Patents by Inventor Jiangyi Li

Jiangyi Li 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).

  • Retention voltage generator circuit
    Patent number: 11004482
    Abstract: Memory circuits used in computer systems may have different operating modes. In a retention mode, a voltage level of an array power supply node coupled to memory cells included in the memory circuit is reduced to a level sufficient to retain data, but not to perform read and write operations to the memory cells. A power converter circuit may be configured to generate the retention voltage level, and adjust the retention voltage level using a leakage current of dummy memory cells included in the memory circuit.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: May 11, 2021
    Assignee: Apple Inc.
    Inventors: Jaemyung Lim, Jiangyi Li, Mohamed H. Abu-Rahma, Shahzad Nazar, Jaroslav Raszka
  • Voltage and temperature compensated device for physically unclonable function
    Patent number: 10135615
    Abstract: Systems and methods for providing assistance for performing a physically unclonable function (PUF) are provided. Disclosed systems can include a PUF bitcell including at least two voltage-compensated proportional-to-absolute (PTAT) generators, each of which can be configured to generate a first voltage and a second voltage that is different from the first voltage by a voltage difference. The voltage difference can be resistant to temperature variations and variations, if any, in the supply voltage. The system can further include a comparator, which can be electrically coupled to each of the at least two PTAT generators, and can be configured to receive the first voltage and the second voltage generated therefrom, determine a polarity of each of the voltage differences, and generate a random bit.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: November 20, 2018
    Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventors: Mingoo Seok, Jiangyi Li
  • VOLTAGE AND TEMPERATURE COMPENSATED DEVICE FOR PHYSICALLY UNCLONABLE FUNCTION
    Publication number: 20160337123
    Abstract: Systems and methods for providing assistance for performing a physically unclonable function (PUF) are provided. Disclosed systems can include a PUF bitcell including at least two voltage-compensated proportional-to-absolute (PTAT) generators, each of which can be configured to generate a first voltage and a second voltage that is different from the first voltage by a voltage difference. The voltage difference can be resistant to temperature variations and variations, if any, in the supply voltage. The system can further include a comparator, which can be electrically coupled to each of the at least two PTAT generators, and can be configured to receive the first voltage and the second voltage generated therefrom, determine a polarity of each of the voltage differences, and generate a random bit.
    Type: Application
    Filed: May 11, 2016
    Publication date: November 17, 2016
    Inventors: Mingoo Seok, Jiangyi Li