Patents by Inventor Stephen Witte

Stephen Witte 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).

  • PARTICLATE SOLID, PROCESS FOR THE PRODUCTION THEREOF, USE AS FILLER AND ASSOCIATED ARTICLES
    Publication number: 20150183964
    Abstract: The inorganic oxidic filler of the invention has hydrolysis-resistant peroxy functionalization and is specifically suitable for bonding into polymer mixtures crosslinked by a free-radical root, in particular in technical items composed of polymer or of elastomer, for example tires, tire components, drive belts, drive belt components, air springs, conveyor belts, hoses, gaskets, etc. Peroxyorganosiloxane groups are bonded here by way of oxygen to oxides of silicon, aluminum, magnesium, calcium, zinc, zirconium, and/or titanium.
    Type: Application
    Filed: December 18, 2012
    Publication date: July 2, 2015
    Applicant: Evonik Industries AG
    Inventors: Stephen Witte, Wolfram Herrmann
  • Efficiency measuring circuit for DC-DC converter which calculates internal resistance of switching inductor based on duty cycle
    Patent number: 8278895
    Abstract: An efficiency measuring circuit may measure the efficiency of a DC-DC converter having a switching inductor with an internal DC resistance and a plurality of electronic switches that control current through the inductor. A duty cycle circuit may measure the duty cycle of current flowing through one of the electronic switches. A current sense circuit may measure the current flowing through one of the electronic switches. An inductor voltage sensor circuit may measure the voltage across the inductor. A computation circuit may compute the internal DC resistance of the switching inductor based in part on the duty cycle measured by the duty cycle circuit and the current measured by the current sense circuit. The computation circuit may also compute the efficiency of the DC-DC converter.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: October 2, 2012
    Assignee: Linear Technology Corporation
    Inventors: Andrew Joseph Gardner, Gregory Jon Manlove, Robert C. Chiacchia, Hellmuth Stephen Witte
  • EFFICIENCY MEASURING CIRCUIT FOR DC-DC CONVERTER WHICH CALCULATES INTERNAL RESISTANCE OF SWITCHING INDUCTOR BASED ON DUTY CYCLE
    Publication number: 20110156687
    Abstract: An efficiency measuring circuit may measure the efficiency of a DC-DC converter having a switching inductor with an internal DC resistance and a plurality of electronic switches that control current through the inductor. A duty cycle circuit may measure the duty cycle of current flowing through one of the electronic switches. A current sense circuit may measure the current flowing through one of the electronic switches. An inductor voltage sensor circuit may measure the voltage across the inductor. A computation circuit may compute the internal DC resistance of the switching inductor based in part on the duty cycle measured by the duty cycle circuit and the current measured by the current sense circuit. The computation circuit may also compute the efficiency of the DC-DC converter.
    Type: Application
    Filed: April 6, 2010
    Publication date: June 30, 2011
    Applicant: LINEAR TECHNOLOGY CORPORATION
    Inventors: Andrew Joseph Gardner, Gregory Jon Manlove, Robert C. Chiacchia, Hellmuth Stephen Witte