Patents by Inventor Rajesh Satapathy

Rajesh Satapathy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8934493
    Abstract: Techniques, systems and apparatus are described for implementing an inter-channel ring interface in a communication device. A communication device can include communication channels to carry data at respective first data throughputs. An inter-channel ring interface connects at least some of the communication channels in a ring configuration to form an aggregated group of channels that operates as a single channel at a second data throughput.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: January 13, 2015
    Assignee: Broadcom Corporation
    Inventors: Rahul Durve, Rajesh Satapathy, Chung-Jue Chen, Tiruvur Arun
  • Publication number: 20120219005
    Abstract: Techniques, systems and apparatus are described for implementing an inter-channel ring interface in a communication device. A communication device can include communication channels to carry data at respective first data throughputs. An inter-channel ring interface connects at least some of the communication channels in a ring configuration to form an aggregated group of channels that operates as a single channel at a second data throughput.
    Type: Application
    Filed: April 12, 2011
    Publication date: August 30, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Rahul Durve, Rajesh Satapathy, Chung-Jue Chen, Tiruvur Arun
  • Patent number: 8243590
    Abstract: Certain aspects of the invention for seamless port bypass controller operations for storage systems, for example, and may comprise a first port of a port bypass controller that receives an input signal and at least one of a plurality of selectors that selects at least a second port coupled in a chain to the first port. At least one of the selectors may switch at least a portion of the received input signal from the first port to at least the second port without initializing or reconfiguring the second port. A repeater may repeat at least a portion of the received input signal to the second port without initializing or reconfiguring the second port. A retimer may generate a retimed signal corresponding to at least a portion of the received input signal to the second port without initializing or reconfiguring the second port.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: August 14, 2012
    Assignee: Broadcom Corporation
    Inventors: Chung-Jue Chen, Ali Ghiasi, Jay Proano, Rajesh Satapathy, Steve Thomas
  • Patent number: 8077819
    Abstract: A search engine selects initial coefficients for a receive equalizer. The search engine may be incorporated into a communication receiver that includes a decision feedback equalizer and clock and data recovery circuit. Here, the search engine may initialize various adaptation loops that may control the operation of, for example, a decision feedback equalizer, a clock and data recovery circuit and a continuous time filter. The receiver may include an analog-to-digital converter that is used to generate soft decision data for some of the adaptation loops.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: December 13, 2011
    Assignee: Broadcom Corporation
    Inventors: Afshin Momtaz, Rajesh Satapathy, Chung-Jue Chen
  • Patent number: 7765343
    Abstract: Certain embodiments of the invention may be found in a method and system for handling data in port bypass controllers for storage systems and may comprise receiving a data stream from a receive port bypass controller's port and buffering at least a portion of the received data stream in at least one EFIFO buffer integrated within the port bypass controller. A data rate or frequency of the received data stream may be changed by inserting at least one extended fill word in the buffered portion of the received data stream or by deleting at least one fill word from the received data stream buffered in the EFIFO buffer. The extended fill word may comprise a loop initialization primitive (LIP), a loop port bypass (LPB), a loop port enable (LPE), a not operation state (NOS), an offline state (OLS), a link reset response (LRR) and/or a link reset (LR).
