Patents by Inventor Suresh Natarajan Rajan

Suresh Natarajan Rajan 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).

  • Publication number: 20130103897
    Abstract: A memory circuit system and method are provided. An interface circuit is capable of communication with a plurality of memory circuits and a system. In use, the interface circuit is operable to translate an address associated with a command communicated between the system and the memory circuits.
    Type: Application
    Filed: September 14, 2012
    Publication date: April 25, 2013
    Applicant: GOOGLE INC.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20130103377
    Abstract: An apparatus and method are provided for communicating with a plurality of physical memory circuits. In use, at least one virtual memory circuit is simulated where at least one aspect (e.g. power-related aspect, etc.) of such virtual memory circuit(s) is different from at least one aspect of at least one of the physical memory circuits. Further, in various embodiments, such simulation may be carried out by a system (or component thereof), an interface circuit, etc.
    Type: Application
    Filed: September 14, 2012
    Publication date: April 25, 2013
    Applicant: GOOGLE INC.
    Inventors: Suresh Natarajan Rajan, Michael John Sebastian Smith, David T. Wang
  • Patent number: 8407412
    Abstract: An apparatus and method are provided for communicating with a plurality of physical memory circuits. In use, at least one virtual memory circuit is simulated where at least one aspect (e.g. power-related aspect, etc.) of such virtual memory circuit(s) is different from at least one aspect of at least one of the physical memory circuits. Further, in various embodiments, such simulation may be carried out by a system (or component thereof), an interface circuit, etc.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: March 26, 2013
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Michael John Smith, David T. Wang
  • Patent number: 8386833
    Abstract: One embodiment of the present invention sets forth a memory module that includes at least one memory chip, and an intelligent chip coupled to the at least one memory chip and a memory controller, where the intelligent chip is configured to implement at least a part of a RAS feature. The disclosed architecture allows one or more RAS features to be implemented locally to the memory module using one or more intelligent register chips, one or more intelligent buffer chips, or some combination thereof. Such an approach not only increases the effectiveness of certain RAS features that were available in prior art systems, but also enables the implementation of certain RAS features that were not available in prior art systems.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: February 26, 2013
    Assignee: Google Inc.
    Inventors: Michael J. S. Smith, Suresh Natarajan Rajan
  • Patent number: 8386722
    Abstract: One embodiment of the present invention sets forth an interface circuit configured to combine time staggered data bursts returned by multiple memory devices into a larger contiguous data burst. As a result, an accurate timing reference for data transmission that retains the use of data (DQ) and data strobe (DQS) signals in an infrastructure-compatible system while eliminating the cost of the idle cycles required for data bus turnarounds to switch from reading from one memory device to reading from another memory device, or from writing to one memory device to writing to another memory device may be obtained, thereby increasing memory system bandwidth relative to the prior art approaches.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: February 26, 2013
    Assignee: Google Inc.
    Inventors: David T. Wang, Suresh Natarajan Rajan
  • Patent number: 8359187
    Abstract: A system and method are provided for simulating a different number of memory circuits. Included is an interface circuit in communication with a first number of memory circuits and a system. Such interface circuit is operable to interface the memory circuits and the system for simulating at least one memory circuit of a second number. Further, the interface circuit interfaces a majority of address or control signals of the memory circuits.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: January 22, 2013
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20130007399
    Abstract: A system and method are provided for adjusting the timing of signals associated with a memory system. A memory controller is provided. Additionally, at least one memory module is provided. Further, at least one interface circuit is provided, the interface circuit capable of adjusting timing of signals associated with one or more of the memory controller and the at least one memory module.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 3, 2013
    Applicant: GOOGLE INC.
    Inventors: Michael John Sebastian Smith, Daniel L. Rosenband, David T. Wang, Suresh Natarajan Rajan
  • Patent number: 8340953
    Abstract: A system and method are provided including a component in communication with a plurality of memory circuits and a system. The component is operable to interface the memory circuits an the system for simulating at least one memory circuit with at least one aspect that is different from at least one aspect of at least one of the plurality of memory circuits. The component is further operable to perform a power saving operation.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: December 25, 2012
    Assignee: Google, Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 8335894
    Abstract: An interface circuit that emulates a memory circuit having a first organization using a memory circuit having a second organization, wherein the second organization includes a number of banks, a number of rows, a number of columns, and a number of bits per column.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: December 18, 2012
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, David T. Wang
  • Patent number: 8327104
    Abstract: A system and method are provided for adjusting the timing of signals associated with a memory system. A memory controller is provided. Additionally, at least one memory module is provided. Further, at least one interface circuit is provided, the interface circuit capable of adjusting timing of signals associated with one or more of the memory controller and the at least one memory module.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: December 4, 2012
    Assignee: Google Inc.
