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169 条记录 (耗时 0.02 秒)

    Six port linear network single wire multi switch transceiver
    64.
    发明授权
    Six port linear network single wire multi switch transceiver 有权
    六端口线性网络单线多开关收发器

    公开(公告)号：US08699983B2

    公开(公告)日：2014-04-15

    申请号：US12450418

    申请日：2008-03-26

    申请人： Lincheng Xiu ,  John James Fitzpatrick

    发明人： Lincheng Xiu ,  John James Fitzpatrick

    IPC分类号： H04B1/18 ,  H03H2/00 ,  H03H3/06 ,  H03H7/01 ,  H03J3/06 ,  H03J3/24

    CPC分类号： H03H2/008 ,  H01Q1/247 ,  H01Q1/50 ,  H03F1/52 ,  H03F3/189 ,  H03H3/06 ,  H03H7/0138 ,  H03J3/06 ,  H03J3/24 ,  H04H40/90 ,  H04N7/20

    摘要： A fluid sensor comprises a sensor housing (12), a sensor package (14), an actuator (16) and a switch (18). The sensor package (14) is disposed within the sensor housing (12) and includes first and second screens and at least one sensing membrane. The sensing membrane is disposed between the first and second screens (36) and is adapted to expand when exposed to a predetermined quantity of a first predetermined fluid. The actuator (16) is disposed proximate the sensor package (14) within the sensor housing (12) and moveable between a first position and a second position through an intermediate position. The switch (18) is disposed proximate the actuator (16) and is operable between closed and open positions. When the actuator (16) is in the second position at least a portion of the actuator (16) depresses the switch (18) to control an-electrical, circuit connected therewith.

    摘要翻译： 流体传感器包括传感器壳体（12），传感器封装（14），致动器（16）和开关（18）。 传感器封装（14）设置在传感器外壳（12）内并且包括第一和第二屏幕以及至少一个传感膜。 感测膜设置在第一和第二筛网（36）之间，并且适于当暴露于预定量的第一预定流体时膨胀。 致动器（16）设置在传感器外壳（12）内靠近传感器封装（14）处，并通过中间位置在第一位置和第二位置之间移动。 开关（18）设置在致动器（16）附近并且可在闭合位置和打开位置之间操作。 当致动器（16）处于第二位置时，致动器（16）的至少一部分按压开关（18）以控制与其连接的电气电路。

    Automatic antenna tuning unit for software-defined and cognitive radio
    65.
    发明授权
    Automatic antenna tuning unit for software-defined and cognitive radio 有权
    用于软件定义和认知无线电的自动天线调谐单元

    公开(公告)号：US08095085B2

    公开(公告)日：2012-01-10

    申请号：US12134438

    申请日：2008-06-06

    申请人： Hang Song ,  James T. Aberle ,  Bertan Bakkaloglu

    发明人： Hang Song ,  James T. Aberle ,  Bertan Bakkaloglu

    IPC分类号： H03C1/52 ,  H04K3/00

    CPC分类号： H03J3/06 ,  H03J2200/10

    摘要： A closed-loop controlled antenna tuning unit (ATU) system includes a return loss detector connected to sample an RF signal generated by a signal source to provide a return loss signal. A matching state searching circuit is connected to receive the return loss signal and, in response, selectively store a return loss value and an impedance matching state. A central controller is connected to provide a switch control signal and apply an optimum matching state to the impedance synthesizer at the conclusion of the matching state search. An impedance synthesizer is responsive to the switch control signal for coupling a radio frequency signal and matching the impedance of an antenna to a signal source.