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: July 27, 2010
    Assignee: Broadcom Corporation
    Inventors: Chung-Jue Chen, Ali Ghiasi, Jay Proano, Rajesh Satapathy, Steve Thomas
  • Patent number: 7702010
    Abstract: A system is presented that monitors the quality of a communications channel with mirror receivers. A first receiver and a second receiver, coupled in parallel with the first receiver, receive a data signal transmitted over the communications channel. The second receiver generates an output signal. A signal integrity (SI) processor manipulates the output signal in order to determine the quality of the communications channel. The SI processor samples a phase-shifted version of the output signal, which has a phase shifted relative to a zero reference phase, and analyzes the phase-shifted version of the output signal for bit errors. In an embodiment, the SI processor manipulates the output signal to extract an eye diagram indicative of the quality of the communications channel. The SI processor non-intrusively determines the quality of the communications channel using the second receiver.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: April 20, 2010
    Assignee: Broadcom Corporation
    Inventors: Jay Proano, Howard Baumer, Chung-Jue Chen, Ali Ghiasi, Vasudevan Parthasarathy, Rajesh Satapathy, Linda Ying
  • Publication number: 20100014573
    Abstract: A search engine selects initial coefficients for a receive equalizer. The search engine may be incorporated into a communication receiver that includes a decision feedback equalizer and clock and data recovery circuit. Here, the search engine may initialize various adaptation loops that may control the operation of, for example, a decision feedback equalizer, a clock and data recovery circuit and a continuous time filter. The receiver may include an analog-to-digital converter that is used to generate soft decision data for some of the adaptation loops.
    Type: Application
    Filed: October 1, 2009
    Publication date: January 21, 2010
    Applicant: Broadcom Corporation
    Inventors: Afshin Momtaz, Rajesh Satapathy, Chung-Jue Chen
  • Patent number: 7630466
    Abstract: A search engine selects initial coefficients for a receive equalizer. The search engine may be incorporated into a communication receiver that includes a decision feedback equalizer and clock and data recovery circuit. Here, the search engine may initialize various adaptation loops that may control the operation of, for example, a decision feedback equalizer, a clock and data recovery circuit and a continuous time filter. The receiver may include an analog-to-digital converter that is used to generate soft decision data for some of the adaptation loops.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: December 8, 2009
    Assignee: Broadcom Corporation
    Inventors: Afshin Momtaz, Rajesh Satapathy, Chung-Jue Chen
  • Patent number: 7492783
    Abstract: Certain embodiments of the invention may be found in a method and system for operating ports in port bypass controllers through LIPf7 origination detection and LIPf8 suppression, which may be utilized, for example, in storage systems. Aspects of the method may comprise receiving a data stream at a receive port Rx(n) of a port bypass controller, where n is an integer indexing a port in the port bypass controller. LIPf8 primitives in the received data stream may be suppressed at the receive port Rx(n) and LIPf7 primitives inserted in place of at least a portion of the suppressed LIPf8 primitives.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: February 17, 2009
    Assignee: Broadcom Corporation
    Inventors: Chung-Jue Chen, Ali Ghiasi, Jay Proano, Rajesh Satapathy, Steve Thomas
  • Patent number: 7451362
    Abstract: Certain aspects of the method may comprise receiving via a first port of the port bypass controller, a data stream comprising at least one known bit pattern. Upon locking onto at least a portion of the known bit pattern in the received data stream, a bit error rate may be generated based on a bit-by-bit comparison of at least a portion of the data stream received after locking occurs. At least a portion of the data stream may be compared with a corresponding portion of expected data. The bit error rate may be calculated based on results from comparing at least a portion of the data stream with a corresponding portion of the expected data. The known bit pattern may be internally generated within the port bypass controller or it may be externally generated by a host system.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: November 11, 2008
    Assignee: Broadcom Corporation
    Inventors: Chung-Jue Chen, Ali Ghiasi, Jay Proano, Rajesh Satapathy, Steve Thomas
  • Publication number: 20080212665
    Abstract: A system is presented that monitors the quality of a communications channel with mirror receivers. A first receiver and a second receiver, coupled in parallel with the first receiver, receive a data signal transmitted over the communications channel. The second receiver generates an output signal. A signal integrity (SI) processor manipulates the output signal in order to determine the quality of the communications channel. The SI processor samples a phase-shifted version of the output signal, which has a phase shifted relative to a zero reference phase, and analyzes the phase-shifted version of the output signal for bit errors. In an embodiment, the SI processor manipulates the output signal to extract an eye diagram indicative of the quality of the communications channel. The SI processor non-intrusively determines the quality of the communications channel using the second receiver.
