公开(公告)号：US06906584B1

公开(公告)日：2005-06-14

申请号：US10732106

申请日：2003-12-10

申请人： Mark Moffat ,  Marcus Granger-Jones

发明人： Mark Moffat ,  Marcus Granger-Jones

IPC分类号： H03G1/00 ,  H03G3/20 ,  H03G3/30 ,  H03F3/45

CPC分类号： H03G3/3078 ,  H03F2203/7215 ,  H03F2203/7218 ,  H03G1/0088 ,  H03G3/3052 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/305 ,  H03G2201/502

摘要： The present invention provides a switchable gain amplifier comprising a high-pass filter pole. The switchable gain amplifier comprises first and second input nodes for receiving first and second components of a differential input signal. A first input terminal of a first differential amplifier is coupled to the first input node, and a first input terminal of a second differential amplifier is coupled to the second input node. A first variable resistance is coupled between the first input terminal of the first differential amplifier and a second input terminal of the first differential amplifier. A second variable resistance is coupled between the first input terminal of the second differential amplifier and a second input terminal of the second differential amplifier. A differential capacitor is coupled between the second input terminal of the first differential amplifier and the second input terminal of the second differential amplifier.

摘要翻译： 本发明提供一种包括高通滤波器极的可切换增益放大器。 可切换增益放大器包括用于接收差分输入信号的第一和第二分量的第一和第二输入节点。 第一差分放大器的第一输入端耦合到第一输入节点，第二差分放大器的第一输入端耦合到第二输入节点。 第一可变电阻耦合在第一差分放大器的第一输入端和第一差分放大器的第二输入端之间。 第二可变电阻耦合在第二差分放大器的第一输入端和第二差分放大器的第二输入端之间。 差分电容器耦合在第一差分放大器的第二输入端和第二差分放大器的第二输入端之间。

公开(公告)号：US07593705B2

公开(公告)日：2009-09-22

申请号：US11287787

申请日：2005-11-28

申请人： Tadahiro Sato ,  Akifumi Adachi

发明人： Tadahiro Sato ,  Akifumi Adachi

IPC分类号： H04B1/06 ,  H04Q7/20

CPC分类号： H03G3/3052 ,  H03G3/005 ,  H03G3/3078 ,  H03G3/3089 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/305 ,  H04B1/707 ,  H04B2201/70701 ,  H04B2201/70706

摘要： A radio receiver includes a branching unit, a first gain-control system, a second-gain control system, and a signal processing unit. The branching unit branches a radio signal received by the radio receiver into two signals. The first-gain control system performs a gain control of a pilot signal in one of branched signals, and the second gain control system performs a gain control of a data signal in another of the branched signals. The signal processing unit synchronizes frames in the received radio signal. The signal processing unit outputs a gain signal to each of the first gain-control system and the second gain-control system. The first gain-control system and the second gain-control system perform the gain controls based on the gain signal.

摘要翻译： 无线电接收机包括分支单元，第一增益控制系统，第二增益控制系统和信号处理单元。 分支单元将由无线电接收机接收的无线电信号分成两个信号。 第一增益控制系统以分支信号之一对导频信号进行增益控制，第二增益控制系统对分支信号中的另一个进行数据信号的增益控制。 信号处理单元同步所接收的无线电信号中的帧。 信号处理单元向第一增益控制系统和第二增益控制系统中的每一个输出增益信号。 第一增益控制系统和第二增益控制系统基于增益信号执行增益控制。

公开(公告)号：US07127223B2

公开(公告)日：2006-10-24

申请号：US11189941

申请日：2005-07-26

申请人： Hang Jin ,  John Grabner ,  Jun Huang ,  Daniel Wee Teck Ho

发明人： Hang Jin ,  John Grabner ,  Jun Huang ,  Daniel Wee Teck Ho

IPC分类号： H04B1/06

CPC分类号： H03G3/3052 ,  H03G2201/103 ,  H03G2201/204 ,  H03G2201/305 ,  H03G2201/706

摘要： The present invention discloses a proactive gain control system for a communications receiver. The proactive gain control system includes a variable gain module for outputting an output signal in response to an input signal. A detector detects the output signal and outputs a detection signal representing a signal strength of the output signal. A traffic monitor monitors the output signal and outputs a traffic profile signal indicating that a traffic profile for the input signal will change. A gain computing module outputs a gain adjustment value in response to the detection signal and the traffic profile signal. A gain control module outputs a gain control signal to the variable gain module, which determines a gain between the input and output signals, in response to the gain adjustment value.

