公开(公告)号：US10036853B1

公开(公告)日：2018-07-31

申请号：US15464805

申请日：2017-03-21

Applicant: INPHI CORPORATION

Inventor： Jie Lin

IPC: G02B6/12 ,  G02B6/293

CPC classification number: G02B6/29344 ,  G02B6/12007

Abstract: A multiplexer/demultiplexer for at least two wavelengths in O-band. The multiplexer/demultiplexer includes a silicon waveguide block having a first port, a second/third port respectively in bar/cross position at an opposing end plane relative to the first port. The silicon waveguide block is configured to provide a general interference excitation of a light wave of a first wavelength and a second wavelength respectively selected from two windows in O-band. The light wave is either inputted via the first port and split into a first output light of the first wavelength out of the second port and a second output light of the second wavelength out of the third port, or is combined of a first input light of the first wavelength from the second port and a second input light of the second wavelength from the third port and outputted via the first port with both wavelengths.

公开(公告)号：US20180212712A1

公开(公告)日：2018-07-26

申请号：US15411914

申请日：2017-01-20

Applicant: INPHI CORPORATION

Inventor： Todd ROPE ,  Radhakrishnan L. NAGARAJAN

IPC: H04L1/00 ,  H04B10/40 ,  H04B10/079 ,  H04L1/20

CPC classification number: H04B10/07953 ,  H04B10/40 ,  H04L1/0047

Abstract: The present invention is directed to communication systems and methods. According to an embodiment, a receiving optical transceiver determines signal quality for signals received from a transmitting optical transceiver. Information related to the signal quality is embedded into back-channel data and sent to the transmitting optical transceiver. The transmitting optical transceiver detects the presence of the back-channel data and adjusts one or more of its operating parameters based on the back-channel data. There are other embodiments as well.

公开(公告)号：US20180205464A1

公开(公告)日：2018-07-19

申请号：US15873755

申请日：2018-01-17

Applicant: INPHI CORPORATION

Inventor： Tom Peter Edward BROEKAERT ,  Hari SHANKAR

IPC: H04B10/516 ,  H04B10/272 ,  H04B10/40 ,  H04L7/00 ,  H04B10/54

CPC classification number: H04B10/5161 ,  H04B10/27 ,  H04B10/272 ,  H04B10/40 ,  H04B10/524 ,  H04B10/541 ,  H04B10/5561 ,  H04L7/0075

Abstract: The present invention is directed to data communication system and methods. More specifically, various embodiments of the present invention provide a communication interface that is configured to transfer data at high bandwidth using PAM format(s) over optical communication networks. In various embodiments, amplitude and phase of the optical wave are modulated. There are other embodiments as well.

公开(公告)号：US10014836B1

公开(公告)日：2018-07-03

申请号：US15418487

申请日：2017-01-27

Applicant: INPHI CORPORATION

Inventor： James Gorecki

IPC: H03F3/45 ,  H03G1/00 ,  H03F1/56 ,  H03F1/02 ,  H03G3/00

CPC classification number: H03G1/007 ,  H03F1/0205 ,  H03F1/56 ,  H03F3/45197 ,  H03F2203/45492 ,  H03G3/001

Abstract: The present invention is directed to electrical circuits. More specifically, embodiments of the present invention provide a variable gain amplifier (VGA) device that includes a low-gain tuning section and a high-gain tuning section. The low-gain tuning section includes both resistor and transistor elements. The high-gain tuning section includes a transistor element and is activated when an output gain is greater than a predetermined threshold level. There are other embodiments as well.

公开(公告)号：US10009214B1

公开(公告)日：2018-06-26

申请号：US15673352

申请日：2017-08-09

Applicant: INPHI CORPORATION

Inventor： Arash Farhoodfar ,  Jitendra Swarnkar ,  Michael Duckering ,  Andre Sczapanek ,  Scott Feller ,  Shaun Lytollis

IPC: H03D1/04 ,  H04L29/08 ,  G06F11/20 ,  H04L12/427 ,  H04L1/22 ,  H04L12/24 ,  H04L12/40 ,  H04W28/06 ,  H04W28/04

Abstract: The present invention is directed to data communication. In certain embodiments, the present invention provides switching mechanism for choosing between redundant communication links. Data received from a first set of communication links are processed to have alignment markers removed, and first figure of merit value is determined based on the data without alignment markers. Similarly, a second figure of merit value is determined for the data received from the second set of communication links. A switch selects between the first set of communication links and the second set of communication links based on their respective figure of merit values. Alignment markers are inserted into the data transmitted through the selected set of data links. There are other embodiments as well.

