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    LOOP GAIN CALIBRATION APPARATUS FOR CONTROLLING LOOP GAIN OF TIMING RECOVERY LOOP AND RELATED LOOP GAIN CALIBRATION METHOD
    6.
    发明申请
    LOOP GAIN CALIBRATION APPARATUS FOR CONTROLLING LOOP GAIN OF TIMING RECOVERY LOOP AND RELATED LOOP GAIN CALIBRATION METHOD 审中-公开
    用于控制时序恢复环路环路增益的环路增益校准装置和相关环路增益校准方法

    公开(公告)号：US20150341158A1

    公开(公告)日：2015-11-26

    申请号：US14706989

    申请日：2015-05-08

    Applicant: Mediatek Inc.

    Inventor： Kuo-Ming Wu ,  Ching-Shyang Maa ,  Shu-Hsien Wang ,  Chung-Jung Huang ,  Guo-Hau Gau ,  Mau-Lin Wu

    IPC: H04L7/00

    CPC classification number: H04L7/002 ,  H03L7/0807 ,  H03L7/081 ,  H03L7/091 ,  H04L7/0004 ,  H04L7/0025 ,  H04L7/0062

    Abstract: A loop gain calibration apparatus has an exciting signal generator, an exciting signal extracting circuit, and a loop gain control circuit. The exciting signal generator generates a first exciting signal and injects the first exciting signal into a timing recovery loop while the timing recovery loop is operating in response to a reception signal received under a normal reception mode. The exciting signal extracting circuit extracts a second exciting signal from the timing recovery loop after the first exciting signal is injected into the timing recovery loop. The loop gain control circuit receives the first exciting signal from the exciting signal generator, receives the second exciting signal from the exciting signal extracting circuit, and controls a loop gain of the timing recovery loop according to the first exciting signal and the second exciting signal.

    Abstract translation: 环路增益校准装置具有励磁信号发生器，励磁信号提取电路和环路增益控制电路。 激励信号发生器产生第一激励信号，并且在定时恢复环路响应于在正常接收模式下接收的接收信号而工作时，将第一激励信号注入定时恢复环路。 励磁信号提取电路在将第一激励信号注入定时恢复回路之后，从定时恢复环路提取第二激励信号。 环路增益控制电路从激励信号发生器接收第一激励信号，从激励信号提取电路接收第二激励信号，并根据第一激励信号和第二激励信号控制定时恢复环路的环路增益。

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