Patents by Inventor Yogesh Luthra

Yogesh Luthra 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: 10972101
    Abstract: Level shifters, memory systems, and level shifting methods are described. According to one arrangement, a level shifter includes an input configured to receive an input signal in a first voltage domain, an output configured to output an output signal from the level shifter in a second voltage domain different than the first voltage domain, a plurality of pull-down devices, and wherein one of the pull-down devices is coupled with the input and the output, a plurality of cross-coupled devices coupled with the pull-down devices and configured to provide transitions in the output signal as a result of transitions in the input signal, a plurality of current limiting devices coupled with the cross-coupled devices and configured to limit a flow of current from a source to the cross-coupled devices, and a plurality of dynamic devices configured to selectively provide charging current from the source to the cross-coupled devices.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: April 6, 2021
    Assignee: Micron Technology, Inc.
    Inventor: Yogesh Luthra
  • Patent number: 10937493
    Abstract: Memory systems and memory programming methods are described. According to one aspect, a memory system includes program circuitry configured to provide a program signal to a memory cell to program the memory cell from a first memory state to a second memory state, detection circuitry configured to detect the memory cell changing from the first memory state to the second memory state during the provision of the program signal to the memory cell to program the memory cell, and wherein the program circuitry is configured to alter the program signal as a result of the detection and to provide the altered program signal to the memory cell to continue to program the memory cell from the first memory state to the second memory state.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: March 2, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Makoto Kitagawa, Yogesh Luthra
  • Publication number: 20190066784
    Abstract: Memory systems and memory programming methods are described. According to one aspect, a memory system includes program circuitry configured to provide a program signal to a memory cell to program the memory cell from a first memory state to a second memory state, detection circuitry configured to detect the memory cell changing from the first memory state to the second memory state during the provision of the program signal to the memory cell to program the memory cell, and wherein the program circuitry is configured to alter the program signal as a result of the detection and to provide the altered program signal to the memory cell to continue to program the memory cell from the first memory state to the second memory state.
    Type: Application
    Filed: October 29, 2018
    Publication date: February 28, 2019
    Applicant: Micron Technology, Inc.
    Inventors: Makoto Kitagawa, Yogesh Luthra
  • Patent number: 10163514
    Abstract: Methods of operating a memory include increasing a voltage applied to a first access line from a first voltage to a second voltage higher than the first voltage while applying the first voltage to a second access line, the first access line coupled to a target memory cell of the programming operation and an unselected memory cell not targeted for the programming operation, and the second access line coupled to memory cells not targeted for the programming operation. After increasing the voltage applied to the first access line, increasing the voltage applied to the first access line from the second voltage to a third voltage higher than the second voltage and increasing a voltage applied to the second access line from the first voltage to a fourth voltage higher than the first voltage and lower than the third voltage.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: December 25, 2018
    Assignee: Micron Technology, Inc.
    Inventors: Yogesh Luthra, Kim-Fung Chan, Xiaojiang Guo
  • Patent number: 10121539
    Abstract: Memory systems and memory programming methods are described. According to one aspect, a memory system includes program circuitry configured to provide a program signal to a memory cell to program the memory cell from a first memory state to a second memory state, detection circuitry configured to detect the memory cell changing from the first memory state to the second memory state during the provision of the program signal to the memory cell to program the memory cell, and wherein the program circuitry is configured to alter the program signal as a result of the detection and to provide the altered program signal to the memory cell to continue to program the memory cell from the first memory state to the second memory state.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: November 6, 2018
    Assignee: Micron Technology, Inc.
    Inventors: Makoto Kitagawa, Yogesh Luthra
  • Publication number: 20180309446
    Abstract: Level shifters, memory systems, and level shifting methods are described. According to one arrangement, a level shifter includes an input configured to receive an input signal in a first voltage domain, an output configured to output an output signal from the level shifter in a second voltage domain different than the first voltage domain, a plurality of pull-down devices, and wherein one of the pull-down devices is coupled with the input and the output, a plurality of cross-coupled devices coupled with the pull-down devices and configured to provide transitions in the output signal as a result of transitions in the input signal, a plurality of current limiting devices coupled with the cross-coupled devices and configured to limit a flow of current from a source to the cross-coupled devices, and a plurality of dynamic devices configured to selectively provide charging current from the source to the cross-coupled devices.
    Type: Application
    Filed: June 29, 2018
    Publication date: October 25, 2018
    Applicant: Micron Technology, Inc.
