Patents by Inventor Ihor Wacyk

Ihor Wacyk 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).

  • Mixed mode control for ballast circuit
    Patent number: 6388398
    Abstract: A ballast system in which mixed-mode gate signals are used to control the ballast circuit so as to produce a more straight ballast lines such than only a single solution exists between ballast lines and lamp lines over the whole operating range, whereby a stable of lamp performance is achieved. In a preferred embodiment, symmetric and asymmetric modes are arranged alternatively in every other switching cycle to produce mixed-mode PWM gate signals.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: May 14, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Qiong Li, Ihor Wacyk
  • Modular master-slave power supply controller
    Patent number: 6157093
    Abstract: A master-slave programmable controller arrangement is disclosed for implementing control schemes in various control system topologies. The arrangement employs a modular design which allows a master unit to set operational modes for one or more instances of the same generic slave unit. The master unit and the slave unit communicate via a communications interface. Each slave unit is configured by the master unit to monitor/control one or more components or stages of, for example, a power supply.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: December 5, 2000
    Assignee: Philips Electronics North America Corporation
    Inventors: Demetri Giannopoulos, Ihor Wacyk