发明名称 |
OPERATING A PHASE LOCKED LOOP |
摘要 |
<p>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.</p> |
申请公布号 |
WO2006100617(A1) |
申请公布日期 |
2006.09.28 |
申请号 |
WO2006IB50737 |
申请日期 |
2006.03.09 |
申请人 |
NOKIA CORPORATION;SALONEN, VESA;VILHONEN, SAMI |
发明人 |
SALONEN, VESA;VILHONEN, SAMI |
分类号 |
H03L7/113;H03L7/187 |
主分类号 |
H03L7/113 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|