Patents Assigned to ASP Technologies
  • INDUCTOR-LESS CHARGE PUMP, POWER SUPPLY APPARATUS AND LED LIGHT BULB SYSTEM
    Publication number: 20180132316
    Abstract: An inductor-less LED power supply apparatus and method are disclosed which includes a charge pump and current driver.
    Type: Application
    Filed: November 8, 2016
    Publication date: May 10, 2018
    Applicant: ASP Technologies
    Inventors: Wai Lee, Calvin Lee
  • PWM digital amplifier with high-order loop filter
    Patent number: 7463088
    Abstract: An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter are optimized to distribute large loop gains across the entire band to provide large suppression of noise and distortions generated in the modulation and output stages.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: December 9, 2008
    Assignee: ASP Technologies
    Inventor: Wai L. Lee
  • PWM digital amplifier with high-order loop filter
    Patent number: 7429890
    Abstract: An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter are optimized to distribute large loop gains across the entire band to provide large suppression of noise and distortions generated in the modulation and output stages.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: September 30, 2008
    Assignee: ASP Technologies
    Inventor: Wai L. Lee
  • PWM digital amplifier with high-order loop filter
    Patent number: 7388425
    Abstract: An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter are optimized to distribute large loop gains across the entire band to provide large suppression of noise and distortions generated in the modulation and output stages.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: June 17, 2008
    Assignee: ASP Technologies
    Inventor: Wai L. Lee
  • PWM digital amplifier with high-order loop filter
    Patent number: 7345532
    Abstract: An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter are optimized to distribute large loop gains across the entire band to provide large suppression of noise and distortions generated in the modulation and output stages.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: March 18, 2008
    Assignee: ASP Technologies
    Inventor: Wai L. Lee
  • PWM digital amplifier with high-order loop filter
    Patent number: 7345533
    Abstract: An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter are optimized to distribute large loop gains across the entire band to provide large suppression of noise and distortions generated in the modulation and output stages.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: March 18, 2008
    Assignee: ASP Technologies
    Inventor: Wai L. Lee
  • PWM digital amplifier with high-order loop filter
    Patent number: 7271650
    Abstract: An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter are optimized to distribute large loop gains across the entire band to provide large suppression of noise and distortions generated in the modulation and output stages.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: September 18, 2007
    Assignee: ASP Technologies
    Inventor: Wai L. Lee