利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

169 条记录 (耗时 0.023 秒)

    Francis l
    31.
    发明授权
    Francis l 失效

    公开(公告)号：US1571900A

    公开(公告)日：1926-02-02

    申请号：US1571900D

    IPC分类号： H03J3/06

    CPC分类号： H03J3/06

    Method and apparatus to adjust a tunable reactive element
    35.
    发明授权
    Method and apparatus to adjust a tunable reactive element 有权
    调整可调电抗元件的方法和装置

    公开(公告)号：US08260213B2

    公开(公告)日：2012-09-04

    申请号：US12560115

    申请日：2009-09-15

    申请人： Shamsuddin H. Chasmawala ,  Matthew R. Greene

    发明人： Shamsuddin H. Chasmawala ,  Matthew R. Greene

    IPC分类号： H04B1/40 ,  H04B1/04 ,  H04B1/16 ,  H04B1/18 ,  H01Q11/12

    CPC分类号： H03J3/06

    摘要： A system that incorporates teachings of the present disclosure may include, for example, a method involving a step to tune a plurality of tunable reactive elements by measuring a drift in reactance of at least one of the plurality of tunable reactive elements away from a desired reactance. Additional embodiments are disclosed.

    摘要翻译： 结合本公开的教导的系统可以包括例如涉及通过测量多个可调谐无功元件中的至少一个远离期望电抗的电抗的漂移来调谐多个可调谐无功元件的步骤的方法 。 公开了另外的实施例。

    Front end circuit
    36.
    发明授权
    Front end circuit 有权
    前端电路

    公开(公告)号：US08208076B2

    公开(公告)日：2012-06-26

    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。

    Programmable baseband filters supporting auto-calibration for a mobile digital cellular television environment
    37.
    发明授权
    Programmable baseband filters supporting auto-calibration for a mobile digital cellular television environment 有权
    可编程基带滤波器支持移动数字蜂窝电视环境的自动校准

    公开(公告)号：US08175563B2

    公开(公告)日：2012-05-08

    申请号：US12611691

    申请日：2009-11-03

    申请人： Spyridon Charalabos Kavadias

    发明人： Spyridon Charalabos Kavadias

    IPC分类号： H04B1/28

    CPC分类号： H04B1/28 ,  H03J3/06 ,  H04B1/1036 ,  H04H20/57 ,  H04H40/27

    摘要： A method for processing wireless information is disclosed and may include performing by one or more circuits within a single-chip multi-band RF receiver, the one or more circuits comprising a filter, generating at least one control signal based on a signal strength of a baseband frequency signal generated by the one or more circuits within the single-chip multi-band RF receiver. A bandwidth of the filter may be adjusted using the generated at least one control signal. The generated baseband frequency signal may be filtered utilizing the bandwidth adjusted filter. A frequency response signal of the filter may be determined using a reference frequency signal. An attenuated reference frequency signal may be generated by attenuating the reference frequency signal. The attenuated reference frequency signal may be compared with the frequency response signal. The at least one control signal may be generated based on the comparison.

    摘要翻译： 公开了一种用于处理无线信息的方法，并且可以包括由单芯片多频带RF接收机内的一个或多个电路执行，所述一个或多个电路包括滤波器，基于信号强度产生至少一个控制信号 基带频率信号由单片多频RF接收机内的一个或多个电路产生。 可以使用所生成的至少一个控制信号来调整滤波器的带宽。 可以利用带宽调整滤波器对生成的基带频率信号进行滤波。 可以使用参考频率信号来确定滤波器的频率响应信号。 可以通过衰减参考频率信号来产生衰减的参考频率信号。 衰减的参考频率信号可以与频率响应信号进行比较。 可以基于比较来生成至少一个控制信号。

    METHOD AND APPARATUS TO ADJUST A TUNABLE REACTIVE ELEMENT
    39.
    发明申请
    METHOD AND APPARATUS TO ADJUST A TUNABLE REACTIVE ELEMENT 有权
    调整可逆反应元件的方法和装置

    公开(公告)号：US20100069029A1

    公开(公告)日：2010-03-18

    申请号：US12560115

    申请日：2009-09-15

    申请人： Shamsuddin H. Chasmawala ,  Matthew R. Greene

    发明人： Shamsuddin H. Chasmawala ,  Matthew R. Greene

    IPC分类号： H04B1/16

    CPC分类号： H03J3/06

    摘要： A system that incorporates teachings of the present disclosure may include, for example, a method involving a step to tune a plurality of tunable reactive elements by measuring a drift in reactance of at least one of the plurality of tunable reactive elements away from a desired reactance. Additional embodiments are disclosed.

    摘要翻译： 结合本公开的教导的系统可以包括例如涉及通过测量多个可调谐无功元件中的至少一个远离期望电抗的电抗的漂移来调谐多个可调谐无功元件的步骤的方法 。 公开了另外的实施例。

    TWO STAGE SURGE PROTECTION FOR SINGLE WIRE MULTI SWITCH TRANSCEIVER
    40.
    发明申请
    TWO STAGE SURGE PROTECTION FOR SINGLE WIRE MULTI SWITCH TRANSCEIVER 审中-公开
    用于单线多开关收发器的两级浪涌保护

    公开(公告)号：US20100053836A1

    公开(公告)日：2010-03-04

    申请号：US12450415

    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： H02H9/04

    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： An architecture for protecting circuitry used for signal communications between a frequency translation module (20) and a decoder (60) from transient voltage surges. According to an exemplary embodiment, the apparatus comprises a first signal path between a transmission line and a first reference potential, comprising a high impedance negative surge path; and a second signal path between the transmission line and the first reference potential, comprising a high impedance positive surge path, a low inductance surge path and a DC blocker circuit, wherein said high impedance positive surge path is configured in series with said low inductance surge path and said DC blocker circuit, wherein each of said low inductance surge path and said DC blocker circuit are coupled between said high impedance positive surge path and said source of reference potential.

    摘要翻译： 一种用于保护用于频率转换模块（20）和解码器（60）之间的信号通信的电路与瞬态电压浪涌的架构。 根据示例性实施例，该装置包括传输线和第一参考电位之间的第一信号路径，包括高阻抗负浪涌路径; 以及传输线和第一参考电位之间的第二信号路径，包括高阻抗正浪涌路径，低电感浪涌路径和DC阻断电路，其中所述高阻抗正浪涌路径被配置为与所述低电感浪涌串联 路径和所述DC阻断电路，其中所述低电感浪涌路径和所述DC阻断电路中的每一个耦合在所述高阻抗正浪涌路径和所述参考电位源之间。