利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

136 条记录 (耗时 0.076 秒)

    Optical down-converter using universal frequency translation technology
    9.
    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, system and apparatus for balanced frequency up-conversion of a baseband signal
    10.
    发明授权
    Method, system and apparatus for balanced frequency up-conversion of a baseband signal 有权
    用于基带信号平衡上变频的方法，系统和装置

    公开(公告)号：US08571135B2

    公开(公告)日：2013-10-29

    申请号：US13323550

    申请日：2011-12-12

    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： H04L27/04 ,  H04L27/12 ,  H04L27/20

    CPC分类号： H04B1/0475 ,  H03C3/40 ,  H03D3/006 ,  H03D7/00 ,  H04L25/03

    摘要： A balanced transmitter up-converts a baseband signal directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the baseband signal in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains the necessary information to reconstruct the baseband signal. The differential sampling is performed according to a first and second control signals that are phase shifted with respect to each other. In embodiments of the invention, the control signals have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal. A bandpass filter can then be utilized to select the desired harmonic of interest from the harmonically rich signal. The sampling modules that perform the sampling can be configured in either a series or a shunt configuration. In embodiments of the invention, DC offset voltages are minimized between the sampling modules to minimize or prevent carrier insertion into the harmonic images.

    摘要翻译： 平衡发射机直接从基带到RF RF转换基带信号。 上转换过程是足够的线性，即使在对频谱增长有严格要求的通信应用中也不需要IF处理。 在运行中，平衡调制器以平衡和差分的方式对基带信号进行子谐波采样，从而产生谐波丰富的信号。 谐波丰富的信号包含以抽样频率的倍数重复的多个谐波图像，其中每个谐波包含必要的信息以重构基带信号。 根据相对于彼此相移的第一和第二控制信号执行差分采样。 在本发明的实施例中，控制信号具有脉冲宽度（或孔径），其操作以改善在谐波丰富信号中的期望谐波的能量传递。 然后可以利用带通滤波器从谐波丰富的信号中选择所需要的谐波。 执行采样的采样模块可以以串联或分流配置进行配置。 在本发明的实施例中，采样模块之间的DC偏移电压最小化，以最小化或防止载波插入到谐波图像中。