公开(公告)号：US20140184289A1

公开(公告)日：2014-07-03

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: H03L7/08

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。

公开(公告)号：US20150139369A1

公开(公告)日：2015-05-21

申请号：US14083916

申请日：2013-11-19

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： PAUL H. GAILUS ,  LAWRENCE M. ECKLUND

IPC: H04B1/10

CPC classification number: H04B1/10 ,  H04B1/525

Abstract: A method and apparatus for compensation of noise in a Radio Frequency Identification (RFID) device through modulation of a received signal is described. The method includes determining an amplitude signal proportional to an amplitude of a transmitter signal and associated noise; processing the amplitude signal to derive a correction signal; and modulating a received signal during a receive period with the correction signal to substantially remove the associated noise from the received signal. An RFID device and an RFID transceiver integrated circuit (IC) are also described.

Abstract translation: 描述了通过对接收信号的调制来补偿射频识别（RFID）设备中的噪声的方法和装置。 该方法包括确定与发射机信号的幅度和相关噪声成比例的振幅信号; 处理振幅信号以导出校正信号; 以及在接收周期期间利用所述校正信号调制接收到的信号，以基本上从接收到的信号中除去相关联的噪声。 还描述了RFID设备和RFID收发器集成电路（IC）。