METHODS AND APPARATUS FOR MULTI-MODE FREQUENCY SHIFT KEYING
    4.
    发明申请
    METHODS AND APPARATUS FOR MULTI-MODE FREQUENCY SHIFT KEYING 审中-公开
    多模式频移键控方法与装置

    公开(公告)号:US20080159438A1

    公开(公告)日:2008-07-03

    申请号:US11961987

    申请日:2007-12-20

    Abstract: Methods and apparatus for signal transmission utilizing directly modulated frequency shift keying. Embodiments of the present invention provide a fractional (non-integer) N oscillator to directly modulate a baseband signal for transmission using a programmable digital raised cosine generator, providing a tunable Gaussian FSK transmitter.

    Abstract translation: 利用直接调制频移键控的信号传输方法和装置。 本发明的实施例提供了一种分数(非整数)N个振荡器,用于使用可编程数字升余弦发生器直接调制用于传输的基带信号,从而提供可调高斯FSK发射机。

    Systems and methods for spread spectrum communication of supplemental information
    5.
    发明申请
    Systems and methods for spread spectrum communication of supplemental information 失效
    补充信息扩频通信的系统和方法

    公开(公告)号:US20050018756A1

    公开(公告)日:2005-01-27

    申请号:US10885908

    申请日:2004-07-07

    CPC classification number: H04H20/31 H04B1/707 H04B2201/70715 H04N7/08

    Abstract: Systems and methods for the communication and recovery of supplementary data encoded in the primary information transmitted from a source to a receiver for both audio and television transmissions. The method includes modulating a carrier signal with the supplementary data using a spread spectrum approach and demodulating the carrier signal to recover the embedded supplementary data.

    Abstract translation: 用于通信和恢复在从音频和电视传输的源发送到接收机的主要信息中编码的补充数据的系统和方法。 该方法包括使用扩展频谱方法利用补充数据调制载波信号,并解调载波信号以恢复嵌入的补充数据。

    Planar inductors and method of manufacturing thereof
    10.
    发明申请
    Planar inductors and method of manufacturing thereof 失效
    平面电感器及其制造方法

    公开(公告)号:US20030011458A1

    公开(公告)日:2003-01-16

    申请号:US09904014

    申请日:2001-07-12

    Abstract: A printed circuit board has two layers of printed circuit board dielectric material; a core made of ferromagnetic material between the two layers; and conductive leads on the opposite side of each dielectric layer from the core connected by via holes through both dielectric layers to form a conducting coil around the core. The conductive leads can form two separate coils around the core to form a transformer. A planar conducing sheet can be placed on or between one or more of the printed circuit board's dielectric layers to shield other circuitry on the printed circuit board from magnetic fields generated around the core. The core can be formed at least in part by electroless plating. Electroplating can be used to add a thicker layer of less conductive ferromagnetic material. Ferromagnetic inductive cores can be formed on the surface of a dielectric material by: dipping the surface of the dielectric in a solution containing catalytic metal particles having a slight dipole; and placing the dielectric in a metal salt to cause a layer containing metal to be electrolessly plated upon the dielectric. Plasma etching or other technique can be used before the dipping process to roughen the dielectric's surface to help attract the catalytic particles. This method can be used to form an inductor core on or between one or more dielectric layers of a printed circuit board, of a multichip module, of an integrated circuit, or of a micro-electromechanical device.

    Abstract translation: 印刷电路板具有两层印刷电路板电介质材料; 由两层之间的铁磁材料制成的铁芯; 并且每个电介质层的相对侧上的导电引线与通过两个电介质层的通孔连接的芯体形成围绕芯的导电线圈。 导电引线可以在芯周围形成两个分离的线圈以形成变压器。 平面导电片可以放置在印刷电路板的介电层中的一个或多个之上或之上,以屏蔽印刷电路板上的其它电路与芯周围产生的磁场。 芯可以至少部分地通过无电镀形成。 可以使用电镀来增加较薄的较不导电的铁磁材料层。 可以通过以下步骤在电介质材料的表面上形成铁磁感应芯:将电介质的表面浸入含有具有轻微偶极子的催化金属颗粒的溶液中; 并将电介质放置在金属盐中以使含有金属的层无电镀在电介质上。 在浸渍过程之前可以使用等离子体蚀刻或其它技术来粗糙化电介质的表面以帮助吸引催化剂颗粒。 该方法可以用于在印刷电路板,多芯片模块,集成电路或微机电装置的一个或多个电介质层之间或之上形成电感器芯。

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