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    RC oscillator
    1.
    发明授权
    RC oscillator 有权

    公开(公告)号：US11750198B2

    公开(公告)日：2023-09-05

    申请号：US17564595

    申请日：2021-12-29

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Yanqin Chen ,  Chunbiao Wu ,  Yongwang Liu ,  Bingzhao Zhang

    IPC: H03L7/02

    CPC classification number: H03L7/02

    Abstract: Embodiments of this application disclose an RC oscillator that amplifies a difference between a first voltage and a second voltage by using a first amplifier and a second amplifier. The first amplifier may include a first amplification circuit and a second amplification circuit. The first amplification circuit and the second amplification circuit may share a same voltage-current conversion circuit. The RC oscillator disclosed in the embodiments of this application not only avoids noise introduced by the first amplifier, but also reduces internal noise of the RC oscillator and a jitter of a clock signal.

    Phase-Locked Loop Circuit, Data Recovery Circuit, and Control Method for Phase-Locked Loop Circuit
    3.
    发明申请
    Phase-Locked Loop Circuit, Data Recovery Circuit, and Control Method for Phase-Locked Loop Circuit 有权
    锁相环电路，数据恢复电路和锁相环路控制方法

    公开(公告)号：US20170077933A1

    公开(公告)日：2017-03-16

    申请号：US15268120

    申请日：2016-09-16

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Bingzhao Zhang ,  Yongwang Liu

    IPC: H03L7/08 ,  H04L7/033 ,  H03L7/099 ,  H03L7/089 ,  H03L7/093

    CPC classification number: H03L7/0807 ,  H03L7/087 ,  H03L7/0891 ,  H03L7/093 ,  H03L7/099 ,  H03L7/101 ,  H03L7/1075 ,  H03L2207/06 ,  H04L7/0331

    Abstract: A phase-locked loop circuit, which includes a phase frequency detector, a charge pump, a loop low-pass filter, a first voltage-current converter, a second voltage-current converter, a current-controlled oscillator, a frequency divider, a comparator, and a mode controller, where the mode controller is configured to control the switches S1, S2, and S3 included in the loop low-pass filter to connect or disconnect. Using the phase-locked loop circuit, a voltage value of a second control voltage signal VC2 provided for the first voltage-current converter can reach, in a relatively short time, a voltage value of a first control voltage signal VC1 provided for the second voltage-current converter, thereby increasing a speed of establishing the phase-locked loop circuit and implementing a quick response of the phase-locked loop circuit.

    Abstract translation: 一种锁相环电路，包括相位频率检测器，电荷泵，环路低通滤波器，第一电压 - 电流转换器，第二电压 - 电流转换器，电流控制振荡器，分频器， 比较器和模式控制器，其中模式控制器被配置为控制包括在环路低通滤波器中的开关S1，S2和S3连接或断开。 使用锁相环电路，为第一电压 - 电流转换器提供的第二控制电压信号VC2的电压值在较短的时间内可以达到为第二电压提供的第一控制电压信号VC1的电压值 从而提高建立锁相环电路的速度并实现锁相环电路的快速响应。

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