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    Optical down-converter using universal frequency translation technology
    1.
    发明授权
    Optical down-converter using universal frequency translation technology 有权
    光学下变频器采用通用频率转换技术

    公开(公告)号：US07321735B1

    公开(公告)日：2008-01-22

    申请号：US09567977

    申请日：2000-05-10

    申请人： Francis J. Smith ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins ,  Robert T. Short ,  David F. Sorrells ,  Danny E. Stoneking

    发明人： Francis J. Smith ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins ,  Robert T. Short ,  David F. Sorrells ,  Danny E. Stoneking

    IPC分类号： H04B10/06

    CPC分类号： H03D7/00

    摘要： A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated with information. The method converts an optical signal to electrical charge, accumulates the electrical charge, and periodically transfers the accumulated electrical charge to a storage device, whereby the periodically transferred electrical charge forms the electrical signals. An exemplary system includes an optical transducer and a universal frequency translator coupled to an output of the optical transducer. The optical transducer receives an optical signal and converts the optical signal to electrical charge. The universal frequency translator periodically transfers energy from the electrical charge and forms the electrical signals from the transferred energy. In an embodiment, the present invention converts an I and Q optical signal to electrical signals. In an embodiment, the present invention converts an optical signal to an RF electrical signal using relatively few components, while preserving information content.

    摘要翻译： 一种用于将光信号转换为电信息信号的方法和系统，包括解调的基带信息信号和多个谐波的调制的基带信号。 在一个实施例中，光信息信号用信息进行幅度调制。 该方法将光信号转换为电荷，累积电荷，并将累积的电荷周期性地传送到存储装置，由此周期性转移的电荷形成电信号。 示例性系统包括光学换能器和耦合到光学换能器的输出的通用频率转换器。 光学传感器接收光信号并将光信号转换成电荷。 通用频率转换器周期性地从电荷传输能量，并从传送的能量形成电信号。 在一个实施例中，本发明将I和Q光信号转换成电信号。 在一个实施例中，本发明使用相对较少的组件将光信号转换成RF电信号，同时保留信息内容。

    Method and system for down-converting an electromagnetic signal, and transforms for same
    10.
    发明授权
    Method and system for down-converting an electromagnetic signal, and transforms for same 有权
    用于下变频电磁信号的方法和系统，并对其进行转换

    公开(公告)号：US08223898B2

    公开(公告)日：2012-07-17

    申请号：US12776173

    申请日：2010-05-07

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H03D7/00

    摘要： Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.

    摘要翻译： 本文描述了用于电磁（EM）信号的下变频的方法，系统和装置，以及其组合和子组合。 简言之，在实施例中，本发明通过接收EM信号并且在载波信号的近似半周期（½，1½，2½等）上递归地操作）来操作。 可以以载波信号的次谐波速率执行递归运算。 本发明积累了递归运算的结果，并使用累加结果形成降频转换信号。 在一个实施例中，EM信号被下变频到中频（IF）信号。 在另一个实施例中，EM信号被下变频为基带信息信号。 在另一个实施例中，EM信号是频率调制（FM）信号，其被下变频成非FM信号，例如相位调制（PM）信号或幅度调制（AM）信号。