    摘要翻译： 闭环控制的天线调谐单元（ATU）系统包括一个回波损耗检测器，连接到采样信号源产生的RF信号以提供回波损耗信号。 连接匹配状态搜索电路以接收回波损耗信号，作为响应，选择性地存储回波损耗值和阻抗匹配状态。 连接中央控制器以提供开关控制信号，并且在匹配状态搜索结束时向阻抗合成器施加最佳匹配状态。 阻抗合成器响应于开关控制信号，用于耦合射频信号并将天线的阻抗与信号源匹配。

    FRONT END CIRCUIT
    66.
    发明申请
    FRONT END CIRCUIT 有权
    前端电路

    公开(公告)号：US20100026906A1

    公开(公告)日：2010-02-04

    申请号：US12521090

    申请日：2007-10-02

    申请人： Taiwa Okanobu

    发明人： Taiwa Okanobu

    IPC分类号： H04N5/50

    CPC分类号： H04N5/4446 ,  H03G3/3068 ,  H03J1/005 ,  H03J3/06 ,  H03J5/244 ,  H03J2200/10 ,  H04N5/50 ,  H04N5/52 ,  H04N21/4263 ,  H04N21/4305

    摘要： An IC of a front end circuit which can be ready for various television broadcasting systems is provided. The front end circuit includes tuning circuits 12A to 12C and 14A to 14C and high frequency amplifiers 13A to 13C individually corresponding to a plurality of reception bands of television broadcasts. The front end circuit further includes a switch circuit 11 for selectively supplying reception signals to the tuning circuits 12A to 12C, and a switch circuit 15 for selectively extracting outputs of the tuning circuits 14A to 14C. The front end circuit further includes mixer circuits 21I and 21Q to which an output of the switch circuit 15 is supplied, and a PLL 30 for supplying local oscillation signals SLOI and SLOQ having phases orthogonal to each other to the mixer circuits 21I and 21Q. The front end circuit further includes a complex band-pass filter 24 to which outputs of the mixer circuits 21I and 21Q are supplied, and an output circuit 25 for mathematically operating an output of the complex band-pass filter 24 and outputting an intermediate frequency signal SIF.

    摘要翻译： 提供了可以为各种电视广播系统准备的前端电路的IC。 前端电路包括分别对应于电视广播的多个接收频带的调谐电路12A至12C和14A至14C以及高频放大器13A至13C。 前端电路还包括用于向调谐电路12A至12C选择性地提供接收信号的开关电路11和用于选择性地提取调谐电路14A至14C的输出的开关电路15。 前端电路还包括提供开关电路15的输出的混频器电路21I和21Q以及用于向混频器电路21I和21Q提供彼此正交的相位的本地振荡信号SLOI和SLOQ的PLL30。 前端电路还包括混频电路21I和21Q的输出端提供的复合带通滤波器24和用于数学地操作复带通滤波器24的输出并输出中频信号的输出电路25 SIF。

    TUNER AND TRANSFORMER FORMED BY PRINTED CIRCUIT BOARD THEREOF
    67.
    发明申请
    TUNER AND TRANSFORMER FORMED BY PRINTED CIRCUIT BOARD THEREOF 有权
    其印刷电路板形成的调谐器和变压器

    公开(公告)号：US20090066448A1

    公开(公告)日：2009-03-12

    申请号：US11939716

    申请日：2007-11-14

    申请人： Wen-Po Ho ,  Shun-Chi Chuang

    发明人： Wen-Po Ho ,  Shun-Chi Chuang

    IPC分类号： H03J3/20 ,  H01F27/28 ,  H03H7/38

    CPC分类号： H03J3/20 ,  H03H7/38 ,  H03J3/06 ,  H03J3/185 ,  H03J3/24

    摘要： A tuner and a transformer formed by printed circuit board thereof are provided. The transformer includes a first winding and a second winding. In which, the first winding forms a first inductor and the second winding forms a second inductor. The transformer is formed by the first and the second inductors, wherein the first winding and the second winding are formed by conducting wires of a printed circuit board.