    Inventor: Yogesh Luthra
  • Patent number: 10014861
    Abstract: Level shifters, memory systems, and level shifting methods are described. According to one arrangement, a level shifter includes an input configured to receive an input signal in a first voltage domain, an output configured to output an output signal from the level shifter in a second voltage domain different than the first voltage domain, a plurality of pull-down devices, and wherein one of the pull-down devices is coupled with the input and the output, a plurality of cross-coupled devices coupled with the pull-down devices and configured to provide transitions in the output signal as a result of transitions in the input signal, a plurality of current limiting devices coupled with the cross-coupled devices and configured to limit a flow of current from a source to the cross-coupled devices, and a plurality of dynamic devices configured to selectively provide charging current from the source to the cross-coupled devices.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: July 3, 2018
    Assignee: Micron Technology, Inc.
    Inventor: Yogesh Luthra
  • Publication number: 20170365344
    Abstract: Methods of operating a memory include increasing a voltage applied to a first access line from a first voltage to a second voltage higher than the first voltage while applying the first voltage to a second access line, the first access line coupled to a target memory cell of the programming operation and an unselected memory cell not targeted for the programming operation, and the second access line coupled to memory cells not targeted for the programming operation. After increasing the voltage applied to the first access line, increasing the voltage applied to the first access line from the second voltage to a third voltage higher than the second voltage and increasing a voltage applied to the second access line from the first voltage to a fourth voltage higher than the first voltage and lower than the third voltage.
    Type: Application
    Filed: August 31, 2017
    Publication date: December 21, 2017
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Yogesh Luthra, Kim-Fung Chan, Xiaojiang Guo
  • Patent number: 9805801
    Abstract: Methods of operating a memory device during a programming operation, and memory devices so configured, including increasing a voltage applied to a selected access line from a first voltage while maintaining a voltage applied to an unselected access line at the first voltage. The selected access line is connected to a control gate of a target memory cell of a string of series-connected memory cells that is targeted for programming during the programming operation and the unselected access line is connected to a control gate of a second memory cell of the string of series-connected memory cells that is untargeted for programming during the programming operation. After the voltage applied to the selected access line reaches a second voltage, the methods further include increasing the voltage applied to the unselected access line from the first voltage while increasing the voltage applied to the selected access line from the second voltage.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 31, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Yogesh Luthra, Kim-Fung Chan, Xiaojiang Guo
  • Patent number: 9799412
    Abstract: A memory includes a plurality of replacement word lines interspersed among the plurality of word lines. The memory also includes a word line control circuit configured to apply different voltages to different word lines of the plurality of word lines based on positions of the word lines, and to replace a defective word line of the plurality of word lines with a replacement word line.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: October 24, 2017
    Assignee: Sony Semiconductor Solutions Corporation
    Inventors: Makoto Kitagawa, Yogesh Luthra
  • Patent number: 9779822
    Abstract: Methods of operating a memory device during a programming operation, and memory devices so configured, including increasing a voltage applied to a selected access line from a first voltage while maintaining a voltage applied to an unselected access line at the first voltage. The selected access line is connected to a control gate of a target memory cell of a string of series-connected memory cells that is targeted for programming during the programming operation and the unselected access line is connected to a control gate of a second memory cell of the string of series-connected memory cells that is untargeted for programming during the programming operation. After the voltage applied to the selected access line reaches a second voltage, the methods further include increasing the voltage applied to the unselected access line from the first voltage while increasing the voltage applied to the selected access line from the second voltage.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 3, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Yogesh Luthra, Kim-Fung Chan, Xiaojiang Guo
  • Publication number: 20170229175
    Abstract: Memory systems and memory programming methods are described. According to one aspect, a memory system includes program circuitry configured to provide a program signal to a memory cell to program the memory cell from a first memory state to a second memory state, detection circuitry configured to detect the memory cell changing from the first memory state to the second memory state during the provision of the program signal to the memory cell to program the memory cell, and wherein the program circuitry is configured to alter the program signal as a result of the detection and to provide the altered program signal to the memory cell to continue to program the memory cell from the first memory state to the second memory state.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 10, 2017
    Applicant: Micron Technology, Inc.
