Patents by Inventor Joan W. Strijker

Joan W. Strijker 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).

  • Switched-mode power supply having a delay-insensitive timing in the control loop
    Patent number: 5901052
    Abstract: A flyback converter including a transformer (6) having a primary winding (4) and a switching transistor (2), arranged in series therewith; control device (14) for closing the switching transistor (2) during a primary interval and opening the switching transistor (2) during a secondary interval in response to a control signal (U.sub.c), an auxiliary winding (12) for generating a feedback signal (U.sub.FB), measurement device (20) for unidirectionally measuring the feedback signal (U.sub.FB), a comparator (16) and a logic circuit (18) for deriving from the feedback signal (U.sub.FB) a first timing signal (TM.sub.1) which is representative of the secondary interval; comparison device for comparing the unidirectionally measured feedback signal (I.sub.FB) with a reference signal (I.sub.R) during the secondary interval, and an integrator (28) for generating the control signal (U.sub.C) in response to the comparison.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: May 4, 1999
    Assignee: U.S. Philips Corporation
    Inventor: Joan W. Strijker