公开(公告)号：US4219780A

公开(公告)日：1980-08-26

申请号：US3913

申请日：1979-01-16

申请人： John F. Roulston ,  George Weeden

发明人： John F. Roulston ,  George Weeden

IPC分类号： G01S13/44 ,  H03G3/20

CPC分类号： H03G3/3073 ,  G01S13/4436

摘要： Apparatus for controlling the gains of a pair of gain-matched amplifiers includes means for applying to each amplifier a pilot tone in the form of an exponentially-decaying periodic signal. The apparatus also includes three control loops, one for comparing the output of one amplifier with a reference signal to derive an error signal used to control the amplifier gains when the pilot tone is absent, and a second for controlling the gains when the pilot tone is present. The third loop subtracts the outputs of the two amplifiers and uses the resulting error signal in conjunction with one or other of the signals from the other two loops to control the gain of one of the two amplifiers.

摘要翻译： 用于控制一对增益匹配放大器的增益的装置包括用于以指数衰减的周期性信号的形式向每个放大器施加导频音的装置。 该装置还包括三个控制回路，一个用于将一个放大器的输出与参考信号进行比较，以导出当导频音不存在时用于控制放大器增益的误差信号，另一个用于当导频音为 当下。 第三个环路减去两个放大器的输出，并将所得到的误差信号与来自其他两个环路的一个或另外一个信号相结合，以控制两个放大器之一的增益。

公开(公告)号：US3329902A

公开(公告)日：1967-07-04

申请号：US34091064

申请日：1964-01-29

申请人： HEEM V D NV

发明人： JAN LINDT

IPC分类号： H03G3/20 ,  H04B3/06 ,  H04L27/08

CPC分类号： H03G3/3073 ,  H03G3/3052 ,  H04B3/06 ,  H04L27/08

公开(公告)号：US3005094A

公开(公告)日：1961-10-17

申请号：US76428758

申请日：1958-09-30

申请人： RCA CORP

发明人： TAYLOR CHARLES H

IPC分类号： H03G3/20

CPC分类号： H03G3/3073

公开(公告)号：US20170054424A1

公开(公告)日：2017-02-23

申请号：US14981684

申请日：2015-12-28

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Hiroshi UEMURA

IPC分类号： H03G3/30 ,  H04B10/61 ,  H04B10/564 ,  H03F1/02 ,  H03F3/08

CPC分类号： H04B10/616 ,  H03F1/0205 ,  H03F3/082 ,  H03F2200/129 ,  H03G3/3047 ,  H03G3/3073 ,  H03G3/3084 ,  H04B10/564 ,  H04B10/6931

摘要： According to one embodiment, an amplification circuit includes an amplifier having a gain based on a gain control signal and amplifying an input signal by the gain, and a control portion outputting the gain control signal for increasing the gain after decreasing the gain based on an amplitude of the input signal, when the amplitude of the input signal is detected.

摘要翻译： 根据一个实施例，放大电路包括具有基于增益控制信号的增益并通过增益放大输入信号的放大器，以及控制部分输出增益控制信号，用于在增益减小之后增加增益 当检测到输入信号的幅度时。

公开(公告)号：US09222962B2

公开(公告)日：2015-12-29

申请号：US14618313

申请日：2015-02-10

申请人： Sony Corporation

发明人： Keitarou Kondou ,  Makoto Noda ,  Shinya Tamonoki

IPC分类号： H04L27/08 ,  G01R19/165 ,  H04L27/38 ,  H03F3/19 ,  H03G3/30

CPC分类号： G01R19/16528 ,  G01R19/1659 ,  H03F3/19 ,  H03F2200/451 ,  H03G3/3042 ,  H03G3/3052 ,  H03G3/3073 ,  H04L27/3809

摘要： An automatic gain control apparatus includes: a first counter configured to calculate a first count value that is the number of times when a voltage of an input signal exceeds a first voltage threshold within a predetermined period; a second counter configured to calculate a second count value that is the number of times when the voltage of the input signal drops below a second voltage threshold in the predetermined period; and an over-range detector configured to detect an over-range, based on a comparison result obtained by comparing either one of each of the first count value and the second count value and a calculation result of the first count value and the second count value with a predetermined threshold, and output a detection result.

