Patents by Inventor Raghukiran Sreeramaneni

Raghukiran Sreeramaneni 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: 7573288
    Abstract: Systems and methods for dynamically adjusting operation of a circuit within a semiconductor device are described herein. At least some illustrative embodiments include a system that includes a matching circuit including a first plurality of switching devices coupled to each other in parallel and not coupled in parallel to a resistive device, a driver circuit including a plurality of driver devices (the driver circuit adjusted based upon which of the switching devices are enabled), and processing logic that couples to the matching and driver circuits. The processing logic derives a binary value indicative of which of the switching devices are to be enabled, the binary value reflecting one or more process corners associated with the switching devices, and not reflecting one or more process corners associated with the resistive device. The processing logic further maps the binary value to a control value used to adjust the driver circuit.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: August 11, 2009
    Assignee: Micron Technology, Inc.
    Inventors: Sujeet Ayyapureddi, Raghukiran Sreeramaneni
  • Publication number: 20090108867
    Abstract: A method of operating an electronic device having an output driver with on die termination legs ODT, and non-ODT legs, includes the step of selectively tri-stating tuning transistors (ZQ trim devices) in the legs as a function of the operational state of the output driver. The tri-stating step is performed such that when a leg is not being utilized, the tuning transistors in the unused leg are placed in a tri-state. For example, during an ODT mode of the output driver, the tuning transistors in the non-ODT legs are tri-stated. During a READ mode of the output driver, the tuning transistors in the ODT legs are tri-stated. During a HiZ mode of the output driver, the tuning transistors in both legs are tri-stated. Tri-stating the tuning transistors in the unused output driver legs can reduce DQ pin capacitance by a total of approximately (Cgd+Cgs+Cgb).
    Type: Application
    Filed: December 22, 2008
    Publication date: April 30, 2009
    Inventor: Raghukiran Sreeramaneni
  • Publication number: 20090072855
    Abstract: Systems and methods for dynamically adjusting operation of a circuit within a semiconductor device are described herein. At least some illustrative embodiments include a system that includes a matching circuit including a first plurality of switching devices coupled to each other in parallel and not coupled in parallel to a resistive device, a driver circuit including a plurality of driver devices (the driver circuit adjusted based upon which of the switching devices are enabled), and processing logic that couples to the matching and driver circuits. The processing logic derives a binary value indicative of which of the switching devices are to be enabled, the binary value reflecting one or more process comers associated with the switching devices, and not reflecting one or more process comers associated with the resistive device. The processing logic further maps the binary value to a control value used to adjust the driver circuit.
    Type: Application
    Filed: September 17, 2007
    Publication date: March 19, 2009
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Sujeet AYYAPUREDDI, Raghukiran SREERAMANENI
  • Patent number: 7482833
    Abstract: A method of operating an electronic device having an output driver with on die termination legs ODT, and non-ODT legs, includes the step of selectively tri-stating tuning transistors (ZQ trim devices) in the legs as a function of the operational state of the output driver. The tri-stating step is performed such that when a leg is not being utilized, the tuning transistors in the unused leg are placed in a tri-state. For example, during an ODT mode of the output driver, the tuning transistors in the non-ODT legs are tri-stated. During a READ mode of the output driver, the tuning transistors in the ODT legs are tri-stated. During a HiZ mode of the output driver, the tuning transistors in both legs are tri-stated. Tri-stating the tuning transistors in the unused output driver legs can reduce DQ pin capacitance by a total of approximately (Cgd+Cgs+Cgb).
    Type: Grant
    Filed: April 21, 2007
    Date of Patent: January 27, 2009
    Assignee: Micron Technology, Inc.
    Inventor: Raghukiran Sreeramaneni
  • Publication number: 20080258768
    Abstract: A method of operating an electronic device having an output driver with on die termination legs ODT, and non-ODT legs, includes the step of selectively tri-stating tuning transistors (ZQ trim devices) in the legs as a function of the operational state of the output driver. The tri-stating step is performed such that when a leg is not being utilized, the tuning transistors in the unused leg are placed in a tri-state. For example, during an ODT mode of the output driver, the tuning transistors in the non-ODT legs are tri-stated. During a READ mode of the output driver, the tuning transistors in the ODT legs are tri-stated. During a HiZ mode of the output driver, the tuning transistors in both legs are tri-stated. Tri-stating the tuning transistors in the unused output driver legs can reduce DQ pin capacitance by a total of approximately (Cgd+Cgs+Cgb).
    Type: Application
    Filed: April 21, 2007
    Publication date: October 23, 2008
    Inventor: Raghukiran Sreeramaneni