Patents by Inventor Day-Uei Li

Day-Uei 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: 8031750
    Abstract: A light transmitter and an auto-control circuit thereof are provided. The circuit includes a driving module and a feedback module. The driving module is coupled to the feedback module and a load. The driving module provides a driving current for driving the load. The feedback module provides a bias signal to the driving module according to the change of the temperature, for adjusting the driving current and stabilizing an output power.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: October 4, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Day-Uei Li, Hsin-Chao Chen
  • Publication number: 20100322274
    Abstract: A light transmitter and an auto-control circuit thereof are provided. The circuit includes a driving module and a feedback module. The driving module is coupled to the feedback module and a load. The driving module provides a driving current for driving the load. The feedback module provides a bias signal to the driving module according to the change of the temperature, for adjusting the driving current and stabilizing an output power.
    Type: Application
    Filed: August 27, 2010
    Publication date: December 23, 2010
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Day-Uei Li, Hsin-Chao Chen
  • Patent number: 7813392
    Abstract: A light transmitter and an auto-control circuit thereof are provided. The circuit includes a driving module and a feedback module. The driving module is coupled to the feedback module and a load. The driving module provides a driving current for driving the load. The feedback module provides a bias signal to the driving module according to the change of the temperature, for adjusting the driving current and stabilizing an output power.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: October 12, 2010
    Assignee: Idustrial Technology Research Institute
    Inventors: Day-Uei Li, Hsin-Chao Chen
  • Publication number: 20090129415
    Abstract: A light transmitter and an auto-control circuit thereof are provided. The circuit includes a driving module and a feedback module. The driving module is coupled to the feedback module and a load. The driving module provides a driving current for driving the load. The feedback module provides a bias signal to the driving module according to the change of the temperature, for adjusting the driving current and stabilizing an output power.
    Type: Application
    Filed: April 1, 2008
    Publication date: May 21, 2009
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Day-Uei Li, Hsin-Chao Chen
  • Patent number: 7453322
    Abstract: A transimpedance amplifier (TIA) with negative impedance compensation comprises a TIA element and a negative impedance compensator connected to the output terminal of the TIA element. The major components of the negative impedance compensator are a negative impedance element formed by a positive feedback circuit, and a compensation circuit for the parasitic capacitance at the output terminal. The negative impedance compensator changes the equivalent impedance of the output terminal from low to high with respect to the ground, and compensates the parasitic capacitance at the output terminal. Thus, an increase of both bandwidth and voltage gain is achieved.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: November 18, 2008
    Assignee: Industrial Technology Research Institute
    Inventors: Day-Uei Li, Chia-Ming Tsai
  • Patent number: 7315272
    Abstract: An analog-to-digital converter device for converting an analog signal into a digital signal includes a comparator array including a plurality of comparators, each of the comparators including a first inverter and a second inverter connected in series with the first inverter, a resistor string including a plurality of resistors connected in series, each of the resistors corresponding to one of the plurality of comparators, and a current generator for providing a constant current flowing through the resistor string.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: January 1, 2008
    Assignee: Industrial Technology Research Institute
    Inventors: Day-Uei Li, Chun-Chi Chen
  • Patent number: 7248610
    Abstract: A laser driver. The laser driver comprises a diode driver, a power detector, a first extreme detector, a second extreme detector and a current controller. The diode driver receives bias and modulation currents to control a laser diode for generating light signals. The power detector detects optical power of the light signals. The first and second extreme detectors, both coupled to the power detector, detect the first and second extreme values among detected optical power. The first extreme value is either the maximum or the minimum optical power of the light signals, while the second extreme value is the other.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: July 24, 2007
    Assignee: Industrial Technology Research Institute
    Inventors: Day-Uei Li, Li-Ren Huang, Wei-Zen Chen
  • Publication number: 20070152756
    Abstract: A transimpedance amplifier (TIA) with negative impedance compensation is disclosed, which comprises a TIA element and a negative impedance compensator connected to the output terminal of the TIA element. There are various designs capable of implementing the negative impedance compensator. The major components of the negative impedance compensator are a negative impedance element formed by a positive feedback circuit, and a compensation circuit for the parasitic capacitance at the output terminal. The negative impedance compensator changes the equivalent impedance of the output terminal from low to high with respect to the ground, and compensates the parasitic capacitance at the output terminal. Thus, an increase of both bandwidth and voltage gain is achieved.
    Type: Application
    Filed: March 6, 2006
    Publication date: July 5, 2007
    Inventors: Day-Uei Li, Chia-Ming Tsai
  • Publication number: 20070096970
    Abstract: An analog-to-digital converter device for converting an analog signal into a digital signal includes a comparator array including a plurality of comparators, each of the comparators including a first inverter and a second inverter connected in series with the first inverter, a resistor string including a plurality of resistors connected in series, each of the resistors corresponding to one of the plurality of comparators, and a current generator for providing a constant current flowing through the resistor string.
    Type: Application
    Filed: October 27, 2005
    Publication date: May 3, 2007
    Inventors: Day-Uei Li, Chun-Chi Chen
  • Publication number: 20060120420
    Abstract: A laser driver. The laser driver comprises a diode driver, a power detector, a first extreme detector, a second extreme detector and a current controller. The diode driver receives bias and modulation currents to control a laser diode for generating light signals. The power detector detects optical power of the light signals. The first and second extreme detectors, both coupled to the power detector, detect the first and second extreme values among detected optical power. The first extreme value is either the maximum or the minimum optical power of the light signals, while the second extreme value is the other.
    Type: Application
    Filed: May 3, 2005
    Publication date: June 8, 2006
    Inventors: Day-Uei Li, Li-Ren Huang