摘要翻译： 一种自动增益控制装置，包括：第一计数器，被配置为计算第一计数值，所述第一计数值是在预定时段内输入信号的电压超过第一电压阈值的次数; 第二计数器，被配置为计算第二计数值，所述第二计数值是所述输入信号的电压在所述预定周期内下降到第二电压阈值以下的次数; 以及超范围检测器，被配置为基于通过比较第一计数值和第二计数值中的每一个获得的比较结果以及第一计数值和第二计数值的计算结果来检测超范围 并且输出检测结果。

公开(公告)号：US09112577B2

公开(公告)日：2015-08-18

申请号：US13768791

申请日：2013-02-15

申请人： SANYO ELECTRIC CO., LTD.

发明人： Keisuke Higuchi

IPC分类号： H04B1/16 ,  H03G3/30

CPC分类号： H03G3/3073 ,  H04B1/16

摘要： An RF unit receives predetermined signals. The RF unit amplifies the received signals. A gain control unit controls the gain at the RF unit based on the amplified signal and has the RF unit use the controlled gain. The gain control unit performs different controls on the received signals, depending on the case when the received signal is a known signal placed in the beginning of packet signal and the case when the received signal is a signal other than the packet signal.

摘要翻译： RF单元接收预定信号。 RF单元放大接收的信号。 增益控制单元基于放大的信号控制RF单元的增益，并且RF单元使用受控增益。 增益控制单元对接收信号执行不同的控制，这取决于接收到的信号是分组信号开始时已知信号的情况，以及当接收信号是分组信号以外的信号时的情况。

公开(公告)号：US09031175B2

公开(公告)日：2015-05-12

申请号：US14112754

申请日：2012-04-13

申请人： Peter Alriksson ,  Joakim Axmon

发明人： Peter Alriksson ,  Joakim Axmon

IPC分类号： H03G3/20 ,  H03G3/30

CPC分类号： H03G3/20 ,  H03G3/3073 ,  H03G3/3078 ,  H04B17/309 ,  H04B17/318 ,  H04B17/327 ,  H04B17/382

摘要： A method of performing Automatic Gain Control, AGC, in a receiver of a device is provided. The device is served on a serving carrier of a multi-carrier communication network. Measurement gaps are scheduled on the serving carrier for inter-carrier measurements on a non-serving carrier. The method comprises the step of determining a first time interval, in which a predefined signal portion is transmitted on the non-serving carrier; the step of estimating, for the first time interval, received signal power on the non-serving carrier; the step of computing a receiver gain based on the estimate signal power; the step of performing, over a second time interval, an inter-carrier measurement on the non-serving carrier; and the step of applying the receiver gain to the receiver after the second time interval.

摘要翻译： 提供了一种在设备的接收机中执行自动增益控制（AGC）的方法。 该装置在多载波通信网络的服务载体上服务。 测量间隙被调度在服务载波上用于非服务载波上的载波间测量。 该方法包括确定第一时间间隔的步骤，其中在非服务载波上发送预定信号部分; 对于第一时间间隔估计非服务载波上的接收信号功率的步骤; 基于估计信号功率计算接收机增益的步骤; 在第二时间间隔上对非服务载波执行载波间测量的步骤; 以及在第二时间间隔之后将接收机增益应用于接收机的步骤。

