03L3/00 ,  H03K21/38

    Abstract: Embodiments of clock circuits disclosed herein include a crystal oscillator circuit, an injection oscillator coupled to kick-start the crystal oscillator circuit and a digital frequency calibration circuit coupled to recalibrate the injection oscillator. The crystal oscillator circuit is configured to generate a clock signal at a resonant frequency. The injection oscillator is coupled to supply an oscillation signal at an injection frequency to the crystal oscillator circuit to reduce a start-up time of the crystal oscillator circuit. The digital frequency calibration circuit is coupled to receive the resonant frequency and the injection frequency as inputs, and configured to supply a digital control signal to the injection oscillator to set the injection frequency of the injection oscillator substantially equal to the resonant frequency of the crystal oscillator circuit. Methods are provided herein to recalibrate the injection frequency of an injection oscillator over time, temperature and/or supply voltage.

    Crystal oscillator control circuit and associated oscillation device
    5.
    发明授权
    Crystal oscillator control circuit and associated oscillation device 有权

    公开(公告)号：US10666196B2

    公开(公告)日：2020-05-26

    申请号：US16238491

    申请日：2019-01-02

    Applicant: Artery Technology Co., Ltd.

    Inventor： Baotian Hao ,  Weitie Wang ,  Chao Li

    IPC: H03B5/36 ,  H03L3/00 ,  H03B5/06

    Abstract: A crystal oscillator control circuit includes a first terminal and a second terminal, a current source, and a peak detection and bias voltage adjustment circuit. The first terminal and the second terminal are arranged to couple the crystal oscillator control circuit to a crystal. The current source is coupled to a power supply voltage and generates a bias current. The peak detection and bias voltage adjustment circuit is coupled between the bias current and a ground voltage and coupled to the first terminal, and performs peak detection and bias voltage adjustment to correspondingly generate a first signal at a node. The low-pass filter low-pass filters the first signal to generate a filtered signal. The feedback control circuit is arranged to perform feedback control according to the filtered signal to generate an oscillation signal at one or both of the first terminal and the second terminal.

    CRYSTAL OSCILLATOR CIRCUIT
    7.
    发明申请
    CRYSTAL OSCILLATOR CIRCUIT 有权

    公开(公告)号：US20170288680A1

    公开(公告)日：2017-10-05

    申请号：US15436892

    申请日：2017-02-20

    Applicant: Semiconductor Manufacturing International (Shanghai) Corporation ,  Semiconductor Manufacturing International (Beijing) Corporation

    Inventor： Er Yuan FENG ,  Zhen Jiang SU ,  Zhen Ye GUO

    IPC: H03L3/00 ,  H03B5/32

    Abstract: A crystal oscillator circuit is provided. The crystal oscillator circuit includes an oscillator start-up circuit having a first output terminal and a second output terminal, where the second output terminal outputs a first oscillation signal; and a waveform conversion circuit configured to convert the first oscillation signal to a rectangular wave signal. The crystal oscillator circuit also includes a first current source configured to output a first current to drive the oscillator start-up circuit; and a second current source configured to output a second current, and being connected in parallel with the first current source to jointly drive the oscillator start-up circuit. Further the crystal oscillator circuit includes a pulse generation circuit configured to generate a control pulse signal to control the second current source to output the second current after power on and to stop outputting the second current after a preset time.

Patent Agency Ranking