Patents by Inventor Stephen Ludvik

Stephen Ludvik 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).

  • Publication number: 20260002983
    Abstract: A system and method of using a multi-zone substrate to perform electromigration testing of integrated circuits in the high-frequency RF domain. Here, the device under test (DUT) is affixed to a single, multi-zone substrate with a high-temperature zone, a transitional thermal isolation zone, to a low-temperature zone. The high-temperature zone has a DUT interface with a localized heater arrangement. The low-temperature zone provides the interface with RF lines or high speed digital lines to the RF test instrumentation. The DUT input and output pins are attached to the high-temperature zone, and the configuration allows both direct current (DC) and RF stressing of the DUT. The high-temperature zone can raise the DUT temperature to 300-450° C. The RF test port and associated test equipment remain at room temperature.
    Type: Application
    Filed: May 23, 2025
    Publication date: January 1, 2026
    Inventors: Stephen Ludvik, John McKay
  • Patent number: 12313672
    Abstract: A system and method of using a multi-zone substrate to perform electromigration testing of integrated circuits in the high-frequency RF domain. Here, the device under test (DUT) is affixed to a single, multi-zone substrate with a high-temperature zone, a transitional thermal isolation zone, to a low-temperature zone. The high-temperature zone has a DUT interface with a localized heater arrangement. The low-temperature zone provides the interface with RF lines to the RF test instrumentation. The DUT input and output pins are attached to the high-temperature zone, and the configuration allows both direct current (DC) and RF stressing of the DUT. The high-temperature zone can raise the DUT temperature to 300-450° C. The RF test port and associated test equipment remain at room temperature.
    Type: Grant
    Filed: December 10, 2024
    Date of Patent: May 27, 2025
    Assignee: Power Technology Solutions LLC
    Inventors: Stephen Ludvik, John McKay
  • Patent number: 5065110
    Abstract: A feed-forward amplifier utilizes frequency dependent delay elements to cancel the effects of phase dispersion in the amplifier to amplify a broadband, high-frequency signal with low distortion.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: November 12, 1991
    Assignee: Teledyne MEC
    Inventors: Stephen Ludvik, Victor E. Steel, Douglas Scott