公开(公告)号：US20140376748A1

公开(公告)日：2014-12-25

申请号：US14481174

申请日：2014-09-09

Applicant: Yamaha Corporation

Inventor： Masaaki OKABAYASHI ,  Hideki Hagiwara ,  Masaru Aiso

IPC: H03G3/20 ,  H03M1/18

CPC classification number: H03G3/20 ,  H03G3/04 ,  H03G3/3005 ,  H03G2201/103 ,  H03M1/18 ,  H04H60/04 ,  H04R3/00 ,  H04R29/007 ,  H04R29/008 ,  H04R2420/01 ,  H04R2430/01

Abstract: While level of the inputted analog signal is adjusted according to a set analog gain value and then analog-digital converted and outputted, when an automatic compensation is on and a difference of the analog gain value and a target value is compensated by level adjustment in a digital amplifier, the analog gain value is displayed by a gain knob, and in response to an operation to turn on the automatic compensation, a present value of the analog gain value at that time is displayed as a target gain value by a mark near the analog gain value, and in response to an operation to turn off the automatic compensation, display of the target gain value is erased.

Abstract translation: 当输入的模拟信号的电平根据设定的模拟增益值进行调整，然后进行模拟数字转换和输出时，当自动补偿打开时，模拟增益值和目标值的差值通过电平调整进行补偿 数字放大器，通过增益旋钮显示模拟增益值，并且响应于打开自动补偿的操作，此时的模拟增益值的当前值作为目标增益值通过附近的标记显示 模拟增益值，并且响应于关闭自动补偿的操作，目标增益值的显示被擦除。

公开(公告)号：US08301097B2

公开(公告)日：2012-10-30

申请号：US12115263

申请日：2008-05-05

Applicant: Hooman Darabi ,  Henrik T. Jensen ,  Brima Ibrahim

Inventor： Hooman Darabi ,  Henrik T. Jensen ,  Brima Ibrahim

IPC: H04B1/06 ,  H04B7/00

CPC classification number: H03G1/007 ,  H03G3/3063 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/307

Abstract: A method for processing a plurality of signals may include amplifying an input signal and generating a wideband signal from the amplified input signal. The method may further include bandpass filtering the generated wideband signal to generate a narrowband signal, and adjusting amplification of the input signal based on a narrowband received signal strength indication of the generated narrowband signal, and/or a wideband received signal strength indication of the generated wideband signal. The amplified input signal may be downconverted to generate the wideband signal. The amplified input signal may be downconverted to an intermediate frequency (IF) and/or to a baseband signal to generate the wideband signal. At least one blocker signal may be bandpass filtered from the amplified input signal.

Abstract translation: 用于处理多个信号的方法可以包括放大输入信号并从放大的输入信号产生宽带信号。 该方法还可以包括对生成的宽带信号进行带通滤波以产生窄带信号，以及基于所生成的窄带信号的窄带接收信号强度指示和/或所生成的宽带信号强度指示来调整输入信号的放大 宽带信号。 放大的输入信号可以被下变频以产生宽带信号。 放大的输入信号可以下变频到中频（IF）和/或基带信号以产生宽带信号。 至少一个阻塞信号可以从放大的输入信号进行带通滤波。

公开(公告)号：US07852151B2

公开(公告)日：2010-12-14

申请号：US12130453

申请日：2008-05-30

Applicant: Thomas J. Bardsley ,  Matthew R. Cordrey-Gale ,  James S. Mason ,  Philip J. Murfet ,  Gareth J. Nickolls

Inventor： Thomas J. Bardsley ,  Matthew R. Cordrey-Gale ,  James S. Mason ,  Philip J. Murfet ,  Gareth J. Nickolls

IPC: H03F1/14

CPC classification number: H03F3/45475 ,  H03F1/0277 ,  H03F3/211 ,  H03F3/45179 ,  H03F3/72 ,  H03F2203/45138 ,  H03G1/0029 ,  H03G1/0088 ,  H03G3/001 ,  H03G2201/103 ,  H03G2201/504

Abstract: A method of varying the gain of an amplifier and an amplifier array are provided. The amplifier array includes two or more amplifier stages (201, 202) connected in parallel with each amplifier stage having a gain control means. Input signal means (203, 204) are provided for each amplifier stage with the input signals of the amplifier stages being of different amplitude. Means for enabling and disabling an amplifier stage (216) are provided and means for summing the outputs of the enabled amplifier stages obtain an output signal (212). The gain of the amplifier array has a range from a low gain setting with a first amplifier stage (202) enabled, through increasing gain settings as the gain of the first amplifier stage is increased from a minimum to a maximum gain, a second amplifier stage (201) can then be enabled in addition to the first amplifier stage and the gain of the second amplifier stage increased from a minimum to a maximum gain, further amplifier stages are enabled as available up to a maximum gain setting for the amplifier array. Each amplifier stage that is enabled has a decreasingly attenuated input signal and a final amplifier stage to be enabled has a full input signal (203).

Abstract translation: 提供了改变放大器和放大器阵列的增益的方法。 放大器阵列包括与具有增益控制装置的每个放大器级并联连接的两个或更多个放大器级（201,202）。 为每个放大器级提供输入信号装置（203,204），放大器级的输入信号具有不同的幅度。 提供了用于启用和禁用放大器级（216）的装置，用于对使能的放大器级的输出进行求和以获得输出信号（212）的装置。 放大器阵列的增益具有从具有第一放大级（202）使能的低增益设置的范围，通过当第一放大器级的增益从最小增益增加到最大增益时增加增益设置，第二放大器级 （201）除了第一放大器级以及第二放大器级的增益从最小增益增加到最大增益之外，还可以使能另外的放大器级，直至达到放大器阵列的最大增益设置。 启用的每个放大器级具有递减衰减的输入信号，并且待使能的最终放大器级具有完整输入信号（203）。

公开(公告)号：US07593705B2

公开(公告)日：2009-09-22

申请号：US11287787

申请日：2005-11-28

Applicant: Tadahiro Sato ,  Akifumi Adachi

Inventor： Tadahiro Sato ,  Akifumi Adachi

IPC: H04B1/06 ,  H04Q7/20

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

Abstract: 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.

Abstract translation: 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：US07304539B2

公开(公告)日：2007-12-04

申请号：US10960097

申请日：2004-10-08

Applicant: Hirokazu Tsurumaki ,  Hiroyuki Nagai ,  Tomio Furuya ,  Makoto Ishikawa

Inventor： Hirokazu Tsurumaki ,  Hiroyuki Nagai ,  Tomio Furuya ,  Makoto Ishikawa

IPC: H03G3/10

CPC classification number: H03G1/0005 ,  H03F1/301 ,  H03F2200/294 ,  H03F2200/372 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40

Abstract: In a high frequency power amplifier circuit that supplies a bias to an amplifying FET by a current mirror method, scattering of a threshold voltage Vth due to the scattering of the channel impurity concentration of the FET, and a shift of a bias point caused by the scattering of the threshold voltage Vth and a channel length modulation coefficient λ due to a short channel effect are corrected automatically. The scattering of a high frequency power amplifying characteristic can be reduced as a result.

Abstract translation: 在通过电流镜法向放大FET提供偏置的高频功率放大器电路中，由于FET的沟道杂质浓度的散射引起的阈值电压Vth的散射和由 自动校正阈值电压Vth的散射和由于短通道效应引起的通道长度调制系数λ。 结果可以降低高频功率放大特性的散射。

公开(公告)号：US20070230635A1

公开(公告)日：2007-10-04

申请号：US11278527

申请日：2006-04-03

Applicant: Leif Wilhelmsson ,  Jim Svensson ,  Lars Sundstrom

Inventor： Leif Wilhelmsson ,  Jim Svensson ,  Lars Sundstrom

IPC: H04L27/08 ,  H04K1/10

CPC classification number: H04L27/2647 ,  H03G3/3052 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H04L25/0202 ,  H04L27/2607

Abstract: In communication systems where the channel is expected to vary during a communication burst, gain adjustments during the communication burst can be implemented by automatic gain control (AGC) in the receiver, with minimal performance degradation. These gain adjustments are successfully accommodated by virtue of suitable information-sharing between an AGC unit and a digital baseband part. The digital baseband part can direct the AGC unit appropriately to ensure that gain adjustments are implemented during time intervals that do not carry substantive communication information (e.g., guard intervals). In receivers that perform channel estimation in the digital baseband part, the AGC unit supports channel estimation by informing the digital baseband part about the timing of the gain adjustment. The AGC unit can also support channel estimation by informing the digital baseband part about the size of the gain adjustment.

Abstract translation: 在通信期望信道在通信突发期间变化的通信系统中，通信突发期间的增益调整可以通过接收机中的自动增益控制（AGC）来实现，性能下降最小。 通过AGC单元和数字基带部分之间的合适的信息共享，可以成功地适应这些增益调整。 数字基带部分可以适当地引导AGC单元，以确保在不携带实质性通信信息（例如，保护间隔）的时间间隔期间实现增益调整。 在数字基带部分进行信道估计的接收机中，AGC单元通过向数字基带部分通知增益调整的定时来支持信道估计。 AGC单元还可以通过向数字基带部分通知增益调整的大小来支持信道估计。

公开(公告)号：US07257379B2

公开(公告)日：2007-08-14

申请号：US10713613

申请日：2003-11-14

Applicant: Fatih Ozluturk ,  Leonid Kazakevich ,  Kenneth P. Kearney ,  Geetha Lakshmi Narayan ,  Alpaslan Demir ,  Tanbir Haque

Inventor： Fatih Ozluturk ,  Leonid Kazakevich ,  Kenneth P. Kearney ,  Geetha Lakshmi Narayan ,  Alpaslan Demir ,  Tanbir Haque

IPC: H04B1/38

CPC classification number: H03G3/001 ,  H03D3/008 ,  H03D3/009 ,  H03G3/3068 ,  H03G3/3089 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/307 ,  H03G2201/508 ,  H04B1/30 ,  H04L2027/0016 ,  H04L2027/0024

Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component tolerances of an analog radio, a future system architecture (FSA) wireless communication transceiver employs numerous digital signal processing (DSP) techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic gain control (AGC) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency (RF) parameters.

Abstract translation: 为了补偿由模拟无线电的低成本模拟无线电组件公差引起的性能下降，未来的系统架构（FSA）无线通信收发器采用多种数字信号处理（DSP）技术来补偿这种模拟组件的缺陷， 现代规格可能放宽。 在数字域中提供自动增益控制（AGC）功能，以提供增强的相位和幅度补偿以及许多其他射频（RF）参数。

公开(公告)号：US07248846B2

公开(公告)日：2007-07-24

申请号：US10765871

申请日：2004-01-29

Applicant: Hiroyuki Kayano ,  Yuta Araki ,  Yuuji Ohtsuka

Inventor： Hiroyuki Kayano ,  Yuta Araki ,  Yuuji Ohtsuka

IPC: H04B1/04 ,  H04B17/00 ,  H04B1/16

CPC classification number: H03G3/3042 ,  H03F1/0211 ,  H03F1/0277 ,  H03F1/3229 ,  H03F3/72 ,  H03G1/0088 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307

Abstract: An amplifier comprises a first amplifier circuit which amplifies a first signal to output an amplified first signal, a circuit which outputs a second signal corresponding to a difference between the first signal and the amplified first signal, a second amplifier circuit which amplifies the second signal to output an amplified second signal, a combine circuit which outputs an amplified signal by combining the amplified second signal with the amplified first signal, and a controller which controls a supply of a power to the first amplifier circuit and the second amplifier circuit and has a first mode to supply the power to the second amplifier circuit without supplying the power to the first amplifier circuit.

Abstract translation: 放大器包括放大第一信号以输出放大的第一信号的第一放大器电路，输出对应于第一信号和放大的第一信号之间的差的第二信号的电路，将第二信号放大到 输出放大的第二信号，组合电路，其通过将放大的第二信号与放大的第一信号组合来输出放大信号，以及控制器，其控制向第一放大器电路和第二放大器电路供电，并具有第一 模式，以向第二放大器电路供电，而不向第一放大器电路供电。

公开(公告)号：US07230491B1

公开(公告)日：2007-06-12

申请号：US11175943

申请日：2005-07-05

Applicant: Xiaodong Jin ,  Lawrence Tse ,  King Chun Tsai ,  George Chien

Inventor： Xiaodong Jin ,  Lawrence Tse ,  King Chun Tsai ,  George Chien

IPC: H03G3/10

CPC classification number: H03G1/0029 ,  H03G1/007 ,  H03G2201/103

Abstract: A bias circuit for biasing a linear input stage of an amplifier comprises a first MOS device having a size. A second MOS device has a size and is arranged with the first MOS device in a cascode configuration. The second MOS device is operated in a saturation region. A third MOS device has a size and biases the first MOS device in a triode region. A bias switch ratio of the size of the first MOS device to the size of the third MOS device is greater than one.

Abstract translation: 用于偏置放大器的线性输入级的偏置电路包括具有大小的第一MOS器件。 第二MOS器件具有尺寸并与第一MOS器件配置成共源共栅配置。 第二MOS器件在饱和区域中工作。 第三MOS器件具有尺寸并偏置三极管区域中的第一MOS器件。 第一MOS器件的尺寸与第三MOS器件的尺寸的偏置开关比大于1。

公开(公告)号：US07127223B2

公开(公告)日：2006-10-24

申请号：US11189941

申请日：2005-07-26

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

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

IPC: H04B1/06

CPC classification number: H03G3/3052 ,  H03G2201/103 ,  H03G2201/204 ,  H03G2201/305 ,  H03G2201/706

Abstract: 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.

Abstract translation: 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。