Patents by Inventor Christof Schmidt-Kreusel

Christof Schmidt-Kreusel 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).

  • Method for computer-assisted iterative determination of the transient response of a quartz resonator circuit
    Patent number: 5787004
    Abstract: In the method, following an operating point determination of the quartz resonator circuit, a substitution of the equivalent circuit diagram of the quartz resonator by an independent current source is implemented with the initial, previously determined amplitude of the current of the dynamic arm of the quartz resonator. The dynamic equilibrium state is determined for this circuit arrangement with firing methods or methods of harmonic balance. After a resubstitution of the current source by the equivalent circuit diagram of the quartz resonator, a transient analysis is implemented for the dynamic equilibrium state. This method is iteratively implemented as long as the identified growth rate lies above a prescribable barrier.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: July 28, 1998
    Assignee: Siemens Aktiengesellschaft
    Inventors: Christof Schmidt-Kreusel, Qinghua Zheng, Joerg-Uwe Feldmann