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公开(公告)号：US20220103405A1
公开(公告)日：2022-03-31
申请号：US17503085
申请日：2021-10-15
Applicant: Rambus Inc.
Inventor： Jared L. Zerbe , Fred F. Chen , Andrew Ho , Ramin Farjad-Rad , John W. Poulton , Kevin S. Donnelly , Brian S. Leibowitz , Vladimir Stojanovic
Abstract: A signaling system includes a pre-emphasizing transmitter and an equalizing receiver coupled to one another via a high-speed signal path. The receiver measures the quality of data conveyed from the transmitter. A controller uses this information and other information to adaptively establish appropriate transmit pre-emphasis and receive equalization settings, e.g. to select the lowest power setting for which the signaling system provides some minimum communication bandwidth without exceeding a desired bit-error rate.
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公开(公告)号：US20210126722A1
公开(公告)日：2021-04-29
申请号：US17102779
申请日：2020-11-24
Applicant: Rambus Inc.
Inventor： Andrew Ho , Vladimir Stojanovic , Bruno W. Garlepp , Fred F. Chen
IPC: H04B17/29 , H04L25/03 , H04L27/01 , H04B17/21 , G01R31/317 , H04L1/20 , H04L1/24 , H04L7/033 , G06F11/08
Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
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公开(公告)号：US20190190627A1
公开(公告)日：2019-06-20
申请号：US16228470
申请日：2018-12-20
Applicant: Rambus Inc.
Inventor： Andrew Ho , Vladimir Stojanovic , Bruno W. Garlepp , Fred F. Chen
IPC: H04B17/29 , H04L1/20 , H04L1/24 , H04L25/03 , H04B17/21 , G01R31/317 , H04L27/01 , H04L7/033 , G06F11/08
CPC classification number: H04B17/29 , G01R31/31711 , G06F11/08 , H04B17/21 , H04L1/20 , H04L1/241 , H04L1/242 , H04L7/033 , H04L7/043 , H04L7/10 , H04L25/03006 , H04L25/03057 , H04L25/03146 , H04L25/03949 , H04L27/01
Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
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公开(公告)号：US20140161166A1
公开(公告)日：2014-06-12
申请号：US13967530
申请日：2013-08-15
Applicant: Rambus Inc.
Inventor： Andrew Ho , Vladimir Stojanovic , Bruno W. Garlepp , Fred F. Chen
IPC: H04B17/00
CPC classification number: H04B17/29 , G01R31/31711 , G06F11/08 , H04B17/21 , H04L1/20 , H04L1/241 , H04L1/242 , H04L7/033 , H04L7/043 , H04L7/10 , H04L25/03006 , H04L25/03057 , H04L25/03146 , H04L25/03949 , H04L27/01
Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data, and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns, and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
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公开(公告)号：US20210006341A1
公开(公告)日：2021-01-07
申请号：US16930526
申请日：2020-07-16
Applicant: Rambus Inc.
Inventor： Andrew Ho , Vladimir Stojanovic , Bruno W. Garlepp , Fred F. Chen
IPC: H04B17/29 , H04L25/03 , H04L27/01 , H04B17/21 , G01R31/317 , H04L1/20 , H04L1/24 , H04L7/033 , G06F11/08
Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
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公开(公告)号：US10193642B2
公开(公告)日：2019-01-29
申请号：US15368805
申请日：2016-12-05
Applicant: Rambus Inc.
Inventor： Andrew Ho , Vladimir Stojanovic , Bruno W. Garlepp , Fred F. Chen
IPC: H04B17/29 , H04L25/03 , H04L27/01 , G01R31/317 , H04L1/20 , H04L1/24 , H04L7/033 , G06F11/08 , H04B17/21 , H04L7/04 , H04L7/10
Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data, and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns, and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
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公开(公告)号：US20170149513A1
公开(公告)日：2017-05-25
申请号：US15368805
申请日：2016-12-05
Applicant: Rambus Inc.
Inventor： Andrew Ho , Vladimir Stojanovic , Bruno W. Garlepp , Fred F. Chen
CPC classification number: H04B17/29 , G01R31/31711 , G06F11/08 , H04B17/21 , H04L1/20 , H04L1/241 , H04L1/242 , H04L7/033 , H04L7/043 , H04L7/10 , H04L25/03006 , H04L25/03057 , H04L25/03146 , H04L25/03949 , H04L27/01
Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data, and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns, and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
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公开(公告)号：US20190199563A1
公开(公告)日：2019-06-27
申请号：US16256882
申请日：2019-01-24
Applicant: Rambus Inc.
Inventor： Jared L. Zerbe , Fred F. Chen , Andrew Ho , Ramin Farjad-Rad , John W. Poulton , Kevin S. Donnelly , Brian S. Leibowitz , Vladimir Stojanovic
CPC classification number: H04L27/01 , H04L1/0026 , H04L7/0025 , H04L7/0087 , H04L7/0337 , H04L25/0272 , H04L25/028 , H04L25/03057 , H04L25/03343 , H04L25/03885 , H04L25/497 , H04L2025/03503 , H04W52/20 , H04W52/225 , Y02D70/00
Abstract: A signaling system includes a pre-emphasizing transmitter and an equalizing receiver coupled to one another via a high-speed signal path. The receiver measures the quality of data conveyed from the transmitter. A controller uses this information and other information to adaptively establish appropriate transmit pre-emphasis and receive equalization settings, e.g. to select the lowest power setting for which the signaling system provides some minimum communication bandwidth without exceeding a desired bit-error rate.
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公开(公告)号：US09116810B2
公开(公告)日：2015-08-25
申请号：US14333665
申请日：2014-07-17
Applicant: Rambus Inc.
Inventor： Andrew Ho , Vladimir Stojanovic , Bruno W. Garlepp , Fred F. Chen
IPC: G06F11/08 , G01R31/317 , H04L1/20 , H04L1/24 , H04L7/033 , H04B17/21 , H04L7/04 , H04L7/10 , H04L25/03
CPC classification number: H04B17/29 , G01R31/31711 , G06F11/08 , H04B17/21 , H04L1/20 , H04L1/241 , H04L1/242 , H04L7/033 , H04L7/043 , H04L7/10 , H04L25/03006 , H04L25/03057 , H04L25/03146 , H04L25/03949 , H04L27/01
Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data, and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns, and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
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公开(公告)号：US11233589B2
公开(公告)日：2022-01-25
申请号：US17102779
申请日：2020-11-24
Applicant: Rambus Inc.
Inventor： Andrew Ho , Vladimir Stojanovic , Bruno W. Garlepp , Fred F. Chen
IPC: H04B17/29 , H04L25/03 , H04L27/01 , H04B17/21 , G01R31/317 , H04L1/20 , H04L1/24 , H04L7/033 , G06F11/08 , H04L7/04 , H04L7/10
Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
