Digital phase-locked loop apparatus using frequency shift keying and method of controlling the same
    1.
    发明授权
    Digital phase-locked loop apparatus using frequency shift keying and method of controlling the same 失效
    使用频移键控的数字锁相环装置及其控制方法

    公开(公告)号:US08552775B2

    公开(公告)日:2013-10-08

    申请号:US13589629

    申请日:2012-08-20

    IPC分类号: H03L7/06

    CPC分类号: H03L7/0992

    摘要: A digital phase-locked loop apparatus using FSK includes a PFD detecting phase differences between a reference clock and a frequency-divided signal, and a first adder for generating first digital control codes by adding first digital codes, second digital codes, and channel frequency codes including channel information to each other, the first digital codes being converted from time differences between first and second pulses. The apparatus further includes a digital filter correcting errors of the first digital control codes to generate second digital control codes, a DCO for varying an oscillating frequency in accordance with a digital tuning word based on the second digital control codes, and a dual modulus division unit dividing the oscillating frequency into a frequency-divided signal.

    摘要翻译: 使用FSK的数字锁相环装置包括PFD检测参考时钟和分频信号之间的相位差,以及第一加法器,用于通过将第一数字码,第二数字码和频道频率码相加来产生第一数字控制码 包括彼此的信道信息,所述第一数字码从第一和第二脉冲之间的时间差转换。 该装置还包括校正第一数字控制码的误差以产生第二数字控制码的数字滤波器,用于根据第二数字控制码根据数字调谐字改变振荡频率的DCO,以及双模分割单元 将振荡频率分频成分频信号。