Multimode fast attack automatic gain control (AGC) loop for narrow band receivers
    1.
    发明授权
    Multimode fast attack automatic gain control (AGC) loop for narrow band receivers 有权
    用于窄带接收机的多模式快速攻击自动增益控制(AGC)回路

    公开(公告)号:US06324230B1

    公开(公告)日:2001-11-27

    申请号:US09515741

    申请日:2000-02-29

    IPC分类号: H04L2708

    摘要: A multimode fast attack automatic gain control (AGC) circuit (100) includes an analog feedback loop and a digital feedback loop. The analog feedback loop is switched into the amplifier stage (102) by a first switch (126) when dynamic control of the gain attenuation is desired. The digital feedback loop is switched into the amplifier stage when attenuation is to be adjusted periodically, such as between sequentially received time slots in a time division multiple access (TDMA) mode of communication.

    摘要翻译: 多模式快速攻击自动增益控制(AGC)电路(100)包括模拟反馈回路和数字反馈回路。 当需要增益衰减的动态控制时,模拟反馈环路由第一开关(126)切换到放大器级(102)。 当周期性地调整衰减时,例如在时分多址(TDMA)通信模式中的顺序接收的时隙之间,数字反馈环路被切换到放大器级。

    Method for acquiring a rapid automatic gain control (AGC) response in a
narrow band receiver
    2.
    发明授权
    Method for acquiring a rapid automatic gain control (AGC) response in a narrow band receiver 失效
    用于在窄带接收机中获取快速自动增益控制(AGC)响应的方法

    公开(公告)号:US5724652A

    公开(公告)日:1998-03-03

    申请号:US736177

    申请日:1996-10-24

    IPC分类号: H03G3/30 H04B1/06

    CPC分类号: H03G3/3052

    摘要: A method for acquiring rapid automatic gain control (AGC) response in a narrow band receiver teaches opening the AGC loop (100), setting the gain control signal (106) amplitude of the AGC amplifier stage (104) to a known value, altering the gain control signal (106) amplitude over time, and monitoring the narrow band receiver for an output signal (112). Upon output signal (112) detection, halting alteration of the gain control signal (106) amplitude, closing the AGC loop (100) and commencing normal operation. A particular facet of this approach suggests detecting the output (112) with a varying gain detector (116,132) after the loop (100) is closed and before normal operations are commenced.

    摘要翻译: 用于在窄带接收机中获取快速自动增益控制(AGC)响应的方法教导打开AGC环路(100),将AGC放大器级(104)的增益控制信号(106)振幅设置为已知值,改变 增益控制信号(106)随时间变化,以及监测窄带接收机的输出信号(112)。 在输出信号(112)检测时,停止增益控制信号(106)的振幅,闭合AGC回路(100)并开始正常运行。 该方法的特定方面建议在循环(100)关闭之后并且在正常操作开始之前用变化增益检测器(116,132)检测输出(112)。

    Fast attack automatic gain control (AGC) loop for narrow band receivers
    3.
    发明授权
    Fast attack automatic gain control (AGC) loop for narrow band receivers 失效
    用于窄带接收机的快速攻击自动增益控制(AGC)回路

    公开(公告)号:US5742899A

    公开(公告)日:1998-04-21

    申请号:US735926

    申请日:1996-10-24

    IPC分类号: H03G3/20 H03G3/30 H04B1/16

    CPC分类号: H03G3/3052 H03G3/3036

    摘要: A fast attack Automatic Gain Control (AGC) loop (100) having a first feedback loop with selectable responses shapes and a second feedback loop with selectable responses shapes. Response shape selection is based, in part, upon fast pull-down, overshoot recovery, and normal mode loop operation.

    摘要翻译: 具有具有可选响应形状的第一反馈回路和具有可选响应形状的第二反馈回路的快速攻击自动增益控制(AGC)回路(100)。 响应形状选择部分基于快速下拉,过冲恢复和正常模式循环操作。

    Transmission line filter having a varactor for tuning a transmission zero
    4.
    发明授权
    Transmission line filter having a varactor for tuning a transmission zero 失效
    具有用于调谐传输零点的变容二极管的传输线滤波器

    公开(公告)号:US5241291A

    公开(公告)日:1993-08-31

    申请号:US726109

    申请日:1991-07-05

    申请人: Dane E. Blackburn

    发明人: Dane E. Blackburn

    IPC分类号: H01P1/203 H01P7/08

    摘要: A transmission line structure (100) is provided which includes a resonator (110) having open ends (118) disposed on a substrate (130). The first resonator (110) includes a control voltage terminal (116) which is positioned at a point along the length where a zero potential exists at resonant frequency. Transmission zero frequency is tuned by means of a varactor (150) which is coupled to the control voltage terminal and receives a control voltage for controlling the zero frequency.

    摘要翻译: 提供一种传输线结构(100),其包括设置在基板(130)上的具有开口端(118)的谐振器(110)。 第一谐振器(110)包括控制电压端子(116),该控制电压端子位于沿谐振频率存在零电位的长度的点处。 变速器零频率通过耦合到控制电压端子的变容二极管(150)进行调谐,并接收用于控制零频率的控制电压。

    Fast attack automatic gain control (AGC) loop and methodology for narrow band receivers
    5.
    发明授权
    Fast attack automatic gain control (AGC) loop and methodology for narrow band receivers 失效
    快速攻击自动增益控制(AGC)循环和窄带接收机的方法

    公开(公告)号:US06418303B1

    公开(公告)日:2002-07-09

    申请号:US09515293

    申请日:2000-02-29

    IPC分类号: H04B106

    CPC分类号: H03G3/3052

    摘要: A fast attack Automatic Gain Control (AGC) loop (100) having the capability to selectably shape one or more decaying current sources (242, 260) contained within an off-channel feedback loop and an on-channel feedback loop of the AGC loop by sequentially and selectively switching out weighted transistors (Tr0, Tr1, Tr2, . . . , Tr10) of a plurality of weighted current mirrors (313, 379, 453, 519) at predetermined intervals (t0, t1, t2, . . . , t10).

    摘要翻译: 具有能够选择地形成包含在离线通道反馈回路内的一个或多个衰减电流源(242,260)的能力的快速攻击自动增益控制(AGC)回路(100),以及AGC回路的通道内反馈环路 以预定间隔(t0,t1,t2,...,...)顺序选择性地切换多个加权电流镜(313,397,453,519)的加权晶体管(Tr0,Tr1,Tr2,...,Tr10) t10)。

    Micro strip filter having a varactor coupled between two microstrip line
resonators
    6.
    发明授权
    Micro strip filter having a varactor coupled between two microstrip line resonators 失效
    微带滤波器具有耦合在两个微带线谐振器之间的变容二极管

    公开(公告)号:US5138288A

    公开(公告)日:1992-08-11

    申请号:US676023

    申请日:1991-03-27

    申请人: Dane E. Blackburn

    发明人: Dane E. Blackburn

    IPC分类号: H01P1/203

    CPC分类号: H01P1/20363

    摘要: A transmission line filter is provided which includes a first resonator having open ends being coupled to a second resonator disposed on a substrate. A transmission zero frequency is tuned by means of a varactor which is coupled between the first and the second resonator. The first resonator includes a terminal for applying a control voltage to the varactor for varying its capacitance.

    摘要翻译: 提供一种传输线滤波器,其包括具有开口端的第一谐振器,耦合到设置在基板上的第二谐振器。 传输零频率通过耦合在第一和第二谐振器之间的变容二极管来调谐。 第一谐振器包括用于向变容二极管施加控制电压以改变其电容的端子。