公开(公告)号：US08873682B2

公开(公告)日：2014-10-28

申请号：US13631421

申请日：2012-09-28

Applicant: Broadcom Corporation

Inventor： Rami Mehio ,  Masoud Kahrizi ,  Cobus de Beer ,  Michael Buyanin

IPC: H04L27/06

CPC classification number: H03L7/18 ,  H03J7/045 ,  H03J7/065 ,  H03J2200/10

Abstract: A technique to provide hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to adjust for overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. The second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remain after performing compensation in the DCXO.

公开(公告)号：US20140091842A1

公开(公告)日：2014-04-03

申请号：US13631421

申请日：2012-09-28

Applicant: BROADCOM CORPORATION

Inventor： Rami Mehio ,  Masoud Kahrizi ,  Cobus de Beer ,  Michael Buyanin

IPC: H03L7/08

CPC classification number: H03L7/18 ,  H03J7/045 ,  H03J7/065 ,  H03J2200/10

Abstract: A technique to provide hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to adjust for overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. The second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remain after performing compensation in the DCXO.

Abstract translation: 提供混合补偿以校正数字控制晶体振荡器（DCXO）的参考频率输出中的漂移的技术。 向DCXO提供第一补偿，以调整由控制参考频率输出漂移的电容器阵列中的开关电容引起的参考频率的重叠或不连续性。 在从DCXO接收参考频率信号的锁相环（PLL）获得第二补偿。 第二个补偿调整PLL，以调整在DCXO中执行补偿后剩余的参考频率的变化。