VCO gain tracking for modulation gain setting calibration
    1.
    发明申请
    VCO gain tracking for modulation gain setting calibration 有权
    用于调制增益设置校准的VCO增益跟踪

    公开(公告)号:US20040087285A1

    公开(公告)日:2004-05-06

    申请号:US10287382

    申请日:2002-11-04

    申请人: MOTOROLA, INC.

    摘要: Voltage controlled oscillator (VCO) gain tracking is used for programming modulation gain settings to minimize modulation distortion in a low bandwidth phase locked loop of a mobile station (10). A synthesizer (20) generates a tuning voltage (Vt) for controlling a frequency of a voltage controlled oscillator (VCO) modulated radio frequency signal. A controller (22) outputs a modulation data signal and includes an analog to digital converter (72) for receiving the tuning voltage from the synthesizer (20) on a VCO feedback loop (70), a gain control lookup table (LUT) (76) for storing modulation gain setting calibration data for respective mobile station sub-bands, and a gain setting digital to analog converter (DAC) (78) for outputting a modulation gain control signal to the synthesizer (20). The modulation gain setting calibration data is calibrated using a one-time or continuous calibration methodology during, respectively, a background or normal mode of mobile station operation.

    摘要翻译: 压控振荡器(VCO)增益跟踪用于编程调制增益设置以使移动台(10)的低带宽锁相环中的调制失真最小化。 合成器(20)产生用于控制压控振荡器(VCO)调制的射频信号的频率的调谐电压(Vt)。 控制器(22)输出调制数据信号,并包括用于在VCO反馈回路(70)上接收来自合成器(20)的调谐电压的模数转换器(72),增益控制查找表(LUT)(76) ),用于存储各个移动台子频带的调制增益设定校准数据;以及增益设定数模转换器(DAC)(78),用于向合成器(20)输出调制增益控制信号。 分别在移动台操作的背景或正常模式下,使用一次或连续的校准方法校准调制增益设置校准数据。