Patents by Inventor Caspar P.L. Van Vroonhoven

Caspar P.L. Van Vroonhoven 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).

  • Multiple electrothermal-filter device
    Patent number: 8870454
    Abstract: During operation of the device, a drive circuit may provide a drive signal having a fundamental frequency to two electrothermal filters (ETFs) having different temperature-dependent time constants. In response to the drive signal, the two ETFs may provide signals having the fundamental frequency and phases relative to the drive signal corresponding, respectively, to the time constants of the ETFs. Then, phase-shift values of the phases may be measured using a phase detector, and a signal may be output based on the phase-shift values. Note that the signal may correspond to a value that is a function of a temperature of the device.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: October 28, 2014
    Assignee: Stichting voor de Technische Wetenschappen
    Inventors: Kofi A. A. Makinwa, Caspar P. L. Van Vroonhoven
  • Multiple electrothermal-filter device
    Publication number: 20130147528
    Abstract: During operation of the device, a drive circuit may provide a drive signal having a fundamental frequency to two electrothermal filters (ETFs) having different temperature-dependent time constants. In response to the drive signal, the two ETFs may provide, signals having the fundamental frequency and phases relative to the drive signal corresponding, respectively, to the time constants of the ETFs. Then, phase-shift values of the phases may be measured using a phase detector, and a signal may be output based on the phase-shift values. Note that the signal may correspond to a value that is a function of a temperature of the device.
    Type: Application
    Filed: December 13, 2011
    Publication date: June 13, 2013
    Inventors: Kofi A.A. Makinwa, Caspar P.L. Van Vroonhoven