Patents by Inventor Doug LaPorte

Doug LaPorte 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).

  • Methods and circuits for frequency modulation that reduce the spectral noise of switching regulators
    Patent number: 7362191
    Abstract: The present invention comprises methods and circuits for spread spectrum frequency modulation that reduce peak spectral noise at the outputs or inputs of switching regulators. More specifically, the present invention modulates the operating frequency of the switching regulator in accordance with a frequency modulation waveform having a shape coordinated to a peak noise amplitude waveform that describes the correlation between the operating frequency of a switching regulator and the peak noise amplitude at the regulator's input or output absent spread spectrum frequency modulation.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: April 22, 2008
    Assignee: Linear Technology Corporation
    Inventors: Yuhui Chen, Doug LaPorte, Randy Guy Flatness, Robert C. Dobkin
  • Methods and circuits for frequency modulation that reduce the spectral noise of switching regulators
    Publication number: 20050243894
    Abstract: The present invention comprises methods and circuits for spread spectrum frequency modulation that reduce peak spectral noise at the outputs or inputs of switching regulators. More specifically, the present invention modulates the operating frequency of the switching regulator in accordance with a frequency modulation waveform having a shape coordinated to a peak noise amplitude waveform that describes the correlation between the operating frequency of a switching regulator and the peak noise amplitude at the regulator's input or output absent spread spectrum frequency modulation.
    Type: Application
    Filed: April 29, 2004
    Publication date: November 3, 2005
    Inventors: Yuhui Chen, Doug LaPorte, Randy Flatness, Robert Dobkin
  • Flexible monolithic continuous-time analog low-pass filter with minimal circuitry
    Patent number: 6344773
    Abstract: A completely tunable second order low-pass filter with minimal active circuitry is disclosed. The filter provides a very flexible choice of filter parameters such as cutoff frequency, DC gain, and Q factor, by selecting appropriate resistor values for a single integrated circuit with much lower capacitance, capacitance ratio, and active circuitry than other standard low-pass circuit configurations.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: February 5, 2002
    Assignee: Linear Technology Corporation
    Inventors: Nello G. Sevastopoulos, Doug A. LaPorte