公开(公告)号：US09455723B2

公开(公告)日：2016-09-27

申请号：US14743360

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Mohammad Bagher Vahid Far ,  Ara Bicakci ,  Alireza Khalili ,  Ashkan Borna ,  Thinh Cat Nguyen

IPC: H03L7/06 ,  H03L7/08 ,  H03L7/093 ,  H02M3/07

CPC classification number: H03L7/0802 ,  H02M3/07 ,  H03L7/0891 ,  H03L7/093

Abstract: Certain aspects of the present disclosure provide methods and apparatus for compensating, or at least adjusting, for capacitor leakage. One example method generally includes determining a leakage voltage corresponding to a leakage current of a capacitor in a filter for a phase-locked loop (PLL), wherein the determining comprises closing a set of switches for discontinuous sampling of the leakage voltage; based on the sampled leakage voltage, generating a sourced current approximately equal to the leakage current; and injecting the sourced current into the capacitor.

Abstract translation: 本公开的某些方面提供了用于补偿或至少调整电容器泄漏的方法和装置。 一个示例性方法通常包括确定对应于用于锁相环（PLL）的滤波器中的电容器的漏电流的泄漏电压，其中所述确定包括闭合一组开关以不连续地采样泄漏电压; 基于采样的泄漏电压，产生大致等于泄漏电流的源电流; 并将源电流注入电容器。