Patents by Inventor Liuchun Cai

Liuchun Cai 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: 11854628
    Abstract: A system can include a voltage generator configured to generate a reference voltage, a power-up voltage, and a replicated voltage based on a power supply voltage. The system can further include a logic sub-component coupled to the voltage generator and configured to output a reset signal based on a comparison of the reference voltage to the power-up voltage and an indication that the reference voltage that has entered a steady state and is reliable as a measurement with respect to a voltage level of the power supply voltage. The indication can be determined based on a comparison of the replicated voltage to a particular threshold voltage level.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: December 26, 2023
    Assignee: Micron Technology, Inc.
    Inventor: Liuchun Cai
  • Patent number: 11422577
    Abstract: An example apparatus can be a low voltage bandgap circuit that includes a bandgap core portion. The bandgap core portion includes an operational amplifier (op-amp). The op-amp includes a PMOS input and an NMOS input. Further, the op-amp is a folded cascode op-amp. The bandgap core portion further includes a first diode coupled to the op-amp. The bandgap core portion further includes a second diode coupled to the op-amp through a resistor.
    Type: Grant
    Filed: July 22, 2021
    Date of Patent: August 23, 2022
    Assignee: Micron Technology, Inc.
    Inventor: Liuchun Cai
  • Publication number: 20210327517
    Abstract: A system can include a voltage generator configured to generate a reference voltage, a power-up voltage, and a replicated voltage based on a power supply voltage. The system can further include a logic sub-component coupled to the voltage generator and configured to output a reset signal based on a comparison of the reference voltage to the power-up voltage and an indication that the reference voltage that has entered a steady state and is reliable as a measurement with respect to a voltage level of the power supply voltage. The indication can be determined based on a comparison of the replicated voltage to a particular threshold voltage level.
    Type: Application
    Filed: June 28, 2021
    Publication date: October 21, 2021
    Inventor: Liuchun Cai
  • Patent number: 11049576
    Abstract: A system can include a voltage generator configured to generate a reference voltage, a power-up voltage, and a replicated voltage based on a power supply voltage. The system can further include a logic sub-component coupled to the voltage generator and configured to output a reset signal based on a comparison of the reference voltage to the power-up voltage and an indication that the reference voltage that has entered a steady state and is reliable as a measurement with respect to a voltage level of the power supply voltage. The indication can be determined based on a comparison of the replicated voltage to a particular threshold voltage level.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: June 29, 2021
    Assignee: Micron Technology, Inc.
    Inventor: Liuchun Cai
  • Publication number: 20210193236
    Abstract: A system can include a voltage generator configured to generate a reference voltage, a power-up voltage, and a replicated voltage based on a power supply voltage. The system can further include a logic sub-component coupled to the voltage generator and configured to output a reset signal based on a comparison of the reference voltage to the power-up voltage and an indication that the reference voltage that has entered a steady state and is reliable as a measurement with respect to a voltage level of the power supply voltage. The indication can be determined based on a comparison of the replicated voltage to a particular threshold voltage level.
    Type: Application
    Filed: December 20, 2019
    Publication date: June 24, 2021
    Inventor: Liuchun Cai
  • Patent number: 10680795
    Abstract: Apparatuses and methods for quadrature signal generation are provided. An example includes a quadrature signal generator. The quadrature signal generator is configured to generate, based on a received differential signal, a plurality of quadrature clock signals at a same frequency as that of the received differential signal. The quadrature signal generator is also configured to provide the plurality of quadrature clock signals to a memory system.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: June 9, 2020
    Assignee: Micron Technology, Inc.
    Inventors: Liuchun Cai, Steven G. Wurzer, Gregory A. King
  • Publication number: 20200112423
    Abstract: Apparatuses and methods for quadrature signal generation are provided. An example includes a quadrature signal generator. The quadrature signal generator is configured to generate, based on a received differential signal, a plurality of quadrature clock signals at a same frequency as that of the received differential signal. The quadrature signal generator is also configured to provide the plurality of quadrature clock signals to a memory system.
    Type: Application
    Filed: May 29, 2019
    Publication date: April 9, 2020
    Inventors: Liuchun Cai, Steven G. Wurzer, Gregory A. King
  • Patent number: 10476660
    Abstract: Apparatuses and methods for quadrature signal generation are provided. An example includes a quadrature signal generator. The quadrature signal generator is configured to generate, based on a received differential signal, a plurality of quadrature clock signals at a same frequency as that of the received differential signal. The quadrature signal generator is also configured to provide the plurality of quadrature clock signals to a memory system.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: November 12, 2019
    Assignee: Micron Technology, Inc.
    Inventors: Liuchun Cai, Steven G. Wurzer, Gregory A. King