Patents by Inventor Dar-Huei Liao

Dar-Huei Liao 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).

  • Dynamic biasing amplifier apparatus, dynamic biasing apparatus and method
    Patent number: 7479833
    Abstract: A dynamic biasing amplifier apparatus, and dynamic biasing apparatus, and method are disclosed. The dynamic biasing amplifier apparatus includes a comparator unit, a dynamic bias generator unit, and an amplifier unit. The amplifier unit receives an input signal and output an output signal based on at least a bias voltage. The comparator unit compares the positive and negative input signals of the amplifier unit. The dynamic bias generator unit generates and adjusts the bias voltage in accordance with the comparing result of the comparator unit. Therefore, the dynamic bias generator unit controls the amplifier unit to operate in a low static current mode when the input signal is in steady state; and the dynamic bias generator unit controls the amplifier unit to operate in a high dynamic current mode when the input signal is in transition state.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: January 20, 2009
    Assignee: Novatek Microelectronics Corp.
    Inventors: Wei-Zen Chen, Dar-Huei Liao, Chih-Jen Yen
  • DYNAMIC BIASING AMPLIFIER APPARATUS, DYNAMIC BIASING APPARATUS AND METHOD
    Publication number: 20080231372
    Abstract: A dynamic biasing amplifier apparatus, and dynamic biasing apparatus, and method are disclosed. The dynamic biasing amplifier apparatus includes a comparator unit, a dynamic bias generator unit, and an amplifier unit. The amplifier unit receives an input signal and output an output signal based on at least a bias voltage. The comparator unit compares the positive and negative input signals of the amplifier unit. The dynamic bias generator unit generates and adjusts the bias voltage in accordance with the comparing result of the comparator unit. Therefore, the dynamic bias generator unit controls the amplifier unit to operate in a low static current mode when the input signal is in steady state; and the dynamic bias generator unit controls the amplifier unit to operate in a high dynamic current mode when the input signal is in transition state.
    Type: Application
    Filed: August 2, 2007
    Publication date: September 25, 2008
    Applicant: NOVATEK MICROELECTRONICS CORP.
    Inventors: Wei-Zen Chen, Dar-Huei Liao, Chih-Jen Yen