Patents by Inventor Katherine Mueller

Katherine Mueller 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).

  • Resonant converter for achieving low common-mode noise, along with isolated power supply and method employing the same
    Patent number: 9240729
    Abstract: Embodiments are described for reducing common-mode current in electronic devices. In the various embodiments, a resonant converter is employed, for example in a power supply, and the resonant converter is driven by a DC input to generate an AC primary voltage on the primary windings of a power transformer. The DC input may be derived from an AC line voltage or a DC-to-DC converter. The AC primary voltage drives the primary winding of the transformer to generate an AC secondary voltage on at least one secondary winding of the transformer. The AC secondary voltage may then drive a rectifier, which in turn drives a low-pass filter to produce a DC output voltage. Phase-shift modulation is employed which, in conjunction with the resonant converter, applies a sinusoidal waveform to the primary of the transformer resulting in a reduced amount of common-mode current injected onto the secondary.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: January 19, 2016
    Assignee: Keysight Technologies, Inc.
    Inventors: John F. Kenny, Joe E. Marriott, Katherine Mueller, Michael J. Benes, Daniel Miller
  • RESONANT CONVERTER FOR ACHIEVING LOW COMMON-MODE NOISE, ALONG WITH ISOLATED POWER SUPPLY AND METHOD EMPLOYING THE SAME
    Publication number: 20100328974
    Abstract: Embodiments are described for reducing common-mode current in electronic devices. In the various embodiments, a resonant converter is employed, for example in a power supply, and the resonant converter is driven by a DC input to generate an AC primary voltage on the primary windings of a power transformer. The DC input may be derived from an AC line voltage or a DC-to-DC converter. The AC primary voltage drives the primary winding of the transformer to generate an AC secondary voltage on at least one secondary winding of the transformer. The AC secondary voltage may then drive a rectifier, which in turn drives a low-pass filter to produce a DC output voltage. Phase-shift modulation is employed which, in conjunction with the resonant converter, applies a sinusoidal waveform to the primary of the transformer resulting in a reduced amount of common-mode current injected onto the secondary.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Inventors: John F. Kenny, Joe E. Marriott, Katherine Mueller, Michael J. Benes, Daniel Miller