公开(公告)号：US08766683B2

公开(公告)日：2014-07-01

申请号：US13946411

申请日：2013-07-19

Applicant: ST-Ericsson SA

Inventor： Marc Houdebine ,  Julien Kieffer ,  Sebastien Rieubon

IPC: H03L7/18 ,  H03L7/093

CPC classification number: H03L7/0891 ,  H03L7/0895 ,  H03L7/093

Abstract: According to embodiments, dual path loop filter circuits are described which have, for example, a single charge pump. The current flow in the DPLF circuit is architected to source, during an injection time period, a first current to the loop filter, sink, also during the injection time period, a second current from the loop filter, wherein the first current has a magnitude of α*I and the second current has a magnitude of β*I, and sink, during a linearization time period, a third current from the loop filter, wherein the third current has a magnitude of (α−β)*I.

Abstract translation: 根据实施例，描述了具有例如单个电荷泵的双路径环路滤波器电路。 在DPLF电路中的电流流动被设计成在注入时间段期间将源自环路滤波器的第一电流源自环路滤波器，也可以在注入时间段期间从环路滤波器引出第二电流，其中第一电流具有幅度 并且所述第二电流具有大于所述环路滤波器的第三电流，并且在线性化时间段期间从所述环路滤波器吸收第三电流，其中所述第三电流的幅度为（α＆bgr）* I 。