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    Modulated on-die termination
    11.
    发明授权
    Modulated on-die termination 有权
    调制片上端接

    公开(公告)号：US09281816B2

    公开(公告)日：2016-03-08

    申请号：US14368772

    申请日：2012-12-22

    Applicant: Rambus Inc.

    Inventor： Amir Amirkhany ,  Farshid Aryanfar ,  Ravindranath Kollipara ,  Xingchao (Chuck) Yuan

    IPC: H03K19/00 ,  H03K19/0175 ,  H04L25/02 ,  G11C29/50 ,  G06F13/40

    CPC classification number: H03K19/0005 ,  G06F13/4086 ,  G11C29/50008 ,  H03K19/017545 ,  H04L25/0278

    Abstract: Alternating on-die termination impedances are applied within an integrated circuit device to up-convert signal reflections to higher frequencies that are attenuated by the signaling channel as the reflections propagate toward an intended signal receiver. Through this approach, the disruptive effect of reflected signals may be significantly reduced with relatively little overhead within the interconnected integrated circuit devices and little or no change to the printed circuit board or other interconnect medium. Changes to the printed circuit board or other interconnect medium can be made to further increase attenuation over the frequency band of the up-converted reflection and outside of the transmission band of signals of interest.

    Abstract translation: 在集成电路器件内施加交替的片上终端阻抗，以将信号反射上变频到由信号通道衰减的较高频率，因为反射向预期信号接收器传播。 通过这种方法，相互连接的集成电路器件内的相对较少的开销可以显着降低反射信号的破坏性影响，并且对印刷电路板或其它互连介质几乎没有或没有改变。 可以对印刷电路板或其它互连介质进行改变，以进一步增加在上变频反射的频带和感兴趣的信号的传输频带之外的衰减。

    HIGH-ACCURACY DETECTION IN COLLABORATIVE TRACKING SYSTEMS
    12.
    发明申请
    HIGH-ACCURACY DETECTION IN COLLABORATIVE TRACKING SYSTEMS 有权
    协同跟踪系统的高精度检测

    公开(公告)号：US20130162460A1

    公开(公告)日：2013-06-27

    申请号：US13726822

    申请日：2012-12-26

    Applicant: Rambus Inc.

    Inventor： Farshid Aryanfar ,  Jihong Ren

    IPC: G01S5/02

    CPC classification number: G01S5/0294 ,  A63F2300/204 ,  G01S13/767

    Abstract: An electronic device for wirelessly tracking the position of a second electronic device is disclosed. The electronic device includes transceiver circuitry and processing circuitry. The transceiver circuitry includes a beacon generator to generate a beacon at a particular frequency and direction. An antenna array transmits the beacon, and receives at least one modulated reflected beacon from the second electronic device. The transceiver circuitry also includes a discriminator to discriminate between received modulated reflected beacons and received reflected interfering beacons. The processing circuitry couples to the transceiver circuitry and tracks the position of the second device based on the modulated reflected beacons.

    Abstract translation: 公开了一种用于无线跟踪第二电子设备的位置的电子设备。 电子设备包括收发器电路和处理电路。 收发器电路包括用于在特定频率和方向上产生信标的信标发生器。 天线阵列发送信标，并从第二电子设备接收至少一个经调制的反射信标。 收发器电路还包括鉴别器以区分接收到的被调制反射信标和接收到的反射干涉信标。 处理电路耦合到收发器电路并且基于经调制的反射信标来跟踪第二设备的位置。

    INTEGRATED CIRCUIT COMPRISING FRACTIONAL CLOCK MULTIPLICATION CIRCUITRY
    15.
    发明申请
    INTEGRATED CIRCUIT COMPRISING FRACTIONAL CLOCK MULTIPLICATION CIRCUITRY 有权
    包含分时钟多路复用电路的集成电路

    公开(公告)号：US20140380082A1

    公开(公告)日：2014-12-25

    申请号：US14482782

    申请日：2014-09-10

    Applicant: Rambus Inc.

    Inventor： Masum Hossain ,  Farshid Aryanfar ,  Mohammad Hekmat ,  Reza Navid

    IPC: H03B19/00 ,  H03L7/099 ,  G06F1/08

    CPC classification number: H03B19/00 ,  G06F1/08 ,  G06F1/10 ,  H03K3/0315 ,  H03K5/00006 ,  H03L7/099

    Abstract: Circuitry capable of performing fractional clock multiplication by using an injection-locked oscillator is described. Some embodiments described herein perform fractional clock multiplication by periodically changing the injection location, from a set of injection locations, where the injection signal is injected and/or by periodically changing a phase, from a set of phases, of the injection signal that is injected into the ILO.

    Abstract translation: 描述能够通过使用注入锁定振荡器执行分数时钟倍增的电路。 本文描述的一些实施例通过周期性地改变喷射位置，从喷射信号的一组注入位置周期性地改变喷射位置，和/或通过周期性地改变注入的注入信号的相位相位来改变相位 进入国际劳工组织。

    Wide Range Frequency Synthesizer with Quadrature Generation and Spur Cancellation
    16.
    发明申请
    Wide Range Frequency Synthesizer with Quadrature Generation and Spur Cancellation 有权

    公开(公告)号：US20130271186A1

    公开(公告)日：2013-10-17

    申请号：US13830007

    申请日：2013-03-14

    Applicant: RAMBUS INC.