公开(公告)号：US10009200B2

公开(公告)日：2018-06-26

申请号：US15405020

申请日：2017-01-12

Applicant: INPHI CORPORATION

Inventor： Arun Tiruvur ,  Jamal Riani ,  Sudeep Bhoja

IPC: H04L27/04 ,  H04L1/00

CPC classification number: H04L27/04 ,  H04L1/0041 ,  H04L1/0042 ,  H04L1/0045 ,  H04L25/14

Abstract: Embodiments of the present invention include an apparatus that receives date from multiple lanes, which are then aligned and synchronized for transcoding and encoding.

公开(公告)号：US10009109B2

公开(公告)日：2018-06-26

申请号：US15688435

申请日：2017-08-28

Applicant: INPHI CORPORATION

Inventor： Todd Rope ,  Radhakrishnan L. Nagarajan ,  Jamal Riani ,  Pulkit Khandelwal

IPC: H04B10/079 ,  H04B10/40

CPC classification number: H04B10/40 ,  H04B10/0731 ,  H04B10/0795 ,  H04B10/524

Abstract: A Pulse Amplitude Modulated (PAM) optical device utilizing multiple wavelengths, features a communications interface having enhanced diagnostics capability. New registers are created to house additional diagnostic information, such as error rates. The diagnostic information may be stored in raw form, or as processed on-chip utilizing local resources.

公开(公告)号：US09966917B2

公开(公告)日：2018-05-08

申请号：US15460750

申请日：2017-03-16

Applicant: INPHI CORPORATION

Inventor： Ariel Leonardo Vera Villarroel ,  Subramaniam Shankar ,  Steffen O. Nielsen

IPC: H03G3/30 ,  H03F3/19 ,  H03F3/45

CPC classification number: H03G3/3036 ,  H03F1/0205 ,  H03F1/083 ,  H03F3/19 ,  H03F3/211 ,  H03F3/4508 ,  H03F3/45085 ,  H03F2200/451 ,  H03F2200/91 ,  H03F2203/45458 ,  H03F2203/45496 ,  H03F2203/45644 ,  H03G1/0023 ,  H03G1/0082 ,  H03G5/28

Abstract: A variable gain amplifier having stabilized frequency response for widened gain control range. A resistor-capacitor compensation network is provided between two differential current input ports and corresponding emitter nodes of cross-coupled four transistors in the variable gain amplifier to desensitize the gain control voltages to the system noise and provide compensation to the VGA frequency response when the differential gain control voltage varies the gain setting, yielding a substantially stabilized frequency response over a −3 dB bandwidth ranging from 1 GHz to 60 GHz with a widened gain control range up to 12 dB without increasing power consumption.

公开(公告)号：US20180102852A1

公开(公告)日：2018-04-12

申请号：US15836603

申请日：2017-12-08

Applicant: INPHI CORPORATION

Inventor： Benjamin P. SMITH ,  Jamal RIANI ,  Sudeep BHOJA ,  Arash FARHOODFAR ,  Vipul BHATT

IPC: H04B10/58 ,  H04B10/69 ,  H04B10/2507 ,  H04B10/516

CPC classification number: H04B10/58 ,  H04B10/2507 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/697 ,  H04B10/6971

Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.

公开(公告)号：US09899969B1

公开(公告)日：2018-02-20

申请号：US15683444

申请日：2017-08-22

Applicant: INPHI CORPORATION

Inventor： Tom Broekaert

IPC: H03F3/08 ,  H03F1/34 ,  H04B10/25 ,  H04B10/54 ,  H04Q11/00

CPC classification number: H03F3/082 ,  H03F1/086 ,  H03F1/3211 ,  H03F1/342 ,  H03F3/45179 ,  H03F2200/339 ,  H03F2203/45528 ,  H04B10/2504 ,  H04B10/541 ,  H04B10/6931 ,  H04Q11/0005 ,  H04Q2011/0039 ,  H04Q2011/0041

Abstract: A transimpedance amplifier (TIA) structure includes an input node with a variable inductance component serving to reduce variation in peak amplitude over different gain conditions. According to certain embodiments, an inductor at the TIA input has a first node in communication with a Field Effect Transistor (FET) drain, and a second node in communication with the FET source. A control voltage applied to the FET gate effectively controls the input inductance by adding a variable impedance across the inductor. Under low gain conditions, lowering of inductance afforded by the control voltage applied to the FET reduces voltage peaking. TIAs in accordance with embodiments may be particularly suited to operate over a wide dynamic range to amplify incoming electrical signals received from a photodiode.