Patents by Inventor Rolf F. Becker

Rolf F. Becker 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).

  • Tone receiver comprising a switch capacitor zero crossing detector
    Patent number: 5359652
    Abstract: A zero crossing detector which compensates input offset voltage by switching connections between certain capacitors. A first capacitor connected in parallel with the comparator input, is charged to this offset value during one switching step. Part of this charge is transferred to an input series-connected capacitor during a next switching step. These steps are repeated at a high switching rate. Preferably, a voltage step source is applied to the first capacitor in that next step, and functions as a threshold during the comparison function. Once the threshold has been exceeded, the voltage step source is reversed.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: October 25, 1994
    Assignee: U.S. Philips Corporation
    Inventors: Jaap Mulder, Rolf F. Becker