Patents by Inventor Hsiang-An Yang

Hsiang-An Yang 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: 10659070
    Abstract: A digital-to-analog converter (DAC) device includes a DAC circuitry. The DAC circuitry includes a first DAC circuit and a second DAC circuit. The first DAC circuit is configured to generate a first signal according to a plurality of least significant bits of an input signal. The second DAC circuit is configured to output a second signal according to a plurality of most significant bits of the input signal. A first turn-on time of at least one current source circuit in the first DAC circuit is configured to set the first signal.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: May 19, 2020
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Wei-Chou Wang, Hsiang-An Yang, Jian-Ru Lin
  • Publication number: 20200099385
    Abstract: A digital-to-analog converter (DAC) device includes a DAC circuitry. The DAC circuitry includes a first DAC circuit and a second DAC circuit. The first DAC circuit is configured to generate a first signal according to a plurality of least significant bits of an input signal. The second DAC circuit is configured to output a second signal according to a plurality of most significant bits of the input signal. A first turn-on time of at least one current source circuit in the first DAC circuit is configured to set the first signal.
    Type: Application
    Filed: April 4, 2019
    Publication date: March 26, 2020
    Inventors: Wei-Chou WANG, Hsiang-An YANG, Jian-Ru LIN
  • Patent number: 10067521
    Abstract: A low dropout regulator includes a PMOS power transistor, a feedback network, an error amplifier and an active enhanced PSRR unit. The PMOS power transistor has a first end coupled to an input voltage, and a second end coupled to a load and the feedback network. The error amplifier receives a feedback signal generated from the feedback network, compares the feedback signal with a reference voltage to generate a difference value, and amplifies the difference value to generate an error signal. The active enhanced PSRR unit has one end coupled to the first end, and another end coupled to a control end of the PMOS power transistor and the error amplifier, detects an input voltage of the first end, and correspondingly adjusts a voltage of the control end to stabilize a voltage between the control end and the first end according to a variation of the input voltage.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: September 4, 2018
    Assignee: Realtek Semiconductor Corp.
    Inventors: Shih-Wei Wang, Chih-Chien Chang, Hsiang-An Yang
  • Publication number: 20170293313
    Abstract: A low dropout regulator includes a PMOS power transistor, a feedback network, an error amplifier and an active enhanced PSRR unit. The PMOS power transistor has a first end coupled to an input voltage, and a second end coupled to a load and the feedback network. The error amplifier receives a feedback signal generated from the feedback network, compares the feedback signal with a reference voltage to generate a difference value, and amplifies the difference value to generate an error signal. The active enhanced PSRR unit has one end coupled to the first end, and another end coupled to a control end of the PMOS power transistor and the error amplifier, detects an input voltage of the first end, and correspondingly adjusts a voltage of the control end to stabilize a voltage between the control end and the first end according to a variation of the input voltage.
    Type: Application
    Filed: November 7, 2016
    Publication date: October 12, 2017
    Inventors: SHIH-WEI WANG, CHIH-CHIEN CHANG, HSIANG-AN YANG
  • Patent number: 9740223
    Abstract: A regulator includes a driver circuit, an amplifier circuit, a first current source circuit and a second current source circuit. The driver circuit is configured to receive an input voltage and provide an output voltage. The first current source circuit is configured to provide a first current to the amplifier circuit. The second current source circuit is configured to provide a second current to the amplifier circuit according to the output voltage if the output voltage deviates from a predetermined voltage. The amplifier circuit is configured to control the driver circuit according to the output voltage and a third current, in which the third current is a sum of the first current and the second current.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: August 22, 2017
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Shih-Wei Wang, Chih-Chien Chang, Hsiang-An Yang