公开(公告)号：US08559903B2

公开(公告)日：2013-10-15

申请号：US13299581

申请日：2011-11-18

Applicant: Henk Ten Pierick ,  Gertjan Groot Hulze ,  Erik Keukens

Inventor： Henk Ten Pierick ,  Gertjan Groot Hulze ,  Erik Keukens

IPC: H04B1/06 ,  H04B7/00

CPC classification number: H03G3/3052 ,  H03G3/301 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/606

Abstract: An automatic gain control circuit is provided for an input signal in the form of a dc reference level and a superposed amplitude modulated ac data signal. A feedforward AGC loop has a low pass filter for deriving the level of attenuation from the attenuated dc reference level. A multiplier value (G) is based on the reciprocal of the level of attenuation (α) and this multiplier enables an output signal to be generated comprising a constant multiple (DG) of the input signal.

Abstract translation: 为直流基准电平和重叠幅度调制交流数据信号形式的输入信号提供自动增益控制电路。 前馈AGC环路具有用于从衰减的直流参考电平导出衰减电平的低通滤波器。 乘数值（G）基于衰减电平（α）的倒数，并且该乘法器使得能够产生包括输入信号的恒定倍数（DG）的输出信号。

公开(公告)号：US20120129478A1

公开(公告)日：2012-05-24

申请号：US13299581

申请日：2011-11-18

Applicant: Henk Ten Pierick ,  Gertjan Groot Hulze ,  Erik Keukens

Inventor： Henk Ten Pierick ,  Gertjan Groot Hulze ,  Erik Keukens

IPC: H04B1/16 ,  H03G3/20

CPC classification number: H03G3/3052 ,  H03G3/301 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/606

Abstract: An automatic gain control circuit is provided for an input signal in the form of a dc reference level and a superposed amplitude modulated ac data signal. A feedforward AGC loop has a low pass filter for deriving the level of attenuation from the attenuated dc reference level. A multiplier value (G) is based on the reciprocal of the level of attenuation (α) and this multiplier enables an output signal to be generated comprising a constant multiple (DG) of the input signal.

Abstract translation: 为直流基准电平和重叠幅度调制交流数据信号形式的输入信号提供自动增益控制电路。 前馈AGC环路具有用于从衰减的直流参考电平导出衰减电平的低通滤波器。 乘法器值（G）基于衰减电平（α）的倒数，并且该乘法器使得能够产生包括输入信号的恒定倍数（DG）的输出信号。

公开(公告)号：US20090252347A1

公开(公告)日：2009-10-08

申请号：US12125638

申请日：2008-05-22

Applicant: Srinath Kakkeri ,  Mahabaleshwara R. Bhatt ,  Sridhar Gurram ,  Mazhar K.U Sameullah ,  Narsinga Rao Chella

Inventor： Srinath Kakkeri ,  Mahabaleshwara R. Bhatt ,  Sridhar Gurram ,  Mazhar K.U Sameullah ,  Narsinga Rao Chella

IPC: H03G3/00

CPC classification number: H03G3/3026 ,  H03G2201/508 ,  H03G2201/606

Abstract: A method and apparatus for Automatic Gain Control (AGC) that provides an output signal having a smooth gain variation for any input signal. The various embodiments assure that the output signal will reach a required output level in a specified attack or decay period. A curvilinear reference gain characteristic is applied to the gain variations. One example uses an exponential curve and sets an initial and final value of the gain law for both attack and decay periods as presets. The various embodiments further compute intermediate gain values of the curvilinear paths that archives the smooth variations is also proposed. Other possible curvilinear characteristics may be used such as, but not limited to, logarithmic, hyperbolic, sinusoidal, etc. that are expressible as exponentials. Intermediate gain values may be determined either by table lookup or by on the fly computation of the curvilinear characteristic.

Abstract translation: 一种用于自动增益控制（AGC）的方法和装置，其提供对于任何输入信号具有平滑增益变化的输出信号。 各种实施例确保输出信号将在指定的攻击或衰减期内达到所需的输出电平。 曲线参考增益特性应用于增益变化。 一个例子使用指数曲线，并将攻击和衰减周期的增益定律的初始值和最终值设置为预设。 各种实施例进一步计算了还提出了归档平滑变化的曲线路径的中间增益值。 可以使用其他可能的曲线特征，例如但不限于作为指数表示的对数，双曲线，正弦曲线等。 中间增益值可以通过表查找或曲线特征的飞行计算来确定。