公开(公告)号：US20180041179A1

公开(公告)日：2018-02-08

申请号：US15627214

申请日：2017-06-19

申请人： ATMEL Corporation

发明人： Werner Blatz ,  Michael Sagebiel ,  Thomas Janz ,  Martin Fischer ,  Daniel Moser ,  Jan Knopf

IPC分类号： H03G3/30

CPC分类号： H03G3/3036 ,  H03G3/3052 ,  H03G3/3073 ,  H03G3/3084 ,  H04B17/21 ,  H04B17/23 ,  H04B17/318

摘要： In some implementations, an automatic gain control (AGC) circuit comprises: a pre-divider circuit operable to pre-divide an input signal according to a pre-divider circuit setting and output a pre-divided signal; a pre-amplifier operable to pre-amplify the pre-divided signal and output a pre-amplified signal; a post-divider circuit operable to post-divide the pre-amplified signal according to a post-divider circuit setting; an analog-to-digital converter (ADC) operable to generate a digital data stream from the post-divided signal; logic operable to sample the digital data stream; determine a pre-divider circuit setting and a post-divider circuit setting based on the sampled data stream; set the pre-divider circuit and the post-divider circuit based on the determined settings; and generate a received signal strength value based on the pre-divider circuit setting and the post-divider circuit setting.

公开(公告)号：US09319018B2

公开(公告)日：2016-04-19

申请号：US13512302

申请日：2009-12-04

申请人： Miguel Lopez ,  Kenneth Sandberg

发明人： Miguel Lopez ,  Kenneth Sandberg

IPC分类号： H03D1/04 ,  H03G3/30 ,  H03M13/39 ,  H03M13/41

CPC分类号： H03G3/3068 ,  H03G3/3073 ,  H03G3/3078 ,  H03M13/3905 ,  H03M13/41 ,  H03M13/4138 ,  H03M13/4146

摘要： Non-linear distortions, called glitches, occur in radio receivers when automatic gain control (AGC) is employed for regulating the dynamic range of the received signal. It is proposed to determine (S1) the occurrence of a glitch caused by operation of the AGC mechanism, and estimate (S2) a representation of how energy of a signal transient associated with the glitch is transferred by digital filter(s) in the receiver. The radio signal is then detected (S3) at least partly based on the estimated representation. In this way, the adverse effects of the glitch can be mitigated and detection of the desired signal can be significantly improved. This also means that the link performance will be significantly improved.

摘要翻译： 当使用自动增益控制（AGC）来调节接收信号的动态范围时，在无线电接收机中发生称为毛刺的非线性失真。 提出确定（S1）由AGC机构的操作引起的毛刺的发生，并且估计（S2）表示与毛刺相关联的信号瞬态的能量如何通过接收机中的数字滤波器传送 。 至少部分地基于估计的表示来检测（S3）无线电信号。 以这种方式，可以减轻毛刺的不利影响，并且可以显着改善所需信号的检测。 这也意味着链路性能将显着提高。

公开(公告)号：US09124467B2

公开(公告)日：2015-09-01

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： H04L27/08 ,  H04L25/06 ,  H03G3/30 ,  H04B1/30 ,  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：US20150222240A1

公开(公告)日：2015-08-06

申请号：US14475420

申请日：2014-09-02

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Katsuya NONIN ,  Kentaro TANIGUCHI

IPC分类号： H03G3/32 ,  H04B1/12

CPC分类号： H04B1/123 ,  H03G3/3052 ,  H03G3/3073 ,  H03G3/3078

摘要： A reception device includes a low noise amplifier that amplifies a radio signal by a first gain, a variable gain amplifier that amplifies an output of the low noise amplifier by a second gain, an analog-to-digital converter that converts an output of the variable gain amplifier into a digital signal, a gain controller, and a saturation detection unit. The gain controller, when an amplitude of the radio signal exceeds a predetermined value, controls the first and second gains according to the amplitude of the radio signal, and completes the control within a predetermined period. The saturation detection unit detects saturation of the analog-to-digital converter based on the output of the low noise amplifier or the digital signal. The gain controller, after controlling the first and second gains a first time and the saturation is detected by the saturation detection unit, controls the first and second gains a second time.

