Patents by Inventor Olli Haapaporras

Olli Haapaporras 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).

  • Controlled oscillator
    Patent number: 5446417
    Abstract: A controlled oscillator comprising a delay chain having a plurality of series coupled delay lines, the output of the delay chain being fed back as an input to each of the delay lines. Each delay line comprising an invertor such that the delay imparted by the invertor is controlled by a voltage controlled resistance means. The length of the delay chain is controlled by a selection control means which in turn controls the frequency range of operation of the oscillator.
    Type: Grant
    Filed: April 7, 1993
    Date of Patent: August 29, 1995
    Assignee: Nokia Mobile Phones Ltd.
    Inventors: Veijo Korhonen, Olli Haapaporras