Patents by Inventor Hsin-Chi Chan

Hsin-Chi Chan 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).

  • Exponential-logarithmic analog-to-digital converter
    Patent number: 8542140
    Abstract: An analog to digital converter by using an exponential-logarithmic model includes an exponential circuit which acquires an analog input voltage and generates an analog output voltage that is an exponential function of the input voltage. A positive feedback circuit that succeeds the exponential circuit exhibits a natural logarithmic characteristic. A comparator is connected to the positive feedback circuit to compare an output voltage of the positive feedback circuit with a reference voltage. Via the exponential-logarithmic conversion technique, the time interval or pulse produced by the positive feedback circuit is a linear function of the magnitude of the input voltage. Based on the comparator output, a counter is employed to translate the analog input signal to its digital representation.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: September 24, 2013
    Assignee: National Tsing Hua University
    Inventors: Hsin Chen, Hsin-Chi Chan, Yung-Chan Chen
  • Exponential-Logarithmic Analog-to-Digital Converter
    Publication number: 20120176262
    Abstract: The present invention provides an analog to digital converter by using an exponential-logarithmic model. The exponential-logarithmic analog-to-digital converter includes an exponential circuit which acquires an analog input voltage and generates an analog output voltage that is an exponential function of the input voltage. A positive feedback circuit that succeeds the exponential circuit exhibits a natural logarithmic characteristic. A comparator is connected to the positive feedback circuit to compare an output voltage of the positive feedback circuit with a reference voltage. Via the exponential-logarithmic conversion technique, the time interval or pulse produced by the positive feedback circuit is a linear function of the magnitude of the input voltage. Based on the comparator output, a counter is employed to translate the analog input signal to its digital representation.
    Type: Application
    Filed: January 10, 2012
    Publication date: July 12, 2012
    Applicant: National Tsing Hua University
    Inventors: Hsin CHEN, Hsin-Chi Chan, Yung-Chan Chen