公开(公告)号：US09035682B2

公开(公告)日：2015-05-19

申请号：US13730932

申请日：2012-12-29

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Paul H. Gailus ,  Joseph A. Charaska ,  Stephen B. Einbinder ,  Robert E. Stengel

IPC: H03L7/06 ,  H03L7/197 ,  H03C3/09 ,  H03L7/23

CPC classification number: H03L7/1974 ,  H03C3/0925 ,  H03C3/0933 ,  H03L7/235

Abstract: A method and apparatus for single port modulation of a phase locked loop frequency modulator includes a phase locked loop with a voltage controlled oscillator (VCO) and a integer loop for multiplying up the output of the VCO which is divided by a fractional-N modulator and divider in the feedback control. The integer loop enables the use of a high frequency reference oscillator that allows a closed loop response of the phase locked loop having a bandwidth that is wider than the modulation bandwidth.

Abstract translation: 用于锁相环频率调制器的单端口调制的方法和装置包括具有压控振荡器（VCO）的锁相环和用于将由分数N调制器分频的VCO的输出相乘的整数循环和 分频器在反馈控制中。 整数循环使得能够使用高频参考振荡器，其允许具有比调制带宽宽的带宽的锁相环的闭环响应。