Patents by Inventor Yuan-Tung Peng

Yuan-Tung Peng 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: 7443252
    Abstract: A calibration circuit for voltage-controlled oscillator (VCO) includes a calibration bias generator, a VCO, a detection unit, a micro control unit, an adjuster unit, a phase-locked loop (PLL) unit, a control voltage detection unit, and a control switch set. The calibration bias generator outputs a first control voltage. The VCO outputs an oscillation frequency according to the first control voltage. The detection unit detects the oscillation frequency and outputs the detection result signal to the micro control unit. The micro control unit outputs an adjust signal according to the detection result signal. The adjuster unit receives the adjust signal voltage and adjusts the oscillation frequency output from the VCO according to the adjust signal voltage. The PLL unit outputs a second control voltage to the VCO. The control voltage detection unit outputs voltage-detection signal to the micro control unit, which outputs the adjust signal according to the voltage-detection signal.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: October 28, 2008
    Assignee: Novatek Microelectronics Corp.
    Inventors: Yih-Min Tu, Yuan-Tung Peng, Ping-Hsun Hsieh, Min-Chieh Hsu
  • Patent number: 7386065
    Abstract: A voltage controlled oscillator (VCO), suitable for use in a frequency shift keying (FSK) system. The VCO device comprises a switching varactor unit, having a first terminal and a second terminal, wherein the switching varactor unit produces a capacitance, according to a frequency-selection voltage. A VCO core has a first output terminal, a second output terminal complementary to the first output terminal, and an input terminal. Wherein, the switching varactor unit is coupled in parallel with the VCO core at the first output terminal and the second output terminal to produce a capacitance effect with respect to the capacitance, so as to adjust a frequency constant ?{square root over (LC)} of the VCO core.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: June 10, 2008
    Assignee: Novatek Microelectronics Corp.
    Inventors: Yih-Min Tu, Yung-Lung Chen, Yuan-Tung Peng, Fan-Chung Lee
  • Publication number: 20070080751
    Abstract: A calibration circuit for voltage-controlled oscillator (VCO) includes a calibration bias generator, a VCO, a detection unit, a micro control unit, an adjuster unit, a phase-locked loop (PLL) unit, a control voltage detection unit, and a control switch set. The calibration bias generator outputs a first control voltage. The VCO outputs an oscillation frequency according to the first control voltage. The detection unit detects the oscillation frequency and outputs the detection result signal to the micro control unit. The micro control unit outputs an adjust signal according to the detection result signal. The adjuster unit receives the adjust signal voltage and adjusts the oscillation frequency output from the VCO according to the adjust signal voltage. The PLL unit outputs a second control voltage to the VCO. The control voltage detection unit outputs voltage-detection signal to the micro control unit, which outputs the adjust signal according to the voltage-detection signal.
    Type: Application
    Filed: June 26, 2006
    Publication date: April 12, 2007
    Inventors: Yih-Min Tu, Yuan-Tung Peng, Ping-Hsun Hsieh, Min-Chieh Hsu
  • Publication number: 20050243487
    Abstract: A switchable power supply system and a method thereof is provided. The power supply system includes a power supply and a control circuit. The power supply has a power output terminal connected to a load. The power output terminal provides the load with a first power source or a second power source. The control circuit is disposed in the power supply and connected to the power output terminal for detecting the operation mode of the load. When the load is in a predetermined operating mode, the power supply is forced to provide the power output terminal with the first power source. Otherwise, the control circuit will automatically switch the power supply system to provide the power output terminal with the first power source or the second power source according to the status of the load.
    Type: Application
    Filed: April 26, 2005
    Publication date: November 3, 2005
    Inventors: Yung-Lung Chen, Yuan-Tung Peng, Nelson Bao
  • Publication number: 20050036567
    Abstract: A voltage controlled oscillator (VCO), suitable for use in a frequency shift keying (FSK) system. The VCO device comprises a switching varactor unit, having a first terminal and a second terminal, wherein the switching varactor unit produces a capacitance, according to a frequency-selection voltage. A VCO core has a first output terminal, a second output terminal complementary to the first output terminal, and an input terminal. Wherein, the switching varactor unit is coupled in parallel with the VCO core at the first output terminal and the second output terminal to produce a capacitance effect with respect to the capacitance, so as to adjust a frequency constant {square root}{square root over (LC)} of the VCO core.
    Type: Application
    Filed: August 15, 2003
    Publication date: February 17, 2005
    Inventors: Yih-Min Tu, Yung-Lung Chen, Yuan-Tung Peng, Fan-Chung Lee