Correction of Low Accuracy Clock
    31.
    发明申请
    Correction of Low Accuracy Clock 有权
    校正低精度时钟

    公开(公告)号:US20120306580A1

    公开(公告)日:2012-12-06

    申请号:US13484405

    申请日:2012-05-31

    Applicant: Andrew ELLIS

    Inventor: Andrew ELLIS

    CPC classification number: G04G3/027 G04G3/04

    Abstract: An electronic device has two oscillators, for example a first highly accurate crystal oscillator and a second less accurate low power oscillator. In a normal mode of operation, time is counted based on an output from the crystal oscillator, but in a low power mode of operation, time is counted based on an output from the less accurate oscillator. During the low power mode of operation, a calibration process is performed repeatedly. During a first calibration time period the second oscillator is calibrated against the first oscillator to obtain a first calibration result, and a recalibration is performed during a second calibration time period to obtain a second calibration result. A correction factor is determined from the first and second calibration results, and the correction factor is applied when subsequently counting time based on the output from the second oscillator.

    Abstract translation: 电子设备具有两个振荡器,例如第一高精度晶体振荡器和第二较不精确的低功率振荡器。 在正常工作模式下,时间根据晶体振荡器的输出进行计数,但在低功耗工作模式下,时间是根据较不精确的振荡器的输出进行计数的。 在低功率运行模式下,重复执行校准过程。 在第一校准时间段期间,第二振荡器针对第一振荡器进行校准以获得第一校准结果,并且在第二校准时间段期间执行重新校准以获得第二校准结果。 根据第一和第二校准结果确定校正因子,并且当基于来自第二振荡器的输出的后续计数时间时应用校正因子。

    COHERENT OPTICAL RECEIVER SYSTEM AND METHOD FOR DETECTING PHASE MODULATED SIGNALS
    32.
    发明申请
    COHERENT OPTICAL RECEIVER SYSTEM AND METHOD FOR DETECTING PHASE MODULATED SIGNALS 审中-公开
    相关光接收机系统和检测相位调制信号的方法

    公开(公告)号:US20110150504A1

    公开(公告)日:2011-06-23

    申请号:US12959169

    申请日:2010-12-02

    CPC classification number: H04B10/63 H04B10/60 H04B10/613

    Abstract: One aspect of the invention is a homodyne coherent receiver, suitable for high speed phase shift keying (PSK), the receiver comprising a receiver for receiving an incoming signal having a carrier-less modulation format, a signal conditioning sub-system that generates a carrier component from the incoming signal, and an optical injection phase locked loop (OIPLL) that phase locks the generated carrier component of the incoming signal. Embodiments of the invention may enable DSP free detection of optical PSK signals, which may be required in next generation fiber transmission systems and in optical constellation analyzer systems. In addition, embodiments of the invention may provide improved receiver sensitivity performance comparing to prior art systems using direct detection schemes. Also, embodiments of the invention may be advantageous in terms of cost and energy efficiency.

    Abstract translation: 本发明的一个方面是适用于高速相移键控(PSK)的零差相干接收机,该接收机包括用于接收具有无载波调制格式的输入信号的接收机,产生载波的信号调节子系统 来自输入信号的分量,以及相位锁定输入信号的所生成的载波分量的光注入锁相环(OIPLL)。 本发明的实施例可以实现对光PSK信号的DSP免费检测,这在下一代光纤传输系统和光学星座分析仪系统中可能是需要的。 此外,与使用直接检测方案的现有技术系统相比,本发明的实施例可以提供改进的接收机灵敏度性能。 此外,本发明的实施例在成本和能量效率方面可能是有利的。

    High efficiency linear microwave power amplifier
    33.
    发明授权
    High efficiency linear microwave power amplifier 有权
    高效线性微波功率放大器

    公开(公告)号:US07852153B1

    公开(公告)日:2010-12-14

    申请号:US12257948

    申请日:2008-10-24

    Abstract: A post-distortion method for cascading amplifier stages in a two-stage microwave power amplifier and a dynamic biasing method using back-end processing for correcting nonlinearity in the power amplifier output. A first or driver stage biased in a near-A region with low distortion is cascaded with a second or power stage biased in a near-C region with high efficiency. The amplitude and phase responses of the two stages compensate another to yield a more linear overall gain for the overall power amplifier. The dynamic biasing scheme modulates the source to drain voltages of the transistors used in the amplifier stages based on the harmonics in amplifier output in order to minimize the harmonics and correct non-linearity in the output.

    Abstract translation: 用于两级微波功率放大器级联放大器级的后失真方法和使用后端处理来校正功率放大器输出中的非线性的动态偏置方法。 偏置在具有低失真的近A区域中的第一或者驱动级与以C效率高的偏置在近C区域的第二或功率级级联。 两级的振幅和相位响应补偿另一个,以产生整个功率放大器的更线性的总增益。 动态偏置方案基于放大器输出中的谐波将源极放大到放大器级中使用的晶体管的漏极电压,以便最小化谐波和校正输出中的非线性。

    OPTICAL COMMUNICATION SYSTEM
    34.
    发明申请
    OPTICAL COMMUNICATION SYSTEM 审中-公开
    光通信系统

    公开(公告)号:US20100111543A1

    公开(公告)日:2010-05-06

    申请号:US12531048

    申请日:2008-03-13

    CPC classification number: H04B10/2587

    Abstract: An optical transmitter is of the reflective modulation type and has a means of generating reflection, a mixer for mixing a data stream and a sub-carrier, and an optical modulator for modulating an optical carrier with the output from the mixer in order to avoid optical beat-interference noise arising from, for example, Rayleigh backscattering. The modulator is in one embodiment of the interferometric type such as a Mach-Zehnder Modulator (MZM) operated to suppress the optical carrier at the transmitter output in order to reduce optical beat interference noise. The modulator preferably implements CSS-AMPSK modulation, which suppresses optical beat noise and achieves strong dispersion tolerance, enabling, for example, 10 Gb/s data transmission over 100 km distance without dispersion compensation. The transmitter may have a duobinary encoder, which encodes the data prior to mixing with the sub-carrier.

