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公开(公告)号：US10382236B2
公开(公告)日：2019-08-13
申请号：US16295210
申请日：2019-03-07
Applicant: INPHI CORPORATION
Inventor： Richard Ward , Parmanand Mishra
Abstract: The present invention is directed to data communication. In a specific embodiment, a known data segment is received through a data communication link. The received data is equalized by an equalizer using an adjustable equalization parameter. The output of the equalizer is sampled, and a waveform is obtained by sweeping one or more sampler parameters. The waveform is evaluated by comparing it to the known data segment. Based on the quality of the waveform, equalizer parameter is determined. There are other embodiments as well.
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公开(公告)号：US10270628B1
公开(公告)日：2019-04-23
申请号：US15148905
申请日：2016-05-06
Applicant: INPHI CORPORATION
Inventor： Richard Ward , Parmanand Mishra
Abstract: The present invention is directed to data communication. In a specific embodiment, a known data segment is received through a data communication link. The received data is equalized by an equalizer using an adjustable equalization parameter. The output of the equalizer is sampled, and a waveform is obtained by sweeping one or more sampler parameters. The waveform is evaluated by comparing it to the known data segment. Based on the quality of the waveform, equalizer parameter is determined. There are other embodiments as well.
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公开(公告)号：US10193640B2
公开(公告)日：2019-01-29
申请号：US15995042
申请日：2018-05-31
Applicant: INPHI CORPORATION
Inventor： Simon Forey , Rajasekhar Nagulapalli , Parmanand Mishra , Michael S. Harwood
IPC: H04B17/21 , H04B17/318 , H03K5/19 , H03K3/3565 , H04L12/26
Abstract: The present invention is directed to data communication. According to a specific embodiment, the present invention provides technique for loss of signal detection. A loss-of-signal detection (LOSD) device determines an analog signal indicating signal strength by subtracting a threshold offset voltage from an incoming signal. The analog signal is then processed by a switch network of an output stage circuit, which provides a digital output of loss of signal indication at a low frequency (relative to the incoming signal frequency). There are other embodiments as well.
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公开(公告)号：US10129017B1
公开(公告)日：2018-11-13
申请号：US16028229
申请日：2018-07-05
Applicant: INPHI CORPORATION
Inventor： Parmanand Mishra , Simon Forey
CPC classification number: H04L7/0331 , H03L7/00 , H03M9/00 , H04B17/318 , H04L7/0083 , H04L7/0091 , H04L7/033 , H04L25/0262 , H04L27/01 , H04L43/04 , H04L43/16
Abstract: The present invention is directed to data communication. More specifically, an embodiment of the present invention provides a technique for detecting loss of signal. An incoming data stream is sampled and a recovered clock signal is generated accordingly. An output clock signal of a higher frequency than the recovered clock signal is generated by a transmission PLL. The frequency of the recovered clock signal is compared to a divided frequency of the output clock signal. If a difference between the recovered clock signal and the output clock signal is greater than a threshold, a loss of signal indication is provided. There are other embodiments as well.
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公开(公告)号：US10014965B1
公开(公告)日：2018-07-03
申请号：US15343653
申请日：2016-11-04
Applicant: INPHI CORPORATION
Inventor： Simon Forey , Rajasekhar Nagulapalli , Parmanand Mishra , Michael S. Harwood
IPC: H04B17/21 , H04B17/318 , H03K5/19 , H03K3/3565 , H04L12/26
CPC classification number: H04B17/21 , H03K3/3565 , H03K5/19 , H04B17/318
Abstract: The present invention is directed to data communication. According to a specific embodiment, the present invention provides technique for loss of signal detection. A loss-of-signal detection (LOSD) device determines an analog signal indicating signal strength by subtracting a threshold offset voltage from an incoming signal. The analog signal is then processed by a switch network of an output stage circuit, which provides a digital output of loss of signal indication at a low frequency (relative to the incoming signal frequency). There are other embodiments as well.
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Patent Agency Ranking
公开(公告)号：US09742551B2
公开(公告)日：2017-08-22
申请号：US15162402
申请日：2016-05-23
Applicant: INPHI CORPORATION
Inventor： Simon Forey , Parmanand Mishra
CPC classification number: H04L7/0331 , H03L7/087 , H03M9/00 , H04L7/033
Abstract: The present application is directed to data communication. More specifically, embodiments of the present invention provide a SerDes system that includes multiple communication lanes that are aligned using a clock signal. Each of the communication lanes comprises a receiver, a buffer, and a transmitter. The receiver uses multiple sampling lanes for data sampling and clock recovery. Sampled data are stored at the buffer and transmitted by the transmitter. There are other embodiments as well.
