Transmitter reducing frequency pulling
    1.
    发明公开
    Transmitter reducing frequency pulling 有权
    Mitziehen der Frequenz verringender发件人

    公开(公告)号:EP2675070A1

    公开(公告)日:2013-12-18

    申请号:EP13169216.2

    申请日:2013-05-24

    申请人: NXP B.V.

    IPC分类号: H04B1/04

    摘要: The invention provides a transmitter comprising two (or more) phase locked loops controlling respective oscillators, and implementing different phase modulation. Multiple phases are derived from the respective oscillators, and an edge rotator forms an output signal from a combination of the phases. The oscillators can operate at different frequencies, neither of which is an integer multiple of the other, whereas the output signals of the multiplexers of the first and second phase locked loops are closer in frequency and can be the same. This reduces the problem of pulling, with a circuit that can be implemented with low power and area and with the versatility of being digitally intensive.

    摘要翻译: 本发明提供一种包括两个(或更多个)锁相环的发射器,其控制相应的振荡器,并实现不同的相位调制。 从相应的振荡器导出多个相位,并且边缘旋转器从相位的组合形成输出信号。 振荡器可以在不同频率下操作,这两个频率都不是另一个的整数倍,而第一和第二锁相环的多路复用器的输出信号在频率上更接近并且可以相同。 这减少了拉动的问题,具有可以以低功率和面积实现的电路,并且具有数字密集的多功能性。