    Abstract translation: 光发射机具有反射调制型,具有产生反射的装置,用于混合数据流和副载波的混频器以及用于利用混频器的输出调制光载波的光调制器,以避免光 例如由瑞利后向散射引起的干扰噪声。 在诸如Mach-Zehnder调制器(MZM)的干涉式的一个实施例中,调制器被操作以抑制发射机输出处的光载波,以便减少光拍干扰噪声。 调制器优选地实现CSS-AMPSK调制,其抑制光学差拍噪声并且实现强的色散容限,使得能够例如在100km距离上进行10Gb / s的数据传输而没有色散补偿。 发射机可以具有双二进制编码器,其在与子载波混合之前对数据进行编码。

    High efficiency linear microwave power amplifier
    36.
    发明授权
    High efficiency linear microwave power amplifier 有权
    高效线性微波功率放大器

    公开(公告)号:US07477102B1

    公开(公告)日:2009-01-13

    申请号:US11485037

    申请日:2006-07-11

    Abstract: A post-distortion method for cascading amplifier stages in a two-stage microwave power amplifier and a dynamic biasing method using back-end processing for correcting nonlinearity in the power amplifier output. A first or driver stage biased in a near-A region with low distortion is cascaded with a second or power stage biased in a near-C region with high efficiency. The amplitude and phase responses of the two stages compensate another to yield a more linear overall gain for the overall power amplifier. The dynamic biasing scheme modulates the source to drain voltages of the transistors used in the amplifier stages based on the harmonics in amplifier output in order to minimize the harmonics and correct non-linearity in the output.

    Abstract translation: 用于两级微波功率放大器级联放大器级的后失真方法和使用后端处理来校正功率放大器输出中的非线性的动态偏置方法。 偏置在具有低失真的近A区域中的第一或者驱动级与以C效率高的偏置在近C区域的第二或功率级级联。 两级的振幅和相位响应补偿另一个,以产生整个功率放大器的更线性的总增益。 动态偏置方案基于放大器输出中的谐波将源极放大到放大器级中使用的晶体管的漏极电压,以便最小化谐波和校正输出中的非线性。

    Apparatus and Method to Store, Retrieve, and Search Information
    37.
    发明申请
    Apparatus and Method to Store, Retrieve, and Search Information 失效
    存储,检索和搜索信息的设备和方法

    公开(公告)号:US20080071980A1

    公开(公告)日:2008-03-20

    申请号:US11532486

    申请日:2006-09-15

    CPC classification number: G11B7/0065 Y10S707/99936

    Abstract: A method to store, retrieve, and search information is disclosed. The method encodes information comprising a plurality of datasets in a holographic data storage medium to form an encoded holographic data storage medium, and encodes that same information to one or more of a plurality of non-holographic data storage media. The method then selects a dataset comprising a portion of the information, where that dataset is written to a dataset storage address on the non-holographic data storage medium, and illuminates the encoded holographic data storage medium with a dataset beam comprising that dataset to produce a dataset reference beam, such that the dataset reference beam strikes the optical detector at one or more dataset reference beam coordinates. The method then associates the dataset with the one or more dataset reference beam coordinates and with the dataset storage address.

    Abstract translation: 公开了一种存储,检索和搜索信息的方法。 该方法对包含全息数据存储介质中的多个数据集的信息进行编码,以形成编码的全息数据存储介质,并将相同的信息编码为多个非全息数据存储介质中的一个或多个。 该方法然后选择包括信息的一部分的数据集,其中将该数据集写入非全息数据存储介质上的数据集存储地址,并用包含该数据集的数据集束照亮编码的全息数据存储介质,以产生 数据集参考光束,使得数据集参考光束在一个或多个数据集参考光束坐标处撞击光学检测器。 该方法然后将数据集与一个或多个数据集参考波束坐标和数据集存储地址相关联。

    Harmonic termination circuit for medium bandwidth microwave power amplifiers
    38.
    发明授权
    Harmonic termination circuit for medium bandwidth microwave power amplifiers 有权
    用于中等带宽微波功率放大器的谐波终端电路

    公开(公告)号:US07215221B1

    公开(公告)日:2007-05-08

    申请号:US10929619

    申请日:2004-08-30

    CPC classification number: H01P5/12 H03F3/604

    Abstract: A compact amplifier output bias circuit is used as a broadband harmonic termination. The bias circuit is adapted as a harmonic termination circuit to produce an effective low impedance or act as a load at the signal harmonic frequencies while having the capability of supplying DC power to the amplifier stage, optionally, if needed. A pi network is coupled to an active device output and provides a low impedance at frequency bands above a frequency band of operation while allowing DC bias to be appliable to the active device output.

    Abstract translation: 使用紧凑型放大器输出偏置电路作为宽带谐波终端。 偏置电路适合作为谐波终端电路,以产生有效的低阻抗或充当信号谐波频率处的负载,同时具有向放大器级提供直流电力的能力,可选地,如果需要的话。 pi网络耦合到有源器件输出,并且在高于操作频带的频带处提供低阻抗,同时允许DC偏压可应用于有源器件输出。

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