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公开(公告)号：US09548856B2
公开(公告)日：2017-01-17
申请号：US15252057
申请日：2016-08-30
Applicant: INPHI CORPORATION
Inventor： Parmanand Mishra , Simon Forey
CPC classification number: H04L7/0079 , H03K5/135 , H03K2005/00052 , H03L7/0807 , H04B1/10 , H04B1/40 , H04L7/033 , H04L7/0331 , H04L7/06 , H04L7/10
Abstract: The present invention is directed to data communication. More specifically, the present invention provides a mechanism for determining an adjustment delay that minimizes skew error due to poor alignment between edge samples and data samples. The adjustment delay is determined by sampling edge samples and data samples using different test delays at a calibration frequency that is different from the sampling frequency. The test delay associated with the least average position between the data samples and edge samples is selected as the adjustment delay. The adjustment delay is used as a parameter when sampling data at the sampling frequency. There are other embodiments as well.
Abstract translation: 本发明涉及数据通信。 更具体地，本发明提供了一种用于确定最小化由于边缘样本和数据样本之间的不良对准引起的偏斜误差的调整延迟的机制。 调整延迟由采样边缘样本和采样频率不同的不同测试延迟采样数据样本确定。 选择与数据样本和边缘样本之间的最小平均位置相关联的测试延迟作为调整延迟。 当以采样频率采样数据时，调整延迟用作参数。 还有其它实施例。
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公开(公告)号：US09485119B1
公开(公告)日：2016-11-01
申请号：US14798308
申请日：2015-07-13
Applicant: Inphi Corporation
Inventor： Parmanand Mishra , Simon Forey
IPC: H04L25/03
CPC classification number: H03M1/1023 , H03M1/66 , H04L25/03057 , H04L25/03878
Abstract: The present invention is directed to data communication. More specifically, embodiments of the present invention provide an offset correction technique for a SERDES system. A CTLE module for receiving input data signal is set to an isolation mode, and one or more sense amplifiers perform data sampling asynchronously during the isolation mode. During the isolation mode, CLTE(s) that are not directly connected to the sense amplifiers are shut. Data sampled during the isolation mode are used to determine an offset value that is later used in normal operation of the SERDES system. There are other embodiments as well.
Abstract translation: 本发明涉及数据通信。 更具体地，本发明的实施例提供了一种用于SERDES系统的偏移校正技术。 用于接收输入数据信号的CTLE模块被设置为隔离模式，并且一个或多个感测放大器在隔离模式期间异步地进行数据采样。 在隔离模式下，不直接连接到读出放大器的CLTE被关闭。 在隔离模式下采样的数据用于确定稍后在SERDES系统的正常操作中使用的偏移值。 还有其它实施例。
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公开(公告)号：US09413523B1
公开(公告)日：2016-08-09
申请号：US14696326
申请日：2015-04-24
Applicant: INPHI CORPORATION
Inventor： Simon Forey , Parmanand Mishra , Sean Batty
CPC classification number: H04L7/0087 , H03M9/00 , H04B10/6164 , H04L7/0004 , H04L7/0331 , H04L7/06 , H04L27/152
Abstract: The present invention is directed to data communication. More specifically, embodiments of the present invention provide a method for acquiring sampling frequency by sweeping through a predetermined frequency range, performing data sampling at different frequencies within the predetermined frequency range, and determining a target frequency for sampling data based on a maximum early peak frequency and a maximum late peak frequency. There are other embodiments as well.
Abstract translation: 本发明涉及数据通信。 更具体地，本发明的实施例提供一种通过扫过预定频率范围来获取采样频率的方法，在预定频率范围内以不同频率执行数据采样，并且基于最大早峰频率来确定用于采样数据的目标频率 和最大晚峰频率。 还有其它实施例。
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公开(公告)号：US09374217B1
公开(公告)日：2016-06-21
申请号：US14853912
申请日：2015-09-14
Applicant: INPHI CORPORATION
Inventor： Simon Forey , Parmanand Mishra
CPC classification number: H04L7/0331 , H03L7/087 , H03M9/00 , H04L7/033
Abstract: The present application is directed to data communication. More specifically, embodiments of the present invention provide a SerDes system that includes multiple communication lanes that are aligned using a clock signal. Each of the communication lanes comprises a receiver, a buffer, and a transmitter. The receiver uses multiple sampling lanes for data sampling and clock recovery. Sampled data are stored at the buffer and transmitted by the transmitter. There are other embodiments as well.
Abstract translation: 本申请涉及数据通信。 更具体地，本发明的实施例提供了一种SerDes系统，其包括使用时钟信号对准的多个通信通道。 每个通信通道包括接收器，缓冲器和发射器。 接收机使用多个采样通道进行数据采样和时钟恢复。 采样数据存储在缓冲区并由发送器发送。 还有其它实施例。
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