Patents by Inventor Woopoung Kim

Woopoung Kim 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: 8692573
    Abstract: Embodiments of a memory controller are described. This memory controller communicates signals to a memory device via a signal line, which can be a data signal line or a command/address signal line. Termination of the signal line is divided between an external impedance outside of the memory controller and an internal impedance within the memory controller. The memory controller does not activate the external impedance prior to communicating the signals and, therefore, does not deactivate the external impedance after communicating the signals. The internal impedance of the memory controller can be enabled or disabled in order to reduce interface power consumption. Moreover, the internal impedance may be implemented using a passive component, an active component or both. For example, the internal impedance may include either or both an on-die termination and at least one driver.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: April 8, 2014
    Assignee: Rambus Inc.
    Inventors: Kyung Suk Oh, Woopoung Kim, Huy M. Nguyen, Eugene C. Ho
  • Patent number: 8588280
    Abstract: Embodiments of a system that communicates bidirectional data between two devices via shared links is described. In this system, data is transmitted on the shared links by one of the devices using single-ended drivers, and corresponding symbols are received on the shared links by the other device using differential comparison circuits. The data may be encoded as a series of parallel codewords prior to transmission. Each shared link may communicate a respective symbol in each codeword, which can have one of two possible logical values (e.g., a logic 0 or a logic 1). The corresponding symbols received by the other device may comprise a parallel symbol set, and each of the differential comparison circuits may compare symbols received on pairs of the shared links. A decoder in the other device may decode a respective parallel symbol set from the outputs of the differential comparison circuits to recover the encoded data.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: November 19, 2013
    Assignee: Rambus Inc.
    Inventors: Kyung Suk Oh, John Wilson, Frederick A. Ware, WooPoung Kim, Jade M. Kizer, Brian S. Leibowitz, Lei Luo, John Cronan Eble
  • Publication number: 20120081146
    Abstract: Embodiments of a memory controller are described. This memory controller communicates signals to a memory device via a signal line, which can be a data signal line or a command/address signal line. Termination of the signal line is divided between an external impedance outside of the memory controller and an internal impedance within the memory controller. The memory controller does not activate the external impedance prior to communicating the signals and, therefore, does not deactivate the external impedance after communicating the signals. The internal impedance of the memory controller can be enabled or disabled in order to reduce interface power consumption. Moreover, the internal impedance may be implemented using a passive component, an active component or both. For example, the internal impedance may include either or both an on-die termination and at least one driver.
    Type: Application
    Filed: December 9, 2011
    Publication date: April 5, 2012
    Applicant: RAMBUS INC.
    Inventors: Kyung Suk Oh, Woopoung Kim, Huy M. Nguyen, Eugene C. Ho
  • Patent number: 8130010
    Abstract: Embodiments of a memory controller are described. This memory controller communicates signals to a memory device via a signal line, which can be a data signal line or a command/address signal line. Termination of the signal line is divided between an external impedance outside of the memory controller and an internal impedance within the memory controller. The memory controller does not activate the external impedance prior to communicating the signals and, therefore, does not deactivate the external impedance after communicating the signals. The internal impedance of the memory controller can be enabled or disabled in order to reduce interface power consumption. Moreover, the internal impedance may be implemented using a passive component, an active component or both. For example, the internal impedance may include either or both an on-die termination and at least one driver.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: March 6, 2012
    Assignee: Rambus Inc.
    Inventors: Kyung Suk Oh, Woopoung Kim, Huy M. Nguyen, Eugene C. Ho
  • Publication number: 20110128040
    Abstract: Embodiments of a memory controller are described. This memory controller communicates signals to a memory device via a signal line, which can be a data signal line or a command/address signal line. Termination of the signal line is divided between an external impedance outside of the memory controller and an internal impedance within the memory controller. The memory controller does not activate the external impedance prior to communicating the signals and, therefore, does not deactivate the external impedance after communicating the signals. The internal impedance of the memory controller can be enabled or disabled in order to reduce interface power consumption. Moreover, the internal impedance may be implemented using a passive component, an active component or both. For example, the internal impedance may include either or both an on-die termination and at least one driver.
    Type: Application
    Filed: February 7, 2011
    Publication date: June 2, 2011
    Applicant: RAMBUS INC.
    Inventors: Kyung Suk Oh, Woopoung Kim, Huy M. Nguyen, Eugene C. Ho
  • Patent number: 7915912
    Abstract: Embodiments of a memory controller are described. This memory controller communicates signals to a memory device via a signal line, which can be a data signal line or a command/address signal line. Termination of the signal line is divided between an external impedance outside of the memory controller and an internal impedance within the memory controller. The memory controller does not activate the external impedance prior to communicating the signals and, therefore, does not deactivate the external impedance after communicating the signals. The internal impedance of the memory controller can be enabled or disabled in order to reduce interface power consumption. Moreover, the internal impedance may be implemented using a passive component, an active component or both. For example, the internal impedance may include either or both an on-die termination and at least one driver.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: March 29, 2011
    Assignee: Rambus Inc.
    Inventors: Kyung Suk Oh, Woopoung Kim, Huy M. Nguyen, Eugene C. Ho
  • Publication number: 20100309964
    Abstract: Embodiments of a system that communicates bidirectional data between two devices via shared links is described. In this system, data is transmitted on the shared links by one of the devices using single-ended drivers, and corresponding symbols are received on the shared links by the other device using differential comparison circuits. The data may be encoded as a series of parallel codewords prior to transmission. Each shared link may communicate a respective symbol in each codeword, which can have one of two possible logical values (e.g., a logic 0 or a logic 1). The corresponding symbols received by the other device may comprise a parallel symbol set, and each of the differential comparison circuits may compare symbols received on pairs of the shared links. A decoder in the other device may decode a respective parallel symbol set from the outputs of the differential comparison circuits to recover the encoded data.
    Type: Application
    Filed: December 19, 2008
    Publication date: December 9, 2010
    Applicant: RAMBUS INC.
    Inventors: Kyung Suk Oh, John Wilson, Frederick Ware, WooPoung Kim, Jade M. Kizer, Brian S. Leibowitz, Lei Luo, John Cronan Eble
  • Publication number: 20100073023
    Abstract: Embodiments of a memory controller are described. This memory controller communicates signals to a memory device via a signal line, which can be a data signal line or a command/address signal line. Termination of the signal line is divided between an external impedance outside of the memory controller and an internal impedance within the memory controller. The memory controller does not activate the external impedance prior to communicating the signals and, therefore, does not deactivate the external impedance after communicating the signals. The internal impedance of the memory controller can be enabled or disabled in order to reduce interface power consumption. Moreover, the internal impedance may be implemented using a passive component, an active component or both. For example, the internal impedance may include either or both an on-die termination and at least one driver.
    Type: Application
    Filed: September 9, 2009
    Publication date: March 25, 2010
    Applicant: RAMBUS INC.
    Inventors: Kyung Suk Oh, Woopoung Kim, Huy M. Nguyen, Eugene C. Ho
  • Publication number: 20020158305
    Abstract: Organic substrates having integrated components and systems and methods for designing and optimizing integrated components for substrates are provided. One embodiment is a computer program embodied in a computer-readable medium for optimizing the design of an integrated inductor in a substrate adapted for use in integrated circuits.
    Type: Application
    Filed: November 26, 2001
    Publication date: October 31, 2002
    Inventors: Sidharth Dalmia, Sung Hwan Min, Seock Hee Lee, Venkatesh Sundaram, Farrokh Ayazi, George E. White, Madhavan Swaminathan, Woopoung Kim