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    Method and Apparatus For Automatic Gain Control
    5.
    发明申请
    Method and Apparatus For Automatic Gain Control 审中-公开
    自动增益控制的方法和装置

    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。

    Dynamically varying linearity system for an RF front-end of a communication device
    6.
    发明授权
    Dynamically varying linearity system for an RF front-end of a communication device 失效
    用于通信设备的RF前端的动态变化的线性系统

    公开(公告)号：US06560446B2

    公开(公告)日：2003-05-06

    申请号：US09811082

    申请日：2001-03-16

    Applicant: Balasubramanian Ramachandran

    Inventor： Balasubramanian Ramachandran

    IPC: H04Q720

    CPC classification number: H04W52/267 ,  H03G3/004 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/307 ,  H03G2201/40 ,  H03G2201/508 ,  H04B1/109 ,  H04L1/0001 ,  H04W52/08 ,  H04W52/38

    Abstract: A dynamically varying linearity system “DVLS” capable of varying the linearity of a radio frequency (RF) front-end of a communication device responsive to receiving a condition signal indicating a desired mode of operation of a transmitter. The DVLS may include a condition signal indicative of the desired mode of operation and a controller that adjusts the linearity of the transmitter responsive to the condition signal. The condition signal may be responsive to a user interface. The controller, responsive to the condition signal, may dynamically adjust the operating current of the transmitter.

    Abstract translation: 一种动态变化的线性系统“DVLS”，其能够响应于接收到指示发射机的所需操作模式的条件信号而改变通信设备的射频（RF）前端的线性度。 DVLS可以包括指示期望的操作模式的条件信号和响应于条件信号来调整发射机的线性度的控制器。 条件信号可以响应于用户界面。 控制器响应于条件信号，可以动态地调整发射机的工作电流。

    System and method for minimizing dissipation in RF power amplifiers
    8.
    发明授权
    System and method for minimizing dissipation in RF power amplifiers 有权
    用于最小化RF功率放大器散热的系统和方法

    公开(公告)号：US06683496B2

    公开(公告)日：2004-01-27

    申请号：US09931737

    申请日：2001-08-20

    Applicant: Peter John Poggi ,  Tim Dittmer ,  George Cabrera

    Inventor： Peter John Poggi ,  Tim Dittmer ,  George Cabrera

    IPC: H03G516

    CPC classification number: H03G3/3042 ,  H03F1/0222 ,  H03F1/0233 ,  H03F1/0244 ,  H03F1/0277 ,  H03F3/211 ,  H03G3/004 ,  H03G2201/103 ,  H03G2201/504 ,  H03G2201/508 ,  H03G2201/702

    Abstract: The variable power supply to an amplifier in an electrical circuit is dynamically controlled through the use of a lookup table responsive to one or more operating conditions of the electrical circuit. The lookup table is indexed by one or more of the operating conditions and the amount of amplification to be applied to an input signal to the amplifier is determined. One embodiment of the invention comprises a television transmitter circuit including a power amplifier circuit capable of amplifying a variable frequency COFDM or 8VSB input signal where the amount of amplification applied to the input signal is dynamically controlled through the use of a lookup table as a function of the frequency of the input signal.

    Abstract translation: 通过使用响应于电路的一个或多个操作条件的查找表来动态地控制电路中的放大器的可变电源。 查找表由一个或多个操作条件索引，并确定要施加到放大器的输入信号的放大量。 本发明的一个实施例包括一种电视发射机电路，其包括能够放大可变频率COFDM或8VSB输入信号的功率放大器电路，其中通过使用查找表作为函数来动态地控制施加到输入信号的放大量 输入信号的频率。

    COMPENSATION METHOD FOR CHARACTERISTIC DIFFERENCE OF PHOTOELECTRIC ELEMENT
    10.
    发明公开
    COMPENSATION METHOD FOR CHARACTERISTIC DIFFERENCE OF PHOTOELECTRIC ELEMENT 审中-公开

    公开(公告)号：US20240178809A1

    公开(公告)日：2024-05-30

    申请号：US18080179

    申请日：2022-12-13

    Applicant: Teco Image Systems Co., Ltd.

    Inventor： Kuei-Chung Chang

    IPC: H03G3/00 ,  H03G3/30

    CPC classification number: H03G3/007 ,  H03G3/3015 ,  H03G2201/506 ,  H03G2201/508

    Abstract: A compensation method for a characteristic difference of a photoelectric element is disclosed. The method includes (S1) providing a test substrate with a connector, a photoelectric element and a plurality of gain units, wherein the plurality of gain units are connected in parallel, and each gain unit includes a gain resistor and a disconnection port; (S2) connecting the connector to a test fixture which includes a test resistor and a test control unit, wherein when the test fixture is connected with the connector, the test resistor is electrically connected between the second pin and the third pin; (S3) providing input power to the connector so as to generate a test voltage on the photoelectric element; (S4) selecting the corresponding gain unit according to the test voltage and a classification data table; (S5) driving a production line to connect the first contact and the second contact of the selected gain unit.

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