    Inventors: Michael John Sebastian Smith, Daniel L. Rosenband, David T. Wang, Suresh Natarajan Rajan
  • Patent number: 8279690
    Abstract: A system is provided for high-speed communication between a memory controller and a plurality of memory devices. A memory controller, and a plurality of memory devices are provided. Additionally, at least one channel is included for providing electrical communication between the memory controller and the plurality of memory devices, an impedance of the channel being at least partially controlled using High Density Interconnect (HDI) technology.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: October 2, 2012
    Assignee: Google Inc.
    Inventors: Min Wang, Philip Arnold Ferolito, Suresh Natarajan Rajan, Michael John Sebastian Smith
  • Patent number: 8280714
    Abstract: A system and method are provided including an interface circuit in communication with a plurality of memory circuits and a system. The interface circuit is operable to interface the plurality of memory circuits and the system for simulating at leas one memory circuit with at least one aspect that is different from at least one aspect of at least one of the plurality of memory circuits. The interface circuit is further operable to control refreshing of the plurality of memory circuits.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: October 2, 2012
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20120233395
    Abstract: One embodiment of the present invention sets forth an abstracted memory subsystem comprising abstracted memories, which each may be configured to present memory related characteristics onto a memory system interface. The characteristics can be presented on the memory system interface via logic signals or protocol exchanges, and the characteristics may include any one or more of, an address space, a protocol, a memory type, a power management rule, a number of pipeline stages, a number of banks, a mapping to physical banks, a number of ranks, a timing characteristic, an address decoding option, a bus turnaround time parameter, an additional signal assertion, a sub-rank, a number of planes, or other memory-related characteristics. Some embodiments include an intelligent register device and/or, an intelligent buffer device. One advantage of the disclosed subsystem is that memory performance may be optimized regardless of the specific protocols used by the underlying memory hardware devices.
    Type: Application
    Filed: May 17, 2012
    Publication date: September 13, 2012
    Applicant: GOOGLE INC.
    Inventors: Michael J. S. Smith, Suresh Natarajan Rajan, David T. Wang
  • Publication number: 20120226924
    Abstract: A memory circuit power management system and method are provided. An interface circuit is in communication with a plurality of memory circuits and a system. In use, the interface circuit is operable to perform a power management operation in association with only a portion of the memory circuits.
    Type: Application
    Filed: May 14, 2012
    Publication date: September 6, 2012
    Applicant: GOOGLE INC.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 8244971
    Abstract: A memory circuit system and method are provided in the context of various embodiments. In one embodiment, an interface circuit remains in communication with a plurality of memory circuits and a system. The interface circuit is operable to interface the memory circuits and the system for performing various functionality (e.g. power management, simulation/emulation, etc.).
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 14, 2012
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20120201088
    Abstract: A memory circuit system and method are provided in the context of various embodiments. In one embodiment, an interface circuit remains in communication with a plurality of memory circuits and a system. The interface circuit is operable to interface the memory circuits and the system for performing various functionality (e.g. power management, simulation/emulation, etc.).
    Type: Application
    Filed: February 6, 2012
    Publication date: August 9, 2012
    Applicant: GOOGLE INC.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 8213205
    Abstract: Large capacity memory systems are constructed using stacked memory integrated circuits or chips. The stacked memory chips are constructed in such a way that eliminates problems such as signal integrity while still meeting current and future memory standards.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: July 3, 2012
    Assignee: Google Inc.
    Inventor: Suresh Natarajan Rajan
  • Patent number: 8209479
    Abstract: A memory circuit system and method are provided in the context of various embodiments. In one embodiment, an interface circuit remains in communication with a plurality of memory circuits and a system. The interface circuit is operable to interface the memory circuits and the system for performing various functionality (e.g. power management, simulation/emulation, etc.).
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: June 26, 2012
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20120147684
    Abstract: A memory refresh apparatus and method are operable such that in response to the receipt of a refresh control signal, a plurality of refresh control signals is sent to the memory circuits at different times.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 14, 2012
    Applicant: GOOGLE INC.
    Inventors: Keith R. Schakel, Suresh Natarajan Rajan, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20120124281
    Abstract: An apparatus and method are provided for communicating with a plurality of physical memory circuits. In use, at least one virtual memory circuit is simulated where at least one aspect (e.g. power-related aspect, etc.) of such virtual memory circuit(s) is different from at least one aspect of at least one of the physical memory circuits. Further, in various embodiments, such simulation may be carried out by a system (or component thereof), an interface circuit, etc.
    Type: Application
    Filed: January 4, 2012
    Publication date: May 17, 2012
    Applicant: Google Inc.
    Inventors: Suresh Natarajan Rajan, Michael John Sebastian Smith, David T. Wang