公开(公告)号：US09899973B2

公开(公告)日：2018-02-20

申请号：US15073735

申请日：2016-03-18

Applicant: INPHI CORPORATION

Inventor： Florin Pera ,  Stephane Dallaire ,  Brian Wall

IPC: H03F1/02 ,  H03F3/193 ,  H03M1/66 ,  H03F3/45 ,  H03F3/16 ,  H03G3/30 ,  H04Q11/00 ,  H04B10/54

CPC classification number: H03F3/45179 ,  H03F1/08 ,  H03F1/301 ,  H03F3/16 ,  H03F3/45475 ,  H03F3/45941 ,  H03F2200/135 ,  H03F2200/18 ,  H03F2200/405 ,  H03F2200/411 ,  H03F2200/447 ,  H03F2203/45212 ,  H03F2203/45288 ,  H03G1/0029 ,  H03G1/0088 ,  H03G3/30 ,  H04B10/541 ,  H04B10/6931 ,  H04Q11/0071 ,  H04Q2011/0013 ,  H04Q2011/0035

Abstract: Split cascade circuits include multiple cascade paths coupled between voltage supply rails. Each cascade path includes a pair of controllable switches. A feedback path is provided for at least one of the cascade circuit paths. An active load circuit may also have a split cascade structure. Multiple-stage circuits, for implementation in Trans-Impedance Amplifiers (TIAs) or analog Receive Front-End modules (RXFEs), for example, include multiple stages of split cascade circuits.

公开(公告)号：US20170373761A1

公开(公告)日：2017-12-28

申请号：US15195863

申请日：2016-06-28

Applicant: INPHI CORPORATION

Inventor： Kevin Parker ,  Lawrence Tse ,  Kenji Suzuki ,  Brian Wall ,  Stephane Dallaire ,  Florin Pera

IPC: H04B10/66 ,  H04L25/03

CPC classification number: H04B10/66 ,  H04L25/03006

Abstract: An optical receiver that recovers data is disclosed. The optical receiver includes a photodetector configured to convert an optical signal into a current signal, and a TIA (Transimpedance Amplifier) configured to operate according to a set of parameters to convert the current signal to a voltage signal. The optical receiver also includes an equalizer configured to process the voltage signal to produce a processed signal having recovered data from the optical signal, and to produce one or more equalization metrics. According to an embodiment of the disclosure, the optical receiver has a feedback processor configured to automatically tune operation of the TIA by adjusting at least one of the parameters of the TIA based on the one or more equalization metrics. This may effect a change in performance or power consumption of the optical receiver while receiving and recovering data. A corresponding method for recovering data is also disclosed.

公开(公告)号：US09742594B2

公开(公告)日：2017-08-22

申请号：US15372051

申请日：2016-12-07

Applicant: INPHI CORPORATION

Inventor： Stephane Dallaire ,  Benjamin Smith

IPC: H04L7/033 ,  H04L25/03 ,  H04L7/027

CPC classification number: H04L25/03006 ,  H04L7/027 ,  H04L25/03057 ,  H04L25/03885

Abstract: Clock timing skew may occur during operation of a time-interleaved receiver. It would be beneficial to try to determine if there is timing skew, and if there is, then address it, such as by reducing or eliminating some or all of the timing skew. Embodiments are described herein that may achieve this. In one embodiment, a method includes generating at least two clocks having the same frequency but a different phase. Intersymbol interference (ISI) values are then determined, one for each of the clocks, by: for each clock, sampling a signal using the clock and determining a value representing ISI based on the sampled signal. A clock phase of at least one of the clocks is adjusted in response to at least one of the ISI values being different from a reference ISI value.

公开(公告)号：US10312873B2

公开(公告)日：2019-06-04

申请号：US15863473

申请日：2018-01-05

Applicant: INPHI CORPORATION

Inventor： Florin Pera ,  Stephane Dallaire ,  Brian Wall

IPC: H03F1/08 ,  H03F1/30 ,  H03F3/16 ,  H03F3/45 ,  H03G1/00 ,  H03G3/30 ,  H04B10/54 ,  H04B10/69 ,  H04Q11/00

Abstract: Split cascode circuits include multiple cascode paths coupled between voltage supply rails. Each cascode path includes a pair of controllable switches. A feedback path is provided for at least one of the cascode circuit paths. An active load circuit may also have a split cascode structure. Multiple-stage circuits, for implementation in Trans-Impedance Amplifiers (TIAs) or analog Receive Front-End modules (RXFEs), for example, include multiple stages of split cascode circuits.

公开(公告)号：US10122472B2

公开(公告)日：2018-11-06

申请号：US15195863

申请日：2016-06-28

Applicant: INPHI CORPORATION

Inventor： Kevin Parker ,  Lawrence Tse ,  Kenji Suzuki ,  Brian Wall ,  Stephane Dallaire ,  Florin Pera

IPC: H04B10/66 ,  H04L25/03

Abstract: An optical receiver that recovers data is disclosed. The optical receiver includes a photodetector configured to convert an optical signal into a current signal, and a TIA (Transimpedance Amplifier) configured to operate according to a set of parameters to convert the current signal to a voltage signal. The optical receiver also includes an equalizer configured to process the voltage signal to produce a processed signal having recovered data from the optical signal, and to produce one or more equalization metrics. According to an embodiment of the disclosure, the optical receiver has a feedback processor configured to automatically tune operation of the TIA by adjusting at least one of the parameters of the TIA based on the one or more equalization metrics. This may effect a change in performance or power consumption of the optical receiver while receiving and recovering data. A corresponding method for recovering data is also disclosed.

公开(公告)号：US09660841B2

公开(公告)日：2017-05-23

申请号：US15260692

申请日：2016-09-09

Applicant: INPHI CORPORATION

Inventor： Stephane Dallaire ,  Benjamin P. Smith ,  Travis William Lovitt ,  Arash Farhoodfar

IPC: H03K9/00 ,  H04L27/01 ,  H03H7/30 ,  H04L25/03 ,  H04L25/06 ,  H04B1/10 ,  H04L12/26

CPC classification number: H04L25/03019 ,  H04B1/10 ,  H04L25/03057 ,  H04L25/061 ,  H04L43/028 ,  H04L2025/03363 ,  H04Q2213/03

Abstract: Receiver circuitry is disclosed that can take circuit branches offline to possibly adapt an offset value. In one embodiment, a circuit in a receiver has at least two branches. Each branch includes an adjustor to adjust the branch signal by an offset value. Selection circuitry takes one of the branches offline by selecting the output of that branch as an offline value, and by selecting the output of one or more of the other branches as a data decision value. The selection circuitry changes which branch is taken offline during the operation of the circuit. When a branch is taken offline, an offset value associated with that branch may be updated, if necessary.