Patents Represented by Attorney Davidson Berguist Jackson & Gowdey LLP
  • Patent number: 8289097
    Abstract: The invention provides a method and a modulation circuit for pulse width modulation with feedback, wherein a pulse width modulated signal is provided on the basis of an input signal and a reference signal that is periodic and has a reference frequency. The pulse width modulated signal is provided in that an output signal is switched from a first voltage level to a second voltage level in dependence on a comparison between the input signal and the reference signal at least once in every cycle of the reference signal, and in that at least once at a fixed moment in time in every cycle the pulse width modulated signal is switched from the second voltage level to the first voltage level. Furthermore, a periodic correction signal is added for compensation of the switching from the second voltage level to the first voltage level in the pulse width modulated signal.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: October 16, 2012
    Assignee: Hypex Electronics B.V.
    Inventor: Bruno Johan Georges Putzeys