公开(公告)号：US20190149244A1

公开(公告)日：2019-05-16

申请号：US16231159

申请日：2018-12-21

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Cheng Li ,  Di Liang ,  Kehan Zhu

IPC: H04B10/564 ,  H04L25/03 ,  H04L25/02 ,  H04B10/58 ,  H04B10/54 ,  H04L27/01 ,  H04B10/80 ,  H04B10/50

CPC classification number: H04B10/564 ,  H04B10/504 ,  H04B10/541 ,  H04B10/58 ,  H04B10/801 ,  H04L25/028 ,  H04L25/03885 ,  H04L27/01

Abstract: Examples disclosed herein relate to optical driver circuits. In some of the disclosed examples, an optical driver circuit includes a pre-driver circuit and a main driver circuit. The pre-driver circuit may include a pattern generator and at least one serializer to generate a main modulation signal and an inverted delayed modulation signal. The main driver circuit may include a level controller to control amplitudes of pre-emphasis on rising and falling edges of a modulation signal output and an equalization controller to transition the modulation signal output from the pre-emphasis amplitudes to main modulation amplitudes using the inverted delayed modulation signal.

公开(公告)号：US20190068292A1

公开(公告)日：2019-02-28

申请号：US15768975

申请日：2015-10-29

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Kehan Zhu ,  Cheng Li ,  Marco Florentino

IPC: H04B10/69 ,  H04B10/25 ,  H04L25/49

CPC classification number: H04B10/6931 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/693 ,  H04L25/4917

Abstract: One example of a receiver includes a first stage, a second stage, a third stage, and an automatic gain controller. The first stage amplifies an input signal to provide a first signal. The second stage amplifies or attenuates the first signal to provide a second signal based on a tunable gain of the second stage. The tunable gain is adjusted in response to a differential signal. The third stage amplifies the second signal to provide an output signal. The automatic gain controller provides the differential signal based on a comparison between a peak voltage of the output signal and the sum of a common mode voltage of the output signal and an offset voltage.

公开(公告)号：US09973218B2

公开(公告)日：2018-05-15

申请号：US15266574

申请日：2016-09-15

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Kehan Zhu ,  Cheng Li ,  Zhubiao Zhu

IPC: H04B1/04 ,  H04B10/80 ,  H03K17/687 ,  H04L27/04 ,  H01S5/042 ,  H03K19/0175 ,  H04B10/54

CPC classification number: H04B1/04 ,  H01S5/0427 ,  H03K19/017509 ,  H04B10/524 ,  H04B10/541 ,  H04B10/801 ,  H04L27/04

Abstract: An example device in accordance with an aspect of the present disclosure includes at least one segment driver circuit having a first circuit and a second circuit, to receive input signals and provide output signals. A given segment driver circuit is to protect reliability and enable reconfigurability by selectively resetting coupling capacitors, and selectively cutting off the input signals from their respective segment driver circuit.

公开(公告)号：US10432319B2

公开(公告)日：2019-10-01

申请号：US15768975

申请日：2015-10-29

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Kehan Zhu ,  Cheng Li ,  Marco Fiorentino

IPC: H04B10/00 ,  H04B10/69 ,  H04B10/2507 ,  H04B10/25 ,  H04L25/49 ,  H04J14/00

Abstract: One example of a receiver includes a first stage, a second stage, a third stage, and an automatic gain controller. The first stage amplifies an input signal to provide a first signal. The second stage amplifies or attenuates the first signal to provide a second signal based on a tunable gain of the second stage. The tunable gain is adjusted in response to a differential signal. The third stage amplifies the second signal to provide an output signal. The automatic gain controller provides the differential signal based on a comparison between a peak voltage of the output signal and the sum of a common mode voltage of the output signal and an offset voltage.

公开(公告)号：US10193634B2

公开(公告)日：2019-01-29

申请号：US15269542

申请日：2016-09-19

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Cheng Li ,  Di Liang ,  Kehan Zhu

IPC: H04B10/564 ,  H04L27/01 ,  H04B10/54 ,  H04L25/02 ,  H04L25/03 ,  H04B10/80

Abstract: Examples disclosed herein relate to optical driver circuits. In some of the disclosed examples, an optical driver circuit includes a pre-driver circuit and a main driver circuit. The pre-driver circuit may include a pattern generator and at least one serializer to generate a main modulation signal and an inverted delayed modulation signal. The main driver circuit may include a level controller to control amplitudes of pre-emphasis on rising and falling edges of a modulation signal output and an equalization controller to transition the modulation signal output from the pre-emphasis amplitudes to main modulation amplitudes using the inverted delayed modulation signal.

公开(公告)号：US10530488B2

公开(公告)日：2020-01-07

申请号：US16231159

申请日：2018-12-21

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Cheng Li ,  Di Liang ,  Kehan Zhu

IPC: H04L27/01 ,  H04B10/564 ,  H04B10/54 ,  H04B10/80 ,  H04L25/02 ,  H04L25/03 ,  H04B10/50 ,  H04B10/58

Abstract: Examples disclosed herein relate to optical driver circuits. In some of the disclosed examples, an optical driver circuit includes a pre-driver circuit and a main driver circuit. The pre-driver circuit may include a pattern generator and at least one serializer to generate a main modulation signal and an inverted delayed modulation signal. The main driver circuit may include a level controller to control amplitudes of pre-emphasis on rising and falling edges of a modulation signal output and an equalization controller to transition the modulation signal output from the pre-emphasis amplitudes to main modulation amplitudes using the inverted delayed modulation signal.

公开(公告)号：US20180083711A1

公开(公告)日：2018-03-22

申请号：US15269542

申请日：2016-09-19

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Cheng Li ,  Di Liang ,  Kehan Zhu

IPC: H04B10/564 ,  H04L27/01 ,  H04B10/54

CPC classification number: H04B10/564 ,  H04B10/504 ,  H04B10/541 ,  H04B10/58 ,  H04B10/801 ,  H04L25/028 ,  H04L25/03885 ,  H04L27/01

Abstract: Examples disclosed herein relate to optical driver circuits. In some of the disclosed examples, an optical driver circuit includes a pre-driver circuit and a main driver circuit. The pre-driver circuit may include a pattern generator and at least one serializer to generate a main modulation signal and an inverted delayed modulation signal. The main driver circuit may include a level controller to control amplitudes of pre-emphasis on rising and falling edges of a modulation signal output and an equalization controller to transition the modulation signal output from the pre-emphasis amplitudes to main modulation amplitudes using the inverted delayed modulation signal.

公开(公告)号：US20180076836A1

公开(公告)日：2018-03-15

申请号：US15266574

申请日：2016-09-15

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Kehan Zhu ,  Cheng Li ,  Zhubiao Zhu

IPC: H04B1/04 ,  H03K19/0175 ,  H03K17/687 ,  H04L27/04

CPC classification number: H04B1/04 ,  H01S5/0427 ,  H03K19/017509 ,  H04B10/524 ,  H04B10/541 ,  H04B10/801 ,  H04L27/04

Abstract: An example device in accordance with an aspect of the present disclosure includes at least one segment driver circuit having a first circuit and a second circuit, to receive input signals and provide output signals. A given segment driver circuit is to protect reliability and enable reconfigurability by selectively resetting coupling capacitors, and selectively cutting off the input signals from their respective segment driver circuit.