Patents by Inventor Mao Ruei Li

Mao Ruei 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).

  • Patent number: 10855291
    Abstract: The disclosure provides a delay estimation device and a delay estimation method. The delay estimation device includes a pulse generator, a digitally controlled delay line (DCDL), a time-to-digital converter (TDC), and a control circuit. The pulse generator receives a reference clock signal, outputs a first clock signal in response to a first rising edge of the reference clock signal, and outputs a second clock signal in response to a second rising edge of the reference clock signal. The DCDL receives the first clock signal from the pulse generator and converts the first clock signal into phase signals based on a combination of delay line codes. The TDC samples the phase signals to generate a timing code based on the second clock signal. The control circuit estimates a specific delay between the first clock signal and the second clock signal based on the timing code.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: December 1, 2020
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Yu-Tso Lin, Chin-Ming Fu, Mao-Ruei Li
  • Patent number: 9748968
    Abstract: An extreme index finder and a digital value finding method are provided. The extreme index finder includes a plurality of digital-to-time converters (DTCs) and a first arbiter apparatus. The DTCs respectively receive a plurality of input signals and perform a digital-to-time converting operation on each of the input signals to respectively generate a plurality of time-domain signals. The first arbiter apparatus finds a position of a extreme value in the time-domain signals according to transition speeds of the time-domain signals and compares transition speed of the extreme value with each of the time-domain signals to find an extreme input signal corresponding to the extreme value in the input signals.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: August 29, 2017
    Assignee: National Tsing Hua University
    Inventors: Mao-Ruei Li, Chia-Hsiang Yang, Yeong-Luh Ueng
  • Publication number: 20160085723
    Abstract: A method of finding a minimum and a minimum finder utilizing the same are provided. The method, adopted by the minimum finder, determining a minimum and a probabilistic second minimum from a plurality of inputs, includes: providing a plurality of Minimum-Value Generators (MVG) to form a binary tree, wherein each MVG receives two of the plurality of inputs, compares the values of the two inputs to output a comparison result; and receiving, by a minimum-and-second-minimum generator, the comparison results of two of the plurality of MVGs to generate the minimum and the probabilistic second minimum; wherein the minimum-and-second-minimum generator is not connected to a MVG in a top layer of the binary tree.
    Type: Application
    Filed: February 4, 2015
    Publication date: March 24, 2016
    Inventors: Yeong-Luh Ueng, Mao-Ruei Li
  • Patent number: 9058880
    Abstract: An unequal bit-reliability information storage method for communication and storage systems at least includes one storage unit having a first memory and a second memory; the most significant information bits are stored in the first memory; and least significant information bits are stored in the second memory. Based on the significance of each bit of the information with the use of the first or second memories of different reliability for storage, the complexity of the storage unit, the production cost and the power consumption can be reduced while maintaining the performance.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: June 16, 2015
    Assignee: NATIONAL TSING HUA UNIVERSITY
    Inventors: Yeong-Luh Ueng, Chia-Hsiang Yang, Mao Ruei Li
  • Patent number: 8977934
    Abstract: A system providing early termination for channel decoding by re-encoding including a decoding unit, an encoding unit connected to the decoding unit, and a checking unit connected to the decoding unit and to the encoding unit. Via the system, decoded message words produced from the decoding unit are sent back to the encoding unit for re-encoding. Re-encoded words are compared to the decoded codewords by the checking unit and, if they are completely the same, the decoding action of the decoding unit is terminated. The system reduces power consumption and offers a simplified structure, improved decoding throughput, and reduced hardware complexity.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: March 10, 2015
    Assignee: National Tsing Hua University
    Inventors: Yeong-Luh Ueng, Mao Ruei Li
  • Publication number: 20140223253
    Abstract: A method of early termination for channel decoding by re-encoding according to the invention at least includes a decoding unit, an encoding unit connected to the decoding unit, and a checking unit connected to the decoding unit and the encoding unit; by means of the configuration of the above units, decoded message words produced from the decoding unit are sent back to the encoding unit for re-encoding; the re-encoded words are compared to the decoded codewords by the checking unit; and if they are completely the same, then terminate the decoding action of the decoding unit. It achieves saved power consumption, simplified structure, improved decoding throughput and less hardware complexity.
    Type: Application
    Filed: February 4, 2013
    Publication date: August 7, 2014
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Yeong-Luh Ueng, Mao Ruei Li
  • Publication number: 20140223261
    Abstract: An unequal bit-reliability information storage method for communication and storage systems at least includes one storage unit having a first memory and a second memory; the most significant information bits are stored in the first memory; and least significant information bits are stored in the second memory.
    Type: Application
    Filed: February 4, 2013
    Publication date: August 7, 2014
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Yeong-Luh Ueng, Chia-Hsiang Yang, Mao Ruei Li