摘要翻译： 接收装置包括：通过第一增益放大无线电信号的低噪声放大器;将第二增益放大低噪声放大器的输出的可变增益放大器;转换变量的输出的模数转换器; 增益放大器转换为数字信号，增益控制器和饱和度检测单元。 当无线电信号的幅度超过预定值时，增益控制器根据无线电信号的幅度来控制第一和第二增益，并在预定的时间段内完成控制。 饱和检测单元基于低噪声放大器或数字信号的输出来检测模数转换器的饱和度。 增益控制器在第一次控制第一和第二增益并且由饱和度检测单元检测到饱和之后，第二次控制第一和第二增益。

公开(公告)号：US09059807B2

公开(公告)日：2015-06-16

申请号：US13699855

申请日：2011-05-24

申请人： Peter Ossieur ,  Paul Townsend

发明人： Peter Ossieur ,  Paul Townsend

IPC分类号： H04B10/06 ,  H04B10/69 ,  H04B10/67 ,  H03G3/30

CPC分类号： H04B10/6931 ,  H03G3/3073 ,  H03G3/3084 ,  H04B10/672

摘要： The invention provides a linear burst mode receiver comprising a first amplifier connected to a photodiode adapted to detect an optical input burst signal, a second amplifier connected to said photodiode; and means for deriving the peak input current of the detected burst signal using said second amplifier. The invention further provides means for using the derived peak input current to adjust the gain of the first amplifier during the preamble of each burst, such that the output voltage swing of the first amplifier equals a given reference, independent of the strength of the optical input burst signal. The usage of the fast feed-forward automatic gain control mechanism solves the problems with gain switching and non-linearity prevalent in today's burst-mode receivers.

摘要翻译： 本发明提供一种线性突发模式接收机，包括连接到光电二极管的第一放大器，适用于检测光输入脉冲串信号，连接到所述光电二极管的第二放大器; 以及用于使用所述第二放大器导出检测到的突发信号的峰值输入电流的装置。 本发明还提供了用于在每个脉冲串的前导码期间使用导出的峰值输入电流来调整第一放大器的增益的装置，使得第一放大器的输出电压摆幅等于给定的参考值，而与光输入的强度无关 突发信号。 快速前馈自动增益控制机制的使用解决了当今突发模式接收机中普遍存在的增益切换和非线性问题。

公开(公告)号：US09042250B2

公开(公告)日：2015-05-26

申请号：US13579975

申请日：2011-07-12

申请人： Qingzhu Hou

发明人： Qingzhu Hou

IPC分类号： H04W4/00 ,  H03G3/30

CPC分类号： H04W4/003 ,  H03G3/3073 ,  H03G3/3078 ,  H04W4/60

摘要： A gain obtaining method for a non traffic card of a multi-card multi-standby communication device, comprising: acquiring spare time information of a traffic card (S101); monitoring a cell broadcast channel of a non traffic card in a spare time of the traffic card, to measure a current signal intensity of a cell (S102); and calculating a signal gain required by the non traffic card for correctly receiving data according to the signal intensity (S103). Based on the gain tracking method for a non-traffic card, a multi-card multi-standby communication device is further provided. Through the technical solutions, the traffic card can track the gain required by the non traffic card for correctly receiving data during the implementation of a service.

摘要翻译： 一种用于多卡多待机通信设备的非业务卡的增益获取方法，包括：获取业务卡的业余时间信息（S101）; 在业务卡的业余时间中监视非业务卡的小区广播信道，以测量小区的当前信号强度（S102）; 以及根据信号强度计算非业务卡所需的信号增益以正确地接收数据（S103）。 基于非交通卡的增益跟踪方法，还提供了多卡多待机通信装置。 通过技术方案，交通卡可以跟踪非业务卡所需的增益，以便在实施服务期间正确接收数据。

公开(公告)号：US20030099288A1

公开(公告)日：2003-05-29

申请号：US09996329

申请日：2001-11-28

发明人： Vaughn Mower ,  Robert Wright

IPC分类号： H04L027/08 ,  H03H007/40 ,  H03H007/30 ,  H03K005/159

CPC分类号： H03G3/3073

摘要： An inexpensive method and apparatus for detecting and characterizing interference in wideband communication channels obviates the need for expensive prior art Digital Signal Processors (DSPs) and complex custom software, by novelly including with the spectrum analyzer, a burst clamp and an automatic gain control (AGC) circuit upstream of the spectrum analyzer, and a general purpose computer (such as a microcomputer). The burst clamp and AGC circuit (with a time constant nullAGC set much larger than the time constant of the burst interference signal time constant nullJ) operate to suppress the monitored signal at the input of the spectrum analyzer during the burst intervals to thereby indicate the presence of interference. The burst clamp and AGC circuit also provide for rapid recovery of the monitored signal after the burst. Connected to the output of the spectrum analyzer, the computer determines the interference type (burst or continuous wave (CW)).

