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).

  • Patent number: 10013371
    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: November 22, 2016
    Date of Patent: July 3, 2018
    Assignee: Google LLC
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 9727458
    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: Grant
    Filed: September 14, 2012
    Date of Patent: August 8, 2017
    Assignee: Google Inc.
    Inventors: David T. Wang, Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, Frederick Daniel Weber
  • Patent number: 9632929
    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: Grant
    Filed: February 8, 2007
    Date of Patent: April 25, 2017
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20170075831
    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: November 22, 2016
    Publication date: March 16, 2017
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 9542352
    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 interface the memory circuits and the system for reducing command scheduling constraints of the memory circuits.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: January 10, 2017
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 9542353
    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 interface the memory circuits and the system for reducing command scheduling constraints of the memory circuits.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: January 10, 2017
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 9507739
    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 26, 2015
    Date of Patent: November 29, 2016
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20160048466
    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: October 26, 2015
    Publication date: February 18, 2016
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 9171585
    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: November 26, 2013
    Date of Patent: October 27, 2015
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastien Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 9047976
    Abstract: A system and method are provided. In use, at least one of a plurality of memory circuits is identified. In association with the at least one memory circuit, a power saving operation is performed and the communication of a signal thereto is delayed.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: June 2, 2015
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 8972673
    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: September 14, 2012
    Date of Patent: March 3, 2015
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Michael John Sebastian Smith, David T. Wang
  • Patent number: 8949519
    Abstract: A system and method are provided for simulating an aspect of a memory circuit. Included is an interface circuit that is in communication with a plurality 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 with at least one aspect that is different from at least one aspect of at least one of the plurality of memory circuits. In accordance with various embodiments, such aspect may include a signal, a capacity, a timing, and/or a logical interface.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: February 3, 2015
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 8868829
    Abstract: A method includes presenting multiple memory circuits to a system as a virtual memory circuit having at least one characteristic that is different from a corresponding characteristic of one of the physical memory circuits; receiving, at an interface circuit, a first command issued from the system to the virtual memory circuit; and in response to receiving the first command, 1) directing a copy of the first command to a first physical memory circuit of the multiple physical memory circuits, and 2) performing a power-saving operation on at least one other physical memory circuit of the multiple physical memory circuits.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: October 21, 2014
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 8819356
    Abstract: An interface circuit that is configured to receive a first read command from a memory controller to read first data stored in a first memory circuit and a second read command to read second data that is stored in a second memory circuit, and transmit the first data and the second data to the memory controller across a data bus without a delay on the data bus between the first data and the second data.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 26, 2014
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, David T. Wang
  • Patent number: 8811065
    Abstract: Large capacity memory systems are constructed using multiple groups of memory integrated circuits or chips. The memory system includes one or more interface circuits for interfacing between the multiple groups of memory integrated circuits and a memory controller. The interface circuit may detect and/or recover failed data using error-checking information stored in a memory integrated circuit.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 19, 2014
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Michael John Sebastian Smith, David T. Wang
  • Patent number: 8797779
    Abstract: A memory module, which includes at least one memory stack, comprises a plurality of DRAM integrated circuits and an interface circuit. The interface circuit interfaces the memory stack to a host system so as to operate the memory stack as a single DRAM integrated circuit. In other embodiments, a memory module includes at least one memory stack and a buffer integrated circuit. The buffer integrated circuit, coupled to a host system, interfaces the memory stack to the host system so to operate the memory stack as at least two DRAM integrated circuits. In yet other embodiments, the buffer circuit interfaces the memory stack to the host system for transforming one or more physical parameters between the DRAM integrated circuits and the host system.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 5, 2014
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael J. S. Smith, David T. Wang, Frederick Daniel Weber
  • Publication number: 20140192583
    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: November 26, 2013
    Publication date: July 10, 2014
    Inventors: Suresh Natarajan Rajan, Keith R. Schakel, Michael John Sebastien Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 8773937
    Abstract: An apparatus includes multiple first memory circuits, in which the multiple first memory circuits are positioned on at least one dual in-line memory module (DIMM). The apparatus includes an interface circuit operable to interface the first memory circuits with a system; present the first memory circuits to the system as one or more simulated second memory circuits; transmit, in response to receiving a first refresh control signal sent from the system to the one or more simulated memory circuits, multiple second refresh control signals to the first memory circuits; and apply a respective delay to each second refresh control signal transmitted to a corresponding first memory circuit. Each simulated second memory circuit has a corresponding second memory capacity that is greater than a first memory capacity of at least one of the first memory circuits.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: July 8, 2014
    Assignee: Google Inc.
    Inventors: Keith R. Schakel, Suresh Natarajan Rajan, Michael John Sebastian Smith, David T. Wang, Frederick Daniel Weber
  • Patent number: 8760936
    Abstract: A system is provided for multi-rank, partial-width memory modules. A memory controller is provided. Additionally, a memory bus is provided. Further, a memory module with a plurality of ranks of memory circuits is provided, the memory module including a first number of data pins that is less than a second number of data pins of the memory bus.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: June 24, 2014
    Assignee: Google Inc.
    Inventors: Suresh Natarajan Rajan, Michael John Smith
  • Patent number: 8762675
    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: September 14, 2012
    Date of Patent: June 24, 2014
    Assignee: Google Inc.
    Inventors: David T. Wang, Suresh Natarajan Rajan