    Inventor： Masum Hossain ,  Farshid Aryanfar

    IPC: H03L7/23

    CPC classification number: H03L7/235 ,  H03L7/0805 ,  H03L7/081 ,  H03L7/099 ,  H03L7/0995 ,  H03L7/18 ,  H03L7/23

    Abstract: A frequency synthesizer generates a wide range of frequencies from a single oscillator while achieving good noise performance. A cascaded phase-locked loop (PLL) circuit includes a first PLL circuit with an LC voltage controlled oscillator (VCO) and a second PLL circuit with a ring VCO. A feedforward path from the first PLL circuit to the second PLL circuit provides means and signal path for cancellation of phase noise, thereby reducing or eliminating spur and quantization effects. The frequency synthesizer can directly generate in-phase and quadrature phase output signals. A split-tuned ring-based VCO is controlled via a phase error detection loop to reduce or eliminate phase error between the quadrature signals.

    Integrated circuit comprising fractional clock multiplication circuitry
    18.
    发明授权
    Integrated circuit comprising fractional clock multiplication circuitry 有权
    集成电路包括分数时钟乘法电路

    公开(公告)号：US09236834B2

    公开(公告)日：2016-01-12

    申请号：US14482782

    申请日：2014-09-10

    Applicant: Rambus Inc.

    Inventor： Masum Hossain ,  Farshid Aryanfar ,  Mohammad Hekmat ,  Reza Navid

    IPC: H03K3/03 ,  H03B19/00 ,  H03K5/00 ,  G06F1/08 ,  H03L7/099

    CPC classification number: H03B19/00 ,  G06F1/08 ,  G06F1/10 ,  H03K3/0315 ,  H03K5/00006 ,  H03L7/099

    Abstract: Circuitry capable of performing fractional clock multiplication by using an injection-locked oscillator is described. Some embodiments described herein perform fractional clock multiplication by periodically changing the injection location, from a set of injection locations, where the injection signal is injected and/or by periodically changing a phase, from a set of phases, of the injection signal that is injected into the ILO.

    Abstract translation: 描述能够通过使用注入锁定振荡器执行分数时钟倍增的电路。 本文描述的一些实施例通过周期性地改变喷射位置，从喷射信号的一组注入位置周期性地改变喷射位置，和/或通过周期性地改变注入的注入信号的相位相位来改变相位 进入国际劳工组织。

    Techniques for Phase Detection
    19.
    发明申请
    Techniques for Phase Detection 有权
    相位检测技术

    公开(公告)号：US20140340120A1

    公开(公告)日：2014-11-20

    申请号：US14452187

    申请日：2014-08-05

    Applicant: Rambus Inc.

    Inventor： Brian Leibowitz ,  Hae-Chang Lee ,  Farshid Aryanfar ,  Kun-Yung Chang ,  Jie Shen

    IPC: H03D13/00

    CPC classification number: H03D13/00 ,  H03L7/08 ,  H03L7/0814 ,  H03L7/0816 ,  H03L7/085

    Abstract: A phase detection circuit can include two phase detectors that each generate a non-zero output in response to input signals being aligned in phase. The input signals are based on two periodic signals. The phase detection circuit subtracts the output signal of one phase detector from the output signal of the other phase detector to generate a signal having a zero value when the periodic signals are in phase. Alternatively, a phase detector generates a phase comparison signal indicative of a phase difference between periodic signals. The phase comparison signal has a non-zero value in response to input signals to the phase detector being aligned in phase. The input signals are based on the periodic signals. An output circuit receives the phase comparison signal and generates an output having a zero value in response to the periodic signals being aligned in phase.

    Abstract translation: 相位检测电路可以包括两个相位检测器，每个相位检测器响应于同相对准的输入信号而产生非零输出。 输入信号基于两个周期信号。 相位检测电路从另一相位检测器的输出信号中减去一相位检测器的输出信号，当周期信号同相时产生具有零值的信号。 或者，相位检测器产生指示周期信号之间的相位差的相位比较信号。 相位比较信号响应于相位检测器的相位输入信号具有非零值。 输入信号基于周期信号。 输出电路接收相位比较信号，并响应于同相对齐的周期信号产生具有零值的输出。

    COMMUNICATION USING CONTINUOUS-PHASE MODULATED SIGNALS
    20.
    发明申请
    COMMUNICATION USING CONTINUOUS-PHASE MODULATED SIGNALS 有权
    使用连续相位调制信号的通信

    公开(公告)号：US20140307833A1

    公开(公告)日：2014-10-16

    申请号：US14101274

    申请日：2013-12-09

    Applicant: Rambus Inc.

    Inventor： Aliazam Abbasfar ,  Farshid Aryanfar

    IPC: H04L27/20

    CPC classification number: H04L27/22 ,  H04B1/16 ,  H04L27/2014 ,  H04L27/2082

    Abstract: Embodiments of a circuit are described. In this circuit, a modulation circuit provides a first modulated electrical signal and a second modulated electrical signal, where a given modulated electrical signal, which can be either the first modulated electrical signal or the second modulated electrical signal, includes minimum-shift keying (MSK) modulated data. Moreover, a first phase-adjustment element, which is coupled to the modulation circuit, sets a relative phase between the first modulated electrical signal and the second modulated electrical signal based on a phase value of the first phase-adjustment element. Additionally, an output interface, which is coupled to the first phase-adjustment element, is coupled to one or more antenna elements which output signals. These signals include a quadrature phase-shift-keying (QPSK) signal corresponding to the first modulated electrical signal and the second modulated electrical signal.

    Abstract translation: 描述电路的实施例。 在该电路中，调制电路提供第一调制电信号和第二调制电信号，其中可以是第一调制电信号或第二调制电信号的给定调制电信号包括最小位移键控（MSK ）调制数据。 此外，耦合到调制电路的第一相位调整元件基于第一相位调整元件的相位值来设定第一调制电信号和第二调制电信号之间的相对相位。 另外，耦合到第一相位调整元件的输出接口耦合到输出信号的一个或多个天线元件。 这些信号包括对应于第一调制电信号和第二调制电信号的正交相移键控（QPSK）信号。

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