Patents by Inventor Andreas O. F. Belkner

Andreas O. F. Belkner 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).

  • Level conversion of AC or DC voltage with noise rejection and low power consumption
    Patent number: 5491405
    Abstract: An input voltage U.sub.IN to a voltage level converter 10 having a high input impedance charges a storage element which periodically discharges current to an LED 16 which periodically provides a light pulse for generating a level converted version of the input voltage U.sub.IN. A resistor R.sub.p 22 connected to the storage element allows the storage element to discharge noise voltage spikes in the input voltage U.sub.IN.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: February 13, 1996
    Assignee: Otis Elevator Company
    Inventors: Helmut L. Schroder-Brumloop, Andreas O. F. Belkner