Patents by Inventor Phani Raghavendra Yasasvi Gangavarapu

Phani Raghavendra Yasasvi Gangavarapu 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: 11315637
    Abstract: Aspects of a storage device including a memory and controller are provided which allow for erase voltages applied during erase operations to be adaptively changed at elevated temperatures to reduce erase time and prevent erase failures. In response to detecting a lower temperature of the memory, the controller applies a first erase voltage to cells in a block of a die, and in response to detecting a higher temperature of the memory, the controller applies a second erase voltage larger than the first erase voltage to the cells in the block of the die. The controller may apply the different erase voltages depending on whether the temperature of the die falls within respective temperature ranges or meets a respective temperature threshold, which may change for different dies. As a result, successful erase operations at higher temperatures may be achieved.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: April 26, 2022
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Kranthi Kumar Vaidyula, Amiya Banerjee, Phani Raghavendra Yasasvi Gangavarapu
  • Patent number: 11282580
    Abstract: A memory controller includes, in one embodiment, a memory interface and a controller circuit. The memory interface is configured to interface with a memory having a plurality of wordlines. The controller circuit is configured to program, with foggy-fine programming, a first portion of the plurality of wordlines to store first program data, program, with the foggy-fine programming, one or more wordlines of the plurality of wordlines in a non-fine state, the one or more wordlines neighboring the first portion, and program, with the foggy-fine programming, a second portion of the plurality of wordlines to store second program data, the second portion neighboring the one or more wordlines.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: March 22, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Mayank Gupta, Phani Raghavendra Yasasvi Gangavarapu, Arun Balakrishnan
  • Publication number: 20210383873
    Abstract: Aspects of a storage device including a memory and controller are provided which allow for erase voltages applied during erase operations to be adaptively changed at elevated temperatures to reduce erase time and prevent erase failures. In response to detecting a lower temperature of the memory, the controller applies a first erase voltage to cells in a block of a die, and in response to detecting a higher temperature of the memory, the controller applies a second erase voltage larger than the first erase voltage to the cells in the block of the die. The controller may apply the different erase voltages depending on whether the temperature of the die falls within respective temperature ranges or meets a respective temperature threshold, which may change for different dies. As a result, successful erase operations at higher temperatures may be achieved.
    Type: Application
    Filed: June 3, 2020
    Publication date: December 9, 2021
    Inventors: Kranthi Kumar Vaidyula, Amiya Banerjee, Phani Raghavendra Yasasvi Gangavarapu
  • Publication number: 20210375376
    Abstract: A memory controller includes, in one embodiment, a memory interface and a controller circuit. The memory interface is configured to interface with a memory having a plurality of wordlines. The controller circuit is configured to program, with foggy-fine programming, a first portion of the plurality of wordlines to store first program data, program, with the foggy-fine programming, one or more wordlines of the plurality of wordlines in a non-fine state, the one or more wordlines neighboring the first portion, and program, with the foggy-fine programming, a second portion of the plurality of wordlines to store second program data, the second portion neighboring the one or more wordlines.
    Type: Application
    Filed: May 29, 2020
    Publication date: December 2, 2021
    Inventors: Mayank Gupta, Phani Raghavendra Yasasvi Gangavarapu, Arun Balakrishnan