公开(公告)号：US20090252347A1

公开(公告)日：2009-10-08

申请号：US12125638

申请日：2008-05-22

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

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

IPC分类号： H03G3/00

CPC分类号： H03G3/3026 ,  H03G2201/508 ,  H03G2201/606

摘要： 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.

摘要翻译： 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。