FREQUENCY CALIBRATION DEVICE AND METHOD FOR PROGRAMMABLE OSCILLATOR
    1.
    发明申请
    FREQUENCY CALIBRATION DEVICE AND METHOD FOR PROGRAMMABLE OSCILLATOR 有权
    频率校准装置及可编程振荡器的方法

    公开(公告)号:US20130051439A1

    公开(公告)日:2013-02-28

    申请号:US13617514

    申请日:2012-09-14

    IPC分类号: H04L7/04

    摘要: A frequency calibration method for a programmable oscillator includes the steps of: counting an oversampling number of an oversampling signal and estimating an accumulated bit number of a USB data stream according to the oversampling signal; calculating a difference between the oversampling number and M times of the accumulated bit number when the accumulated bit number is larger than a predetermined value; and determining a frequency calibration step of the oversampling signal according to the difference. The present invention further provides a frequency calibration device for a programmable oscillator.

    摘要翻译: 可编程振荡器的频率校准方法包括以下步骤:对过采样信号的过采样数进行计数,并根据过采样信号估计USB数据流的累积比特数; 当所述累积比特数大于预定值时,计算所述累加比特数的所述过采样数和M次之间的差; 以及根据所述差异确定过采样信号的频率校准步骤。 本发明还提供了一种用于可编程振荡器的频率校准装置。

    FREQUENCY CALIBRATION DEVICE AND METHOD FOR PROGRAMMABLE OSCILLATOR
    2.
    发明申请
    FREQUENCY CALIBRATION DEVICE AND METHOD FOR PROGRAMMABLE OSCILLATOR 有权
    频率校准装置及可编程振荡器的方法

    公开(公告)号:US20110115568A1

    公开(公告)日:2011-05-19

    申请号:US12948265

    申请日:2010-11-17

    IPC分类号: H03L7/00

    CPC分类号: H03L7/0807 H03L7/099

    摘要: A frequency calibration method for a programmable oscillator includes the steps of: counting an oversampling number of an oversampling signal and estimating an accumulated bit number of a USB data stream according to the oversampling signal; calculating a difference between the oversampling number and M times of the accumulated bit number when the accumulated bit number is larger than or equal to a predetermined value; and determining a frequency calibration step of the oversampling signal according to the difference. The present invention further provides a frequency calibration device for a programmable oscillator.

    摘要翻译: 可编程振荡器的频率校准方法包括以下步骤:对过采样信号的过采样数进行计数,并根据过采样信号估计USB数据流的累积比特数; 当所述累积比特数大于或等于预定值时,计算所述累加比特数的所述过采样数和M倍之间的差; 以及根据所述差异确定过采样信号的频率校准步骤。 本发明还提供了一种用于可编程振荡器的频率校准装置。

    CLOCK FREQUENCY ADJUSTING CIRCUIT AND CLOCK FREQUENCY ADJUSTING METHOD THEREOF
    5.
    发明申请
    CLOCK FREQUENCY ADJUSTING CIRCUIT AND CLOCK FREQUENCY ADJUSTING METHOD THEREOF 审中-公开
    时钟频率调整电路及其频率调整方法

    公开(公告)号:US20120051479A1

    公开(公告)日:2012-03-01

    申请号:US13290169

    申请日:2011-11-07

    IPC分类号: H04L7/00

    CPC分类号: G06F1/12

    摘要: A clock frequency adjusting method includes the steps of: calculating a phase difference between a local signal and SOF signals or EOP signals in an external signal; counting a count value of the phase difference based on a clock frequency of a local oscillator; and adjusting the clock frequency according to the count value. The present invention further provides a clock frequency adjusting circuit.

    摘要翻译: 时钟频率调整方法包括以下步骤:计算外部信号中的本地信号和SOF信号或EOP信号之间的相位差; 基于本地振荡器的时钟频率对相位差的计数值进行计数; 并根据计数值调整时钟频率。 本发明还提供一种时钟频率调整电路。

    METHOD FOR AUTOMATICALLY ADJUSTING CLOCK FREQUENCY AND CLOCK FREQUENCY ADJUSTING CIRCUIT
    6.
    发明申请
    METHOD FOR AUTOMATICALLY ADJUSTING CLOCK FREQUENCY AND CLOCK FREQUENCY ADJUSTING CIRCUIT 审中-公开
    用于自动调整时钟频率和时钟调整电路的方法

    公开(公告)号:US20090284298A1

    公开(公告)日:2009-11-19

    申请号:US12261436

    申请日:2008-10-30

    申请人: Hsiang Sheng LIU

    发明人: Hsiang Sheng LIU

    IPC分类号: G06F1/04

    CPC分类号: G06F1/12

    摘要: A method for automatically adjusting the clock frequency for a USB interface including the steps of: generating a clock signal with an adjustable frequency; receiving a USB differential signal; counting the clock signal based on each frame time of the USB differential signal and obtaining a count value; and adjusting the frequency of the clock signal when the count value exceeds a predetermined count range. The present invention further provides a clock frequency adjusting circuit.

    摘要翻译: 一种用于自动调整USB接口的时钟频率的方法,包括以下步骤:产生具有可调频率的时钟信号; 接收USB差分信号; 根据USB差分信号的每帧时间对时钟信号进行计数,得到计数值; 以及当所述计数值超过预定计数范围时调整所述时钟信号的频率。 本发明还提供一种时钟频率调整电路。