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1. 发明申请

WO2006100617A1 OPERATING A PHASE LOCKED LOOP 审中-公开
标题翻译：操作相位锁定环
公开(公告)号：WO2006100617A1
公开(公告)日：2006-09-28
申请号：PCT/IB2006/050737
申请日：2006-03-09
申请人： NOKIA CORPORATION , SALONEN, Vesa , VILHONEN, Sami
发明人： SALONEN, Vesa , VILHONEN, Sami
IPC分类号： H03L7/113 , H03L7/187
CPC分类号： H03L7/189 , H03L7/113
摘要： A PLL comprises a VCO and a loop filter, wherein the VCO generates an AC output signal having a frequency which depends on an applied control voltage, and wherein the loop filter provides a control voltage to the VCO. The control voltage reflects determined phase differences between a potentially frequency divided output signal of the VCO and a reference signal. When operating the PLL, frequency deviations between a potentially frequency divided output signal of the VCO and a reference signal are detected and in addition, a resolution employed for detecting the frequency deviations is lower than a resolution employed for determining the phase differences. In case a frequency deviation is detected, a direct-current voltage shift is added to the control voltage provided by the loop filter.
摘要翻译： PLL包括VCO和环路滤波器，其中VCO产生具有取决于施加的控制电压的频率的AC输出信号，并且其中环路滤波器向VCO提供控制电压。控制电压反映了VCO的潜在分频输出信号与参考信号之间确定的相位差。当操作PLL时，检测VCO的潜在分频输出信号与参考信号之间的频率偏差，此外，用于检测频率偏差的分辨率低于用于确定相位差的分辨率。在检测到频率偏差的情况下，将直流电压偏移加到由环路滤波器提供的控制电压。

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