公开(公告)号：US20030207676A1

公开(公告)日：2003-11-06

申请号：US10137754

申请日：2002-05-02

Applicant: MOTOROLA, INC.

Inventor： James David Hughes ,  Lynn R. Freytag ,  John Richard Oakley

IPC: H04B001/06

CPC classification number: H03G3/3052 ,  H03G3/3068 ,  H04B1/109 ,  H04B1/30

Abstract: A power measurement element (106) measures (302) the wide-band received signal power of a receiver (102), and a wide-band AGC system (108) transfers (306) receiver gain control from an on-channel AGC system (110) to the wide-band AGC system, when the wide-band received signal power exceeds a pre-programmed threshold for longer than a pre-programmed delay time. The wide-band AGC system is arranged and programmed to decrease (308) a front-end gain of the receiver through a plurality of gain steps of a pre-programmed size (208) applied at a pre-programmed rate until the received wide-band signal power falls below the pre-programmed threshold.

Abstract translation: 功率测量元件（106）测量（302）接收器（102）的宽带接收信号功率，宽带AGC系统（108）从通道上的AGC系统（106）传送（306）接收机增益控制 当宽带接收信号功率超过预编程阈值长于预编程的延迟时间时，宽带AGC系统。 宽带AGC系统被布置和编程以通过以预编程速率应用的预编程大小（208）的多个增益步长来减小（308）接收机的前端增益，直到接收到的宽带AGC 频带信号功率低于预编程阈值。

公开(公告)号：US20030207675A1

公开(公告)日：2003-11-06

申请号：US10138681

申请日：2002-05-03

Applicant: MOTOROLA, INC.

Inventor： James David Hughes ,  Lynn R. Freytag ,  John Richard Oakley

IPC: H04B001/06

CPC classification number: H03G3/3068 ,  H04B1/109 ,  H04B1/30

Abstract: An automatic gain control system (100) and methods thereof for a receiver for providing a wide range of continuous gain control has been discussed. The AGC includes an input stage (120) for providing an indication of a strength of a received signal; an attenuator stage (107) operable to switch a fixed amount of attenuation for the received signal; a variable attenuator (109) to provide a variable amount of attenuation for said received signal, and a controller (135) responsive to said indication for providing a variable control signal (145) to the variable attenuator; wherein the controller concurrently changes the variable control signal to change in the opposite direction the variable amount of attenuation by approximately the fixed amount of attenuation whenever the attenuator stage is switched, thereby extending the range of continuous gain control beyond the range of the variable attenuator.

Abstract translation: 已经讨论了用于提供广泛的连续增益控制的接收机的自动增益控制系统（100）及其方法。 AGC包括用于提供接收信号强度的指示的输入级（120） 衰减器级（107），用于对所接收的信号切换固定量的衰减; 可变衰减器（109），用于为所述接收的信号提供可变量的衰减;以及控制器（135），响应于所述指示向可变衰减器提供可变控制信号（145）; 其中，所述控制器同时改变所述可变控制信号，以便每当所述衰减器级被切换时，在相反方向上将可变衰减量改变大约固定量的衰减量，从而将连续增益控制的范围扩展到可变衰减器的范围之外。