Patents by Inventor Kun-Ying Lo

Kun-Ying Lo 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).

  • Device and control structure of multi-level pulse width modulation
    Patent number: 6927715
    Abstract: A multi-level pulse width modulation (MPWM) digital-to-analog converter for receiving a n-bit pulse code modulation (PCM) signal and then outputting a m-level analog signal is provided. The MPWM DAC comprises a converter circuit, 2m first output drivers, 2m second output drivers and a control circuit. The converter circuit is used for converting (n-m) most significant bits (MSB) of the n-bit PWM signal into a PWM waveform, and then generating a first input signal and a second input signal. Each of the 2m first output drivers is used for receiving the first input signal, and then generating a first output current, wherein the first output currents of the 2m first output drivers can be equal or not. Each of the 2m second output drivers is used for receiving the second input signal, and then generating a second output current, wherein the second output currents of the 2m first output drivers can be equal or not.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: August 9, 2005
    Assignee: Winbond Electronics Corp.
    Inventors: Sheng-Tsai Chang, Ming-Che Yang, You-Jan Lin, Kun-Ying Lo
  • Device and control structure of multi-level pulse width modulation
    Publication number: 20020041246
    Abstract: ABSTRACT OF THE DISCLOSURE A multi-level pulse width modulation (MPWM) digital-to-analog converter for receiving a n-bit pulse code modulation (PCM) signal and then outputting a m-level analog signal is provided. The MPWM DAC comprises a converter circuit, 2m first output drivers, 2m second output drivers and a control circuit. The converter circuit is used for converting (n-m) most significant bits (MSB) of the n-bit PWM signal into a PWM waveform, and then generating a first input signal and a second input signal. Each of the 2m first output drivers is used for receiving the first input signal, and then generating a first output current, wherein the first output currents of the 2m first output drivers can be equal or not. Each of the 2m second output drivers is used for receiving the second input signal, and then generating a second output current, wherein the second output currents of the 2m first output drivers can be equal or not.
    Type: Application
    Filed: December 28, 2000
    Publication date: April 11, 2002
    Inventors: Sheng-Tsai Chang, Ming-Che Yang, You-Jan Lin, Kun-Ying Lo