摘要翻译： 本发明公开了一种用于通信接收机的主动增益控制系统。 主动增益控制系统包括用于响应于输入信号输出输出信号的可变增益模块。 检测器检测输出信号并输出​​表示输出信号的信号强度的检测信号。 流量监视器监视输出信号并输出​​指示用于输入信号的流量曲线将改变的流量分布信号。 增益计算模块响应于检测信号和流量分布信号输出增益调整值。 增益控制模块响应于增益调整值，向可变增益模块输出增益控制信号，该可变增益模块确定输入和输出信号之间的增益。

公开(公告)号：US20050221779A1

公开(公告)日：2005-10-06

申请号：US11093416

申请日：2005-03-30

申请人： Taiwa Okanobu

发明人： Taiwa Okanobu

IPC分类号： H03G3/20 ,  H03G1/00 ,  H03G3/30 ,  H03G7/00 ,  H04B1/06 ,  H04B1/10 ,  H04B1/16 ,  H04B7/00 ,  H04B17/40 ,  H04B17/02

CPC分类号： H03G3/3068 ,  H03G1/0023 ,  H03G1/0088 ,  H03G7/001 ,  H03G2201/103 ,  H03G2201/204 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/506

摘要： An automatic gain control (AGC) circuit includes a number of attenuation circuits connected in series relative to a reception signal, a of variable gain amplifiers to which the reception signal and each output signal from the attenuation circuits are fed, respectively, a signal deriving circuit connected to output terminals of the variable gain amplifiers for deriving a level-controlled output signal, and a control current generating circuit for generating a control current having a predetermined characteristic out of first and second AGC voltages, wherein the control current outputted from the control current generating circuit is supplied to the variable gain amplifiers as a control signal for switching an operation thereof and for controlling a gain thereof, and a feedback control current corresponding to the control current is performed by the control current generating circuit.

摘要翻译： 自动增益控制（AGC）电路包括相对于接收信号串联连接的多个衰减电路，分别馈送有来自衰减电路的接收信号和每个输出信号的可变增益放大器的信号导出电路 连接到可变增益放大器的输出端，用于导出电平控制的输出信号;以及控制电流产生电路，用于产生具有从第一和第二AGC电压起的预定特性的控制电流，其中从控制电流输出的控制电流 发电电路被提供给可变增益放大器作为用于切换其操作并用于控制其增益的控制信号，并且由控制电流产生电路执行与控制电流相对应的反馈控制电流。

公开(公告)号：US20040259511A1

公开(公告)日：2004-12-23

申请号：US10864193

申请日：2004-06-09

发明人： Der-Zheng Liu ,  Song-Nien Tang ,  Tai-Cheng Liu ,  Kuang-Yu Yen

IPC分类号： H03M001/10

CPC分类号： H03G3/3052 ,  H03G2201/206 ,  H03G2201/302 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/502 ,  H03G2201/508 ,  H03M1/185 ,  H04B7/0814

摘要： The invention provides an automatic gain control and antenna selection method used in a receiver of a radio communication system. The received signal power is estimated by digital signal processing after analog-to-digital conversion in the system, in order to adjust the gain of the front end analog signal until the magnitude of the analog signal is adjusted to an optimum range of the digital signal processing. In addition, the ADC is utilized to estimate the signal power as the basis of the antenna selection.

摘要翻译： 本发明提供一种在无线电通信系统的接收机中使用的自动增益控制和天线选择方法。 接收到的信号功率通过系统中模数转换后的数字信号处理来估计，以便调整前端模拟信号的增益，直到模拟信号的幅度被调整到数字信号的最佳范围 处理。 此外，ADC用于估计信号功率作为天线选择的基础。