Patents by Inventor Jan Osterberg

Jan Osterberg 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).

  • Circuitry and method for detecting frequency deviation caused by aging of an oscillator
    Patent number: 5881374
    Abstract: Apparatus, and associated method, for determining frequency deviation of an oscillator due to aging of the oscillator. Frequency deviation of a clock signal generated by the oscillator relative to a reference clock signal is determined, and the component of the frequency deviation due to aging of the oscillator is estimated from the total value. The determined value of frequency deviation can be utilized in a feedback arrangement to tune the oscillator to counteract for the effects of aging of the oscillator. The frequency deviation can be determined even if the reference signal is of a center frequency susceptible to being offset from a nominal center frequency beyond an allowable amount within a limited time period.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: March 9, 1999
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Jan Osterberg