公开(公告)号：US20130332980A1

公开(公告)日：2013-12-12

申请号：US14002013

申请日：2012-03-23

申请人： Kenichi Kobayashi ,  Naoki Yoshimochi

发明人： Kenichi Kobayashi ,  Naoki Yoshimochi

IPC分类号： H04N21/426

CPC分类号： H04N21/42607 ,  H03G3/3073 ,  H03G3/3078 ,  H04N5/455 ,  H04N5/52 ,  H04N21/4382

摘要： This technique relates to a receiving device, a receiving method, and a program that can demodulate transmitted signals with high accuracy. A receiving device of this disclosure includes: an amplifying unit that amplifies a received signal; an adjusting unit that adjusts gain of the amplifying unit in accordance with power of the signal; a demodulating unit that demodulates the amplified signal; and a detecting unit that detects an interval from the signal, information having the same content continuously appearing in the interval. The adjusting unit restricts the process of adjusting the gain of the amplifying unit in accordance with a result of the detection of the interval. This disclosure can be applied to receiving devices that receive broadcast signals compliant with DVB-C2 via a CATV network.

摘要翻译： 该技术涉及可以高精度地解调发送信号的接收装置，接收方法和程序。 本公开的接收装置包括：放大单元，其放大接收到的信号; 调整单元，其根据所述信号的功率调整所述放大单元的增益; 解调单元，解调放大的信号; 以及检测单元，其从所述信号检测间隔，具有在所述间隔中连续出现的具有相同内容的信息。 调整单元根据间隔的检测结果限制调整放大单元的增益的处理。 本公开可以应用于经由CATV网络接收符合DVB-C2的广播信号的接收设备。

公开(公告)号：US20130251078A1

公开(公告)日：2013-09-26

申请号：US13990620

申请日：2010-11-30

申请人： Rainer Bachl ,  Steffen Reinhardt

发明人： Rainer Bachl ,  Steffen Reinhardt

IPC分类号： H04L25/06 ,  H03M1/18

CPC分类号： H04L25/061 ,  H03G3/3073 ,  H03M1/18 ,  H04B1/30

摘要： The invention refers to generating a digital signal from an analog signal, wherein the analog signal is amplified according to a gain control value before being converted to a digital value by means of an analog-to-digital converter, wherein a DC offset value of the analog signal is determined, and the gain control value is generated as a function of the dynamic range of the analog-to-digital converter and the DC offset value. The invention further refers to a corresponding circuit and a computer program.

摘要翻译： 本发明涉及从模拟信号产生数字信号，其中模拟信号在通过模数转换器转换成数字值之前根据增益控制值进行放大，其中DC偏移值 确定模拟信号，并且根据模数转换器的动态范围和DC偏移值产生增益控制值。 本发明还涉及相应的电路和计算机程序。

公开(公告)号：US20130122839A1

公开(公告)日：2013-05-16

申请号：US13677188

申请日：2012-11-14

申请人： ACI Communications, Inc.

发明人： Donald Charles Dove ,  Wen-Chieh Tsai

IPC分类号： H04B1/76

CPC分类号： H04B1/76 ,  H03G3/001 ,  H03G3/3073 ,  H03G3/3089

摘要： A compact automatic gain control module for an RF amplifier includes a microchip Tuner for detection of pilot signals in an incoming RF signal. By selectively tuning into pilot signals in response to command from an on-board microprocessor, the module is frequency agile in the selection of pilot signals, selecting specifically advantageous signals for use as a pilot. Use of a microprocessor also enables specific advantages in receiving firmware upgrades to incorporate algorithms for operation parameter monitoring and adjustment of response in accord with monitored parameters. Such monitoring also enables the recording of on-module events that enable storage of a log to enable maintenance and performance enhancement within the module.

摘要翻译： 用于RF放大器的小型自动增益控制模块包括用于检测输入RF信号中的导频信号的微芯片调谐器。 通过根据来自机载微处理器的命令选择性地调谐到导频信号中，该模块在导频信号的选择中频率敏捷，选择用作导频的特别有利的信号。 使用微处理器还可以在接收固件升级方面具有特殊的优势，从而将操作参数监视和响应调整符合监控参数的算法。 这种监控还可以记录模块内事件，从而可以存储日志，从而实现模块内的维护和性能提升。