Patents by Inventor Johannes Verdaasdonk

Johannes Verdaasdonk 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).

  • Multistep analog-to-digital converter with error correction
    Patent number: 5353027
    Abstract: A sub-ranging analog-to-digital converter includes, in cascade, a coarse converter, a digital-to-analog converter, a subtracter circuit and a fine converter. Errors of the coarse converter are detected in the fine converter by means of an overflow detector and an underflow detector which generate an overflow signal (OF) and an underflow signal (UF), respectively. The digital output (D.sub.A) of the coarse converter is corrected by first subtracting one LBS in a decoder and then, in response to the overflow and underflow signal, adding thereto zero, one or two LBSs.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: October 4, 1994
    Assignee: U.S. Philips Corporation
    Inventors: Pieter P. M. Vorenkamp, Johannes Verdaasdonk, Marcellinus J. M. Pelgrom