Patents by Inventor Longhai Ye

Longhai Ye 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).

  • Digital amplifier and methods for enhancing resolution and dynamic range of a digital amplifier
    Patent number: 7023269
    Abstract: An amplifier including a difference amplifier, said difference amplifier including a first output and a second output which are adapted for providing a PWM signal output to a load by signal difference between said first and said second outputs, said difference amplifier being adapted for operating in at least first and second alternative operating modes which are respectively characterised by first and second operating voltages, wherein during transition from one operating mode to another, the pulse area of the pulses of said first and second outputs of said difference amplifier are changed according to a pre-determined manner so that the pulse area of pulses of said first and second outputs at the end of said transitional mode is equivalent to the pulse area of the pulses of said first and second outputs immediately after the change of operating modes.
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: April 4, 2006
    Assignee: GPE International Limited
    Inventors: Yongmin Meng, Longhai Ye, Yiu Cheung Brian Li
  • DIGITAL AMPLIFIER AND METHODS FOR ENHANCING RESOLUTION AND DYNAMIC RANGE OF A DIGITAL AMPLIFIER
    Publication number: 20060049869
    Abstract: An amplifier including a difference amplifier, said difference amplifier including a first output and a second output which are adapted for providing a PWM signal output to a load by signal difference between said first and said second outputs, said difference amplifier being adapted for operating in at least first and second alternative operating modes which are respectively characterised by first and second operating voltages, wherein during transition from one operating mode to another, the pulse area of the pulses of said first and second outputs of said difference amplifier are changed according to a pre-determined manner so that the pulse area of pulses of said first and second outputs at the end of said transitional mode is equivalent to the pulse area of the pulses of said first and second outputs immediately after the change of operating modes.
    Type: Application
    Filed: September 8, 2004
    Publication date: March 9, 2006
    Applicant: GPE International Limited
    Inventors: Yongmin Meng, Longhai Ye, Yiu Li