摘要翻译： 用于检测和表征宽带通信信道中的干扰的廉价方法和装置通过新颖地包括频谱分析仪，突发钳位和自动增益控制（AGC）来消除昂贵的现有技术的数字信号处理器（DSP）和复杂定制软件的需要 ）电路，以及通用计算机（例如微计算机）。 脉冲串钳位和AGC电路（具有比突发干扰信号时间常数τJ的时间常数大得多的时间常数τT C C）在突发间隔期间操作以抑制在频谱分析仪的输入处的监测信号，从而指示存在 的干扰。 突发钳位和AGC电路还可以在突发后快速恢复被监视的信号。 连接到频谱分析仪的输出，计算机确定干扰类型（脉冲串或连续波（CW））。

公开(公告)号：US4610006A

公开(公告)日：1986-09-02

申请号：US560294

申请日：1983-12-12

申请人： Clyde O. MacDonald

发明人： Clyde O. MacDonald

IPC分类号： G01V1/24 ,  H03G3/20 ,  H03G3/30 ,  G01V13/00

CPC分类号： H03G3/3073 ,  G01V1/245 ,  H03G3/20

摘要： A circuit is disclosed for use in an acoustic logging tool incorporating a transmitter sending an acoustic pulse which is received by acoustic receivers. In the preferred and illustrated embodiment hereof, an automatic gain control (AGC) circuit controls the receiver amplification to enable the output range to be limited for input to a digital graphic recorder, typically having a limited number of output signal levels, coordinating with data processing equipment. The AGC times the peak operation to thereby limit the dynamic range.

摘要翻译： 公开了一种用于声学测井工具的电路，其包括发射由声学接收器接收的声学脉冲的发射器。 在本文的优选和示出的实施例中，自动增益控制（AGC）电路控制接收机放大，使得输出范围被限制为输入到数字图形记录器，通常具有有限数量的输出信号电平，与数据处理协调 设备。 AGC乘以峰值操作，从而限制动态范围。

公开(公告)号：US4536885A

公开(公告)日：1985-08-20

申请号：US565303

申请日：1983-12-27

申请人： Bernard D. Loughlin

发明人： Bernard D. Loughlin

IPC分类号： H03G3/20 ,  H04H1/00 ,  H04H20/49 ,  H04H5/00

CPC分类号： H04H20/49 ,  H03G3/3073

摘要： In a receiver for composite amplitude and angle modulated signals and having a non-flat automatic gain control characteristic, there is provided apparatus for providing distortion correction to the quadrature component produced by the angular modulation in accordance with the amplitude modulation component. In accordance with the invention, the output of an amplitude demodulator is modified to remove the carrier signal level dependent magnitude multiplier and develop a modification signal which is used to inversely amplitude modulate the quadrature signal component to provide distortion correction over a range of carrier signal levels. Such inverse modulation can be provided before or after quadrature demodulation of the received signal.

摘要翻译： 在用于复合幅度和角度调制信号并且具有非平坦自动增益控制特性的接收机中，提供了用于根据调幅分量为由角度调制产生的正交分量提供失真校正的装置。 根据本发明，修改幅度解调器的输出以去除载波信号电平相关幅度乘法器并产生修正信号，该修改信号用于对正交信号分量进行逆幅度调制，以在载波信号电平范围内提供失真校正 。 可以在接收信号的正交解调之前或之后提供这种逆调制。

公开(公告)号：US4489281A

公开(公告)日：1984-12-18

申请号：US480613

申请日：1983-03-30

申请人： Mikio Kiyono

发明人： Mikio Kiyono

IPC分类号： H03G3/02 ,  H03G3/20

CPC分类号： H03G3/3073 ,  H03G3/3052

摘要： In an automatic gain control amplifier circuit for an intermittent sequence of digital input signals, a signal detector detects presence and absence of the digital input signal in the sequence to produce a presence signal which takes a presence and an absence level when the digital input signal is present and absent, respectively. The presence signal takes the absence level even upon undesired occurrence of an interruption in one of the digital input signals. A level comparator compares an amplified level of a digital output signal of the amplifier circuit with a reference level, which is preferably equal to an optimum level common to the digital output signals, to produce a comparison result signal which takes a first and a second level when the amplified level is higher and lower than the reference level, respectively. An up-down counter is preset to a predetermined count upon switch on of a power source for the amplifier circuit and is enabled by the presence level to count up and down clocks of the digital input signal from the predetermined count when the comparison result signal takes one and the other of the first and the second levels, respectively. A gain control signal is produced in consideration of the count in the up-down counter.

摘要翻译： 在用于间歇数字输入信号序列的自动增益控制放大器电路中，信号检测器检测序列中数字输入信号的存在和不存在，以产生存在信号，当数字输入信号为 分别存在和不存在。 即使在数字输入信号中的一个不期望地发生中断的情况下，存在信号也取消缺电。 电平比较器将放大器电路的数字输出信号的放大电平与参考电平进行比较，该参考电平优选地等于数字输出信号公共的最佳电平，以产生采用第一和第二电平的比较结果信号 当放大电平分别高于和低于参考电平时。 在放大器电路的电源接通时，将预置的计数器预设为预定的计数，并且当比较结果信号采用时，通过存在电平来计数来自预定计数的数字输入信号的上升和下降时钟 分别是第一和第二级别之一。 考虑到递增计数器的计数产生增益控制信号。