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    • 42. 发明申请
    • Variable resistance circuit
    • 可变电阻电路
    • US20060028287A1
    • 2006-02-09
    • US11246469
    • 2005-10-07
    • William ThompsonJohn PorterLarren Weber
    • William ThompsonJohn PorterLarren Weber
    • H03H7/38
    • G11C7/1051G11C7/1069H03H7/40H03H11/245H03H11/28H03H17/0263
    • A method of finding an unknown value from within a range of values is disclosed that divides the range into weighted subranges and then, beginning with an arbitrary search value within the range, performs a number of simple comparisons to determine the value for each subrange that will result in a match with the target value. This method can also detect those cases where the target value lies outside the range. In one embodiment, the method of finding an unknown value within a range of values is applied to impedance matching. In this embodiment, the output impedance of a pin on an integrated circuit is automatically matched to the impedance of the load connected to it. The output driver has a controllable impedance that can be adjusted within a specific range of impedances to match the external load impedance it is to drive.
    • 公开了一种从值范围内发现未知值的方法,其将范围划分为加权子范围,然后从该范围内的任意搜索值开始执行多个简单比较,以确定每个子范围的值, 导致与目标值匹配。 该方法还可以检测目标值在范围之外的情况。 在一个实施例中,将在值范围内找到未知值的方法应用于阻抗匹配。 在本实施例中,集成电路上的引脚的输出阻抗与连接到其的负载的阻抗自动匹配。 输出驱动器具有可控阻抗,可以在特定阻抗范围内进行调节,以匹配驱动的外部负载阻抗。
    • 44. 发明申请
    • Optical add/drop multiplexer having a banded channel configuration
    • 具有带通道配置的光分插复用器
    • US20050281557A1
    • 2005-12-22
    • US10869663
    • 2004-06-16
    • Daniel FishmanXiang LiuVincent SilverioWilliam ThompsonJinpin Ying
    • Daniel FishmanXiang LiuVincent SilverioWilliam ThompsonJinpin Ying
    • G02B6/34H04J14/02H04J14/00
    • H04J14/0221H04J14/0204H04J14/0205H04J14/0208H04J14/0213H04J14/0219
    • An optical add/drop multiplexer (OADM) adapted to route optical signals having at least two different bit rates. The OADM has at least two sets of DWDM channels, e.g., with channels in a first set having a first bandwidth value suitable for the transmission of 10-Gb/s signals and channels in a second set having a second bandwidth value suitable for the transmission of 40-Gb/s signals. The first and second sets occupy two different spectral bands and the first set has two subsets of interleaved channels. In one embodiment, the OADM has first and second optical branches adapted to process optical signals corresponding to first and second groups of channels, respectively. The first group includes a first subset from the first set while the second group includes the second set and a second subset from the first set. Advantageously, OADMs of the invention may be used to create independent processing paths for different groups of channels. As a result, a communication system having those OADMs can be upgraded, e.g., to add a new 40-Gb/s service and/or to populate additional 10-Gb/s channels substantially without interrupting the 10-Gb/s service already in place.
    • 适于路由具有至少两个不同比特率的光信号的光分插复用器(OADM)。 OADM具有至少两组DWDM信道,例如,第一组中的信道具有适合于传输10Gb / s信号的第一带宽值,以及具有适合于传输的第二带宽值的第二组中的信道 的40 Gb / s信号。 第一组和第二组占用两个不同的频谱带,第一组具有两个交织信道子集。 在一个实施例中,OADM具有分别适于处理对应于第一和第二组信道的光信号的第一和第二光分支。 第一组包括来自第一组的第一子集,而第二组包括第二组,第二组包括第一组。 有利地,本发明的OADM可以用于为不同的信道组创建独立的处理路径。 因此,可以升级具有这些OADM的通信系统,例如,为了增加新的40Gb / s服务和/或基本上添加10Gb / s信道,而不会中断10Gb / s的服务 地点。
    • 46. 发明申请
    • Automated system and method for optical measurement and testing
    • 用于光学测量和测试的自动化系统和方法
    • US20050185955A1
    • 2005-08-25
    • US11098711
    • 2005-04-04
    • John FrenchWilliam Thompson
    • John FrenchWilliam Thompson
    • G01N21/00H04B10/08
    • H04B10/07
    • A system and method for bit error rate testing optical components comprises providing an optical testing unit, which measures a bit error rate of an optical device under test (DUT) over an operating range of the DUT. The optical testing unit includes an optical transmitter, which transmits an optical test signal that is transmitted to the DUT; an optical receiver, which receives an input signal from the DUT; a graphical user interface, which provides an interface with a user; and a controller, selectively coupled to the transmitter, the receiver and the graphical user interface, wherein the controller provides a central control of the transmitter, the receiver and the graphical user interface.
    • 用于误码率测试光学部件的系统和方法包括提供一个光学测试单元,该测试单元测量在DUT的工作范围上的被测光学器件(DUT)的误码率。 光学测试单元包括光发射机,其发送传输到DUT的光学测试信号; 光接收器,其接收来自DUT的输入信号; 图形用户界面,其提供与用户的接口; 以及选择性地耦合到发射机,接收机和图形用户界面的控制器,其中控制器提供发射机,接收机和图形用户界面的中央控制。