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    Transition-based, nonlinear equalization for optical transmission
    1.
    发明授权
    Transition-based, nonlinear equalization for optical transmission 有权

    公开(公告)号：US11581949B1

    公开(公告)日：2023-02-14

    申请号：US17461407

    申请日：2021-08-30

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Ronaldo Sanchez ,  Gilbert Yoh ,  Zhubiao Zhu ,  Daniel Alan Berkram

    IPC: H04B10/00 ,  H04B10/58 ,  H04B10/2543

    Abstract: An optical or an optoelectronic device and methods are provided for data transmission across two interconnects. First, an electrical signal is obtained from an interconnect. Next, the electrical signal is modulated. Within the modulated electrical signal, an occurrence of a transition is determined, in which a change in a power of the electrical signal by more than a threshold amount. In response to the determination of the occurrence of the transition, coefficients indicative of respective amounts of compensation to resolve or mitigate nonlinearities associated with the transition are determined. According to the coefficients, a filter is applied in a vicinity of the transition to obtain a modified electrical signal. The modified electrical signal is converted into an optical signal and coupled to a fiber to transmit the optical signal to a destination at a second interconnect.

    DRIVER ASSISTED BY CHARGE SHARING
    3.
    发明申请
    DRIVER ASSISTED BY CHARGE SHARING 审中-公开

    公开(公告)号：US20190334617A1

    公开(公告)日：2019-10-31

    申请号：US15965773

    申请日：2018-04-27

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Zhubiao Zhu ,  Clinton Harold Parker ,  Daniel Alan Berkram

    IPC: H04B10/079 ,  H04B10/50 ,  H04B10/58 ,  H04L25/03

    Abstract: A device, including a switch configured to couple a current source with an output terminal upon receipt of a data signal, is provided. The device also includes a first variable capacitor coupled in parallel to the current source at a common node on a source terminal of the switch, wherein the first variable capacitor comprises multiple capacitive elements coupled in parallel and configured to be activated by a programmable signal, and wherein the programmable signal is selected to increase a charge transfer rate from an output terminal coupled to a load, when the switch is turned on. A system and a serial interface including the above device are also provided.

    Termination voltage circuits
    4.
    发明授权
    Termination voltage circuits 有权

    公开(公告)号：US10153611B2

    公开(公告)日：2018-12-11

    申请号：US15500081

    申请日：2015-04-09

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Dacheng Zhou ,  Daniel Alan Berkram ,  Zhubiao Zhu

    IPC: H01S5/042 ,  H03K19/0185 ,  H01S5/183 ,  H03K19/00

    Abstract: An example driver circuit includes a termination voltage circuit and a termination element coupled to the termination voltage circuit. The driver circuit also includes a current source switch coupled the termination element via a node. The driver circuit further includes a current source coupled to the current source switch. The current source switch and the termination voltage circuit are controlled via a control signal. The termination voltage circuit is to generate a termination voltage to match a node voltage of the node based on the control signal. The driver circuit further includes a load coupled to the termination element and the current source switch via the node. The driver circuit further includes a load voltage source coupled to the load. The node voltage is generated based on the load and the load voltage source.

    CURRENT SUPPLY FOR AN OPTO-ELECTRONIC DEVICE
    5.
    发明申请
    CURRENT SUPPLY FOR AN OPTO-ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20190334742A1

    公开(公告)日：2019-10-31

    申请号：US15965760

    申请日：2018-04-27

    Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

    Inventor： Clinton Harold Parker ,  Zhubiao Zhu ,  Daniel Alan Berkram

    IPC: H04L25/02 ,  H03K17/06 ,  H03K17/687

    Abstract: A device, including a first current supply configured to provide a bias current to a load and a main current supply having a source terminal coupled in parallel with the load and configured to reduce a current value to the load below the bias current, is provided. The device includes a termination resistor coupled in series with the source terminal of the main current supply and configured to receive current from the source terminal of the main current supply when the source terminal of the main current supply is activated. The device also includes an auxiliary current supply having a sink terminal coupled to the termination resistor at a common node, and configured to maintain the common node at common mode voltage when current flows from the source terminal of the main current supply to the sink terminal of the auxiliary current supply and through the termination resistor.

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