    摘要翻译： 提供了由其印刷电路板形成的调谐器和变压器。 变压器包括第一绕组和第二绕组。 其中，第一绕组形成第一电感器，第二绕组形成第二电感器。 变压器由第一和第二电感器形成，其中第一绕组和第二绕组由印刷电路板的导线形成。

    Television tuner which maintains UHF band tuning circuit bandwidth constant in low to high band range
    69.
    发明授权
    Television tuner which maintains UHF band tuning circuit bandwidth constant in low to high band range 失效
    电视调谐器，保持UHF频段调谐电路带宽在低到高频带范围内恒定

    公开(公告)号：US06933984B2

    公开(公告)日：2005-08-23

    申请号：US09995544

    申请日：2001-11-28

    申请人： Masaki Yamamoto ,  Akira Yamamoto

    发明人： Masaki Yamamoto ,  Akira Yamamoto

    IPC分类号： H03J3/06 ,  H04B1/18 ,  H04B1/26 ,  H04N5/44 ,  H04N5/50

    CPC分类号： H03J3/06

    摘要： A tuning circuit's bandwidth is maintained almost constant throughout a UHF low to high band range so as to prevent interference by a neighboring channel, particularly in receiving high band television signals, and also to improve NF in receiving low band television signals, eliminating a difference in NF between channels. To realize this, a UHF tuner comprises: a UHF tuning circuit which has a varactor diode first and second inductance elements serially interconnected and connected in parallel with the varactor diode, where the varactor diode 11a varies a tuning frequency within a prescribed frequency range in the UHF band; and impedance means which is serially inserted between an input terminal and the junction of the two inductance elements, where the impedance by the impedance means increases as a frequency increases within the prescribed frequency range in the UHF band.

    摘要翻译： 调谐电路的带宽在整个UHF低至高频带范围内几乎保持恒定，以防止相邻信道的干扰，特别是在接收高频电视信号时，也可以改善接收低频电视信号的NF，从而消除 通道之间的NF。 为了实现这一点，UHF调谐器包括：UHF调谐电路，其具有串联地互连并与变容二极管并联连接的变容二极管第一和第二电感元件，其中变容二极管11a在规定频率范围内改变调谐频率 UHF频带; 以及阻抗装置，其串联插入在两个电感元件的输入端子和结点之间，其中阻抗装置的阻抗随UHF频带中的规定频率范围内的频率增加而增加。

    Broadband integrated digitally tunable filters
    70.
    发明申请
    Broadband integrated digitally tunable filters 审中-公开
    宽带集成数字可调滤波器

    公开(公告)号：US20050040909A1

    公开(公告)日：2005-02-24

    申请号：US10644194

    申请日：2003-08-20

    申请人： Matthew Waight ,  Joel Birkeland

    发明人： Matthew Waight ,  Joel Birkeland

    IPC分类号： H03H7/01 ,  H03H7/12 ,  H03H7/40 ,  H03J1/00 ,  H03J3/06 ,  H03H7/00

    CPC分类号： H03H7/0153 ,  H03H7/12 ,  H03H7/1783 ,  H03J1/0008 ,  H03J3/06 ,  H03J2200/10

    摘要： A tunable receiver is disclosed including a plurality of select filters to perform an initial band selection, a variable-gain low noise amplifier (LNA) whose gain is controlled to prevent its output power level to exceed a predetermined power threshold, a plurality of digitally-tunable tracking filters to pass signals within a selected channel and to reject signals in a corresponding image band, a second LNA to further amplify the received RF signal and to generate differential signal outputs, a down converting stage which converts the received RF signal to an IF signal while rejecting signals in the image band, an IF trap to further reject undesired signals present at the output of the down converting stage, an IF amplifier to amplify the IF signal to compensate for losses, an IF filter to provide channel select and reject undesirable signals, and a variable-gain IF amplifier to amplify the IF signal and maintain its power level within specification.

    摘要翻译： 公开了一种可调谐接收机，包括执行初始频带选择的多个选择滤波器，其增益被控制以防止其输出功率电平超过预定功率阈值的可变增益低噪声放大器（LNA）;多个数字 - 可调谐跟踪滤波器以在所选择的信道内传递信号并拒绝相应图像频带中的信号，第二LNA进一步放大接收到的RF信号并产生差分信号输出;下变频级，将接收到的RF信号转换成IF 信号同时抑制图像频带中的信号，IF陷波器进一步消除存在于下变频级的输出端的不期望信号，IF放大器放大IF信号以补偿损耗，IF滤波器提供信道选择和拒绝 信号和可变增益IF放大器，以放大IF信号并将其功率水平保持在规格范围内。