公开(公告)号：US20180234096A1

公开(公告)日：2018-08-16

申请号：US15749370

申请日：2015-07-31

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Cheng LI ,  Kunzhi YU ,  Marco FIORENTINO ,  Raymond G BEAUSOLEIL

IPC: H03K17/78 ,  H03F3/08 ,  H04B10/69 ,  H03K17/94 ,  G01J1/44

CPC classification number: H03K17/78 ,  G01J1/44 ,  H03F3/082 ,  H03K17/941 ,  H04B10/6931

Abstract: In one example, a device includes a photodetector to generate an electrical signal in response to an optical signal and a transimpedance amplifier unit to receive the electrical signal. In one example, the transimpedance amplifier unit may include a first inverter unit, a second inverter unit coupled to the first inverter unit, and a third inverter unit coupled to the second inverter unit. In one example the third inverter unit may include a feedback resistor and a first n-type transistor in parallel to the feedback resistor, where the first n-type transistor is to provide a variable gain of the third inverter unit.

公开(公告)号：US20170359119A1

公开(公告)日：2017-12-14

申请号：US15472766

申请日：2017-03-29

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Cheng LI ,  Marco FIORENTINO ,  Raymond G. BEAUSOLEIL

IPC: H04B10/079 ,  H04B10/69

CPC classification number: H04B10/6931 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60

Abstract: According to one example, errors in a logical signal from a data slicer are detected and a power supply voltage is adjusted based on the detected errors.

公开(公告)号：US20180212682A1

公开(公告)日：2018-07-26

申请号：US15745709

申请日：2015-07-21

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Janet CHEN ,  Cheng LI ,  Marco FIORENTINO ,  Raymond G BEAUSOLEIL

IPC: H04B10/50 ,  H04B10/2575

CPC classification number: H04B10/50572 ,  G02B6/29338 ,  G02B6/29395 ,  G02F1/0121 ,  G02F1/025 ,  G02F2201/58 ,  G02F2203/15 ,  H04B10/0799 ,  H04B10/25755 ,  H04B10/5051 ,  H04B10/506 ,  H04B10/675 ,  H04B10/801

Abstract: One example includes an optical transmitter system. The system includes a waveguide to receive and propagate an optical signal. The system also includes a ring modulation system comprising a ring resonator that is optically coupled to the waveguide and is to resonate a given wavelength of the optical signal in response to an input data signal that is provided to a modulation amplifier to provide carrier injection to change a refractive index of the ring resonator to resonate the given wavelength of the optical signal to modulate the optical signal. The system further includes a tuning controller associated with the ring modulation system. The tuning controller can implement iterative feedback tuning of the ring modulation system based on a relative amplitude of an optical intensity of the given wavelength in the ring resonator and a variable reference amplitude to substantially stabilize the ring resonator with respect to the given wavelength.

公开(公告)号：US20180217625A1

公开(公告)日：2018-08-02

申请号：US15745993

申请日：2015-07-22

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Tsung-Ching HUANG ,  Chin-Hui CHEN ,  Cheng LI

IPC: G05F3/30

Abstract: A circuit includes a startup circuit to provide a charging signal to initiate startup of a reference circuit. The startup circuit includes a detector circuit having a detector current path control, a level shifter having a level shifter current path control, and a charger circuit having a charger current path control. Each of the detector current path control, the level shifter current path control, and the charger circuit current path control enable current flow in the startup circuit when the charger turn-on signal is in the on-state and disable the current flow in the startup circuit when the charger turn-on signal is in the off state.