Patents by Inventor Antti Kivij{umlaut over (a)}rvi

Antti Kivij{umlaut over (a)}rvi 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).

  • Patent number: 6181211
    Abstract: