公开(公告)号：EP1363403B1

公开(公告)日：2005-08-17

申请号：EP02010952.6

申请日：2002-05-16

申请人： Sony International (Europe) GmbH

发明人： Wildhagen, Jens, Advanced Technology Ct. Stuttgart

IPC分类号： H03M1/18 ,  H04B1/06

CPC分类号： H04B1/109 ,  H03M1/185

公开(公告)号：EP1553698A1

公开(公告)日：2005-07-13

申请号：EP02760664.9

申请日：2002-08-20

申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： INOUE, Yuji c/o Mitsubishi Denki Kabushiki Kaisha ,  SHIMIZU, H. c/o Mitsubishi Denki Kabushiki Kaisha

IPC分类号： H03G3/30

CPC分类号： H03M1/185 ,  H03G3/001 ,  H03G3/3052 ,  H03G3/3078

摘要： A gain control method and a gain control device for comparing output power (Wo) of a variable gain amplifier (4) with target power (Wd) and controlling the gain of the variable gain amplifier (4) in accordance with a comparison result, characterized in that plural gain control cycles are executed while changing a control gain difference determined as the difference between a gain which has been already set in the variable gain amplifier (4) and a gain which is newly set. According to the present invention, there can be implemented the gain control device and the gain control method for controlling the gain of the amplifier at high speed, and a receiver (1) and a cellular phone which are provided with the gain control device (4).

摘要翻译： 一种用于将可变增益放大器（4）的输出功率（Wo）与目标功率（Wd）进行比较并根据比较结果控制可变增益放大器（4）的增益的增益控制方法和增益控制装置，其特征在于 因为在改变被确定为可变增益放大器（4）中已经设置的增益与新设置的增益之间的差的控制增益差时，执行多个增益控制周期。 根据本发明，可以实现用于高速控制放大器的增益的增益控制装置和增益控制方法，以及设置有增益控制装置（4）的接收机（1）和蜂窝电话 ）。

公开(公告)号：EP1183782B1

公开(公告)日：2005-02-16

申请号：EP00938499.1

申请日：2000-04-20

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： ROHE, Christoph ,  FALKENBERG, Andreas ,  NIEMEYER, Ulf

IPC分类号： H03M1/18

CPC分类号： H03M1/185

摘要： The invention relates to a method and circuit for regulating the signal level fed to an analog-digital converter. In order to regulate the signal level fed to an analog-digital converter, the rate of change at which the output signal of the analog-digital converter (4) is temporally modified, especially the modification rate of an output bit of the analog-digital converter, is measured and compared with the specified value (SP). The signal level fed to the analog-digital converter (4) is adjusted according to the result of this comparison.

公开(公告)号：EP1175004A4

公开(公告)日：2005-01-19

申请号：EP01906209

申请日：2001-02-22

申请人： MITSUBISHI ELECTRIC CORP

发明人： HAYASHI RYOJI

IPC分类号： H03G3/20 ,  H03G3/30 ,  H03M1/18

CPC分类号： H03G3/3052 ,  H03M1/185

摘要： An automatic gain control method for quickly dissolving the saturation of an A/D converter even if the input power level of a radio reception signal sharply increases and preventing the control from becoming unstable even if a periodic level variation occurs. A DSP subtracts the output power level of the A/D converter from a reference level to determine the difference between the reference level and the output power level. If the difference is negative, that is, the gain of a variable grain amplifier is to be decreased, the DSP controls the gain of the variable gain amplifier according to a first grain variation width determined on the basis of the difference. Contrarily if the difference is positive, that is, the grain of the variable gain amplifier is to be increased, the DSP controls the gain of the variable gain amplifier according to a second gain variation width smaller than the first gain variation width. Thus, even if the input power level of the variable gain amplifier abruptly increases, the increase of the output power level of the variable gain amplifier can be suppressed.

公开(公告)号：EP1473831A1

公开(公告)日：2004-11-03

申请号：EP03009564.0

申请日：2003-04-28

申请人： CoreOptics, Inc., c/o The Corporation Trust Center

发明人： Stojanovic, Nebojsa, Prof., Dr. ,  Langenbach, Stephan

IPC分类号： H03G3/30 ,  H03M1/18

CPC分类号： H03G3/3078 ,  H03G3/001 ,  H03G3/3052 ,  H03G3/3068 ,  H03M1/185

摘要： This invention relates to a method for controlling an amplification within a receiver. The gain of a variable gain amplifier which amplifies an input signal to obtain a gain-controlled signal is set. Said gain controlled signal is analog-to-digital converted. Thereby digital words are generated. Each digital word has a value out of a plurality of possible digital values. Digital words having a value within a first and a second subset of the possible digital values are counted in order to generate a first and a second counter value. The gain is set in accordance with the first and second counter values in a fashion that all counter values are as equal as possible. Furthermore, this invention is related to a circuit to be used within a receiver for adjusting the gain of a variable gain amplifier in order to ensure a proper analog-to-digital conversion.

摘要翻译： 本发明涉及一种用于控制接收机内的放大的方法。 设置放大输入信号以获得增益控制信号的可变增益放大器的增益。 所述增益控制信号被模数转换。 从而产生数字字。 每个数字字都具有多个可能的数字值中的值。 对可能的数字值的第一和第二子集内的值进行计数的数字字被计数以产生第一和第二计数器值。 按照所有计数器值尽可能相等的方式，根据第一和第二计数器值设置增益。 此外，本发明涉及一种用于调节可变增益放大器的增益的接收机内使用的电路，以确保正确的模数转换。

公开(公告)号：EP1061643A3

公开(公告)日：2004-09-15

申请号：EP00250178.1

申请日：2000-06-08

申请人： NEC CORPORATION

发明人： Takaki, Tetsuya

IPC分类号： H03G3/20

CPC分类号： H03M1/185 ,  H03G1/0088 ,  H03G3/3052

摘要： A plurality of target values for generating a gain control signal are provided such that switching is performed between the target values with a baseband signal processing unit. Specifically, the baseband signal processing unit monitors the state of a received signal to select an appropriate one of the target values based on the monitoring result. The selected target value is compared with a received power amount to generate the gain control signal. When saturation occurs at input ends of A/D converters for digital processing of the received signal, the target value is switched to the next lower target value. Thus, even when the received signal includes an interference wave in addition to a desired wave, saturation at the input ends of the A/D converters due to the interference wave is prevented, thereby making it possible to maintain favorable reception characteristics and suppression of an increased bit error rate in digital communication.

摘要翻译： 提供了用于产生增益控制信号的多个目标值，使得在目标值之间执行与基带信号处理单元的切换。 具体地，基带信号处理单元基于监视结果监视接收信号的状态，以选择目标值中的适当的一个。 将所选择的目标值与接收功率量进行比较以产生增益控制信号。 当在接收信号的数字处理的A / D转换器的输入端发生饱和时，目标值被切换到下一个较低的目标值。 因此，即使接收到的信号除了期望的波之外还包括干扰波，也可以防止由于干扰波而导致的A / D转换器的输入端的饱和，从而可以保持良好的接收特性和抑制 增加数字通信中的误码率。

公开(公告)号：EP1091493A3

公开(公告)日：2004-01-02

申请号：EP00308808.5

申请日：2000-10-06

申请人： STMicroelectronics, Inc.

发明人： McCall, Kevin J.

IPC分类号： H03M1/18 ,  G06K7/00 ,  H03H17/02

CPC分类号： H03M1/185

摘要： In a method for determining the actual amplitude of signal relative to a predetermined amplitude two samples of the signal are squared to produce two squared samples, and the sum of the two squared samples minus the square of the predetermined amplitude is calculated to produce a difference of squares. A shift operation is performed on the difference of squares to determine a difference between the actual amplitude and the predetermined amplitude. Preferably two consecutive samples of the signal are taken at four times the frequency of the signal. A circuit device includes an A/D converter, a variable gain amplifier, and a feedback loop. The A/D converter converts an analog signal into a digital signal, and the variable gain amplifier adjusts the amplitude of the analog signal. The feedback loop controls the variable gain amplifier based on a difference between the amplitude of the analog signal and a predetermined amplitude and calculates the difference.

公开(公告)号：EP1233615A1

公开(公告)日：2002-08-21

申请号：EP02002536.7

申请日：2002-02-04

申请人： Thomson Licensing S.A.

发明人： Le Naour, Jean Yves ,  Hirtzlin, Patrice ,  Mocquard, Olivier

IPC分类号： H04N5/52 ,  H04N7/20

CPC分类号： H04N7/20 ,  H03M1/08 ,  H03M1/185 ,  H04N5/52

摘要： The invention aims to minimize the analogue/digital converter over-dimensioning within the framework of reception of signals originating from a satellite and exhibiting power levels which can vary over time. The invention proposes a technique of automatic gain control which handles the setting of the noise level associated with the amplified signal. The automatic gain control is achieved by neutralizing the signal received by the antenna, and by adjusting the gain during the neutralization of the signal received until a predetermined noise level is obtained at the end of the reception facility. The invention also pertains to a device comprising the means for implementing the method.

摘要翻译： 本发明旨在最小化在从卫星发出的信号的接收的框架内的模拟/数字转换器过量化，并且显示可随时间变化的功率电平。 本发明提出一种自动增益控制技术，其处理与放大信号相关联的噪声电平的设置。 自动增益控制是通过中和天线接收的信号，并通过调节接收到的信号中和期间的增益来实现的，直到在接收设施结束时获得预定的噪声电平。 本发明还涉及一种包括用于实现该方法的装置的装置。

公开(公告)号：EP1183782A1

公开(公告)日：2002-03-06

申请号：EP00938499.1

申请日：2000-04-20

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： ROHE, Christoph ,  FALKENBERG, Andreas ,  NIEMEYER, Ulf

IPC分类号： H03M1/18

CPC分类号： H03M1/185

摘要： The invention relates to a method and circuit for regulating the signal level fed to an analog-digital converter. In order to regulate the signal level fed to an analog-digital converter, the rate of change at which the output signal of the analog-digital converter (4) is temporally modified, especially the modification rate of an output bit of the analog-digital converter, is measured and compared with the specified value (SP). The signal level fed to the analog-digital converter (4) is adjusted according to the result of this comparison.

公开(公告)号：EP1175004A1

公开(公告)日：2002-01-23

申请号：EP01906209.0

申请日：2001-02-22

申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： HAYASHI, Ryoji Mitsubishi Denki Kabushiki Kaisha

IPC分类号： H03G3/20

CPC分类号： H03G3/3052 ,  H03M1/185

摘要： An automatic gain control method is provided in which, even when an input power level of a received radio signal is increased abruptly, saturation of an analog-to-digital converter is cancelled in a short period of time, and in which control is prevented from becoming unstable even when a periodic variation in power level occurs. A DSP determines a differential value by subtracting a power level of the analog-to-digital converter from a reference level. When the differential value is negative, i.e., when a gain of a variable gain amplifier is to be decreased, the DSP controls the gain of the variable gain amplifier, based on a first magnitude of variation in gain determined based on the differential value. When the differential value is positive, i.e., when the gain of the variable gain amplifier is to be increased, the DSP controls the gain of the variable gain amplifier, based on a second magnitude of variation in gain smaller than the first magnitude of variation in gain. With this, even when the input power level the of variable gain amplifier is increased abruptly, the magnitude of increase in the output power level of the variable gain amplifier is suppressed.

摘要翻译： 在其中提供了一种自动增益控制方法，即使在接收的无线电信号的输入功率电平。当突然增加，一个模拟 - 数字转换器的饱和度在很短的时间周期被取消，并且其中控制从防治 成为即使在功率水平的周期性变化出现不稳定。 甲DSP bestimmt通过从参考电平中减去所述模拟数字转换器的功率电平的差分的值。 当微分值是负的，即，当可变增益放大器的增益将被减小时，DSP控制可变增益放大器的增益，基于变化的增益确定性第一量值矿洞基于所述差分值。 当差分值为正时，即，当可变增益放大器的增益将被增加时，DSP控制可变增益放大器的增益，基于变化的增益比的变化在第一幅度小的第二幅度 获得。 由此，即使当可变增益放大器的输入功率电平急剧增加，在可变增益放大器的输出功率电平增加的幅度被抑制。