    Inventors: Makoto Kitagawa, Yogesh Luthra
  • Patent number: 9666282
    Abstract: In an example, a method may include increasing a voltage applied to an unprogrammed first memory cell in a string of series-connected memory cells from a first voltage to a second voltage while a voltage applied to second memory cells in the string of series-connected memory cells is at the first voltage and increasing the voltage applied to the second memory cells from the first voltage to a pass voltage concurrently with increasing the voltage applied to the unprogrammed first memory cell from the second voltage to a program voltage.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: May 30, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Yogesh Luthra, Kim-Fung Chan, Xiaojiang Guo
  • Patent number: 9633728
    Abstract: Memory systems and memory programming methods are described. According to one aspect, a memory system includes program circuitry configured to provide a program signal to a memory cell to program the memory cell from a first memory state to a second memory state, detection circuitry configured to detect the memory cell changing from the first memory state to the second memory state during the provision of the program signal to the memory cell to program the memory cell, and wherein the program circuitry is configured to alter the program signal as a result of the detection and to provide the altered program signal to the memory cell to continue to program the memory cell from the first memory state to the second memory state.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: April 25, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Makoto Kitagawa, Yogesh Luthra
  • Patent number: 9576618
    Abstract: Memory devices, memory device operational methods, and memory device implementation methods are described. According to one arrangement, a memory device includes memory circuitry configured to store data in a plurality of different data states, temperature sensor circuitry configured to sense a temperature of the memory device and to generate an initial temperature output which is indicative of the temperature of the memory device, and conversion circuitry coupled with the temperature sensor circuitry and configured to convert the initial temperature output into a converted temperature output which is indicative of the temperature of the memory device at a selected one of a plurality of possible different temperature resolutions, and wherein the converted temperature output is utilized by the memory circuitry to implement at least one operation with respect to storage of the data.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: February 21, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Yogesh Luthra, Makoto Kitagawa
  • Publication number: 20160248424
    Abstract: Level shifters, memory systems, and level shifting methods are described. According to one arrangement, a level shifter includes an input configured to receive an input signal in a first voltage domain, an output configured to output an output signal from the level shifter in a second voltage domain different than the first voltage domain, a plurality of pull-down devices, and wherein one of the pull-down devices is coupled with the input and the output, a plurality of cross-coupled devices coupled with the pull-down devices and configured to provide transitions in the output signal as a result of transitions in the input signal, a plurality of current limiting devices coupled with the cross-coupled devices and configured to limit a flow of current from a source to the cross-coupled devices, and a plurality of dynamic devices configured to selectively provide charging current from the source to the cross-coupled devices.
    Type: Application
    Filed: May 2, 2016
    Publication date: August 25, 2016
    Applicant: Micron Technology, Inc.
    Inventor: Yogesh Luthra
  • Patent number: 9425190
    Abstract: Techniques for providing a direct injection semiconductor memory device are disclosed. In one particular exemplary embodiment, the techniques may be realized as a method for biasing a direct injection semiconductor memory device. The method may comprise applying a first voltage potential to a first N-doped region via a bit line and applying a second voltage potential to a second N-doped region via a source line. The method may also comprise applying a third voltage potential to a word line, wherein the word line is spaced apart from and capacitively coupled to a body region that is electrically floating and disposed between the first N-doped region and the second N-doped region. The method may further comprise applying a fourth voltage potential to a P-type substrate via a carrier injection line.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: August 23, 2016
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Yogesh Luthra, Serguei Okhonin, Mikhail Nagoga
  • Patent number: 9331083
    Abstract: Techniques for providing a semiconductor memory device are disclosed. In one particular exemplary embodiment, the techniques may be realized as an apparatus including a first region and a second region. The apparatus may also include a body region disposed between the first region and the second region and capacitively coupled to a plurality of word lines, wherein each of the plurality of word lines is capacitively coupled to different portions of the body region.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: May 3, 2016
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Serguei Okhonin, Viktor Koldiaev, Mikhail Nagoga, Yogesh Luthra
  • Patent number: 9331699
    Abstract: Level shifters, memory systems, and level shifting methods are described. According to one arrangement, a level shifter includes an input configured to receive an input signal in a first voltage domain, an output configured to output an output signal from the level shifter in a second voltage domain different than the first voltage domain, a plurality of pull-down devices, and wherein one of the pull-down devices is coupled with the input and the output, a plurality of cross-coupled devices coupled with the pull-down devices and configured to provide transitions in the output signal as a result of transitions in the input signal, a plurality of current limiting devices coupled with the cross-coupled devices and configured to limit a flow of current from a source to the cross-coupled devices, and a plurality of dynamic devices configured to selectively provide charging current from the source to the cross-coupled devices.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: May 3, 2016
    Assignee: Micron Technology, Inc.
    Inventor: Yogesh Luthra
  • Publication number: 20160118087
    Abstract: Memory devices, memory device operational methods, and memory device implementation methods are described. According to one arrangement, a memory device includes memory circuitry configured to store data in a plurality of different data states, temperature sensor circuitry configured to sense a temperature of the memory device and to generate an initial temperature output which is indicative of the temperature of the memory device, and conversion circuitry coupled with the temperature sensor circuitry and configured to convert the initial temperature output into a converted temperature output which is indicative of the temperature of the memory device at a selected one of a plurality of possible different temperature resolutions, and wherein the converted temperature output is utilized by the memory circuitry to implement at least one operation with respect to storage of the data.
    Type: Application
    Filed: January 4, 2016
    Publication date: April 28, 2016
    Applicant: Micron Technology, Inc.
    Inventors: Yogesh Luthra, Makoto Kitagawa