    Type: Application
    Filed: February 15, 2008
    Publication date: September 4, 2008
    Applicant: Broadcom Corporation
    Inventors: Jay Proano, Howard Baumer, Chung-Jue Chen, Ali Ghiasi, Vasudevan Parthasarathy, Rajesh Satapathy, Linda Ying
  • Patent number: 7339986
    Abstract: A method is presented that monitors the quality of a communications channel. The method includes receiving a data signal and establishing a zero reference phase of the received data signal. The method further includes generating a phase-shifted data signal by phase shifting the received data signal relative to the zero reference phase, and sampling the phase-shifted data signal for one or more phase-shift positions. A zero reference phase is reestablished between sampling at each of the phase-shift positions. The method also includes detecting bit errors in the phase-shifted data signal at each of the phase-shift positions in order to provide a communications channel quality measurement. In an embodiment, the method includes generating an eye diagram according to a count of detected bit errors relative to a count of detected bits. The eye diagram characterizes the quality of the communications channel.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: March 4, 2008
    Assignee: Broadcom Corporation
    Inventors: Jay Proano, Howard Baumer, Chung-Jue Chen, Ali Ghiasi, Vasudevan Parthasarathy, Rajesh Satapathy, Linda Ying
  • Patent number: 7333537
    Abstract: A system is presented that monitors the quality of a communications channel with mirror receivers. A first receiver and a second receiver, coupled in parallel with the first receiver, receive a data signal transmitted over the communications channel. The second receiver generates an output signal. A signal integrity (SI) processor manipulates the output signal in order to determine the quality of the communications channel. The SI processor samples a phase-shifted version of the output signal, which has a phase shifted relative to a zero reference phase, and analyzes the phase-shifted version of the output signal for bit errors. In an embodiment, the SI processor manipulates the output signal to extract an eye diagram indicative of the quality of the communications channel. The SI processor non-intrusively determines the quality of the communications channel using the second receiver.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: February 19, 2008
    Assignee: Broadcom Corporation
    Inventors: Jay Proano, Howard Baumer, Chung-Jue Chen, Ali Ghiasi, Vasudevan Parthasarathy, Rajesh Satapathy, Linda Ying
  • Publication number: 20070110148
    Abstract: A search engine selects initial coefficients for a receive equalizer. The search engine may be incorporated into a communication receiver that includes a decision feedback equalizer and clock and data recovery circuit. Here, the search engine may initialize various adaptation loops that may control the operation of, for example, a decision feedback equalizer, a clock and data recovery circuit and a continuous time filter. The receiver may include an analog-to-digital converter that is used to generate soft decision data for some of the adaptation loops.
    Type: Application
    Filed: November 15, 2005
    Publication date: May 17, 2007
    Inventors: Afshin Momtaz, Rajesh Satapathy, Chung-Jue Chen
  • Publication number: 20070110199
    Abstract: A communication receiver includes a decision feedback equalizer and clock and data recovery circuit. Various adaptation loops may control the operation of the decision feedback equalizer, the clock and data recovery circuit, a continuous time filter, a threshold adjust circuit, and an analog-to-digital clock that is used to generate soft decision data for some of the adaptation loops.
    Type: Application
    Filed: December 2, 2005
    Publication date: May 17, 2007
    Inventors: Afshin Momtaz, Chung-Jue Chen, Hong Chen, Vasudevan Parthasarathy, Rajesh Satapathy
  • Publication number: 20050188284
    Abstract: A method is presented that monitors the quality of a communications channel. The method includes receiving a data signal and establishing a zero reference phase of the received data signal. The method further includes generating a phase-shifted data signal by phase shifting the received data signal relative to the zero reference phase, and sampling the phase-shifted data signal for one or more phase-shift positions. A zero reference phase is reestablished between sampling at each of the phase-shift positions. The method also includes detecting bit errors in the phase-shifted data signal at each of the phase-shift positions in order to provide a communications channel quality measurement. In an embodiment, the method includes generating an eye diagram according to a count of detected bit errors relative to a count of detected bits. The eye diagram characterizes the quality of the communications channel.
    Type: Application
    Filed: January 30, 2004
    Publication date: August 25, 2005
    Inventors: Jay Proano, Howard Baumer, Chung-Jue Chen, Ali Ghiasi, Vasudevan Parthasarathy, Rajesh Satapathy, Linda Ying
  • Publication number: 20050171994
    Abstract: A system is presented that monitors the quality of a communications channel with mirror receivers. A first receiver and a second receiver, coupled in parallel with the first receiver, receive a data signal transmitted over the communications channel. The second receiver generates an output signal. A signal integrity (SI) processor manipulates the output signal in order to determine the quality of the communications channel. The SI processor samples a phase-shifted version of the output signal, which has a phase shifted relative to a zero reference phase, and analyzes the phase-shifted version of the output signal for bit errors. In an embodiment, the SI processor manipulates the output signal to extract an eye diagram indicative of the quality of the communications channel. The SI processor non-intrusively determines the quality of the communications channel using the second receiver.
    Type: Application
    Filed: January 30, 2004
    Publication date: August 4, 2005
    Inventors: Jay Proano, Howard Baumer, Chung-Jue Chen, Ali Ghiasi, Vasudevan Parthasarathy, Rajesh Satapathy, Linda Ying
  • Publication number: 20050132258
    Abstract: Certain aspects of the method may comprise receiving via a first port of the port bypass controller, a data stream comprising at least one known bit pattern. Upon locking onto at least a portion of the known bit pattern in the received data stream, a bit error rate may be generated based on a bit-by-bit comparison of at least a portion of the data stream received after locking occurs. At least a portion of the data stream may be compared with a corresponding portion of expected data. The bit error rate may be calculated based on results from comparing at least a portion of the data stream with a corresponding portion of the expected data. The known bit pattern may be internally generated within the port bypass controller or it may be externally generated by a host system.
    Type: Application
    Filed: February 13, 2004
    Publication date: June 16, 2005
    Inventors: Chung-Jue Chen, Ali Ghiasi, Jay Proano, Rajesh Satapathy, Steve Thomas
  • Publication number: 20050131987
    Abstract: Certain embodiments of the invention may be found in a method and system for handling data in port bypass controllers for storage systems and may comprise receiving a data stream from a receive port bypass controller's port and buffering at least a portion of the received data stream in at least one EFIFO buffer integrated within the port bypass controller. A data rate or frequency of the received data stream may be changed by inserting at least one extended fill word in the buffered portion of the received data stream or by deleting at least one fill word from the received data stream buffered in the EFIFO buffer. The extended fill word may comprise a loop initialization primitive (LIP), a loop port bypass (LPB), a loop port enable (LPE), a not operation state (NOS), an offline state (OLS), a link reset response (LRR) and/or a link reset (LR).
    Type: Application
    Filed: February 13, 2004
    Publication date: June 16, 2005
    Inventors: Chung-Jue Chen, Ali Ghiasi, Jay Proano, Rajesh Satapathy, Steve Thomas
  • Publication number: 20050129057
    Abstract: Certain embodiments of the invention may be found in a method and system for operating ports in port bypass controllers through LIPf7 origination detection and LIPf8 suppression, which may be utilized, for example, in storage systems. Aspects of the method may comprise receiving a data stream at a receive port Rx(n) of a port bypass controller, where n is an integer indexing a port in the port bypass controller. LIPf8 primitives in the received data stream may be suppressed at the receive port Rx(n) and LIPf7 primitives inserted in place of at least a portion of the suppressed LIPf8 primitives.
    Type: Application
    Filed: February 13, 2004
    Publication date: June 16, 2005
    Inventors: Chung-Jue Chen, Ali Ghiasi, Jay Proano, Rajesh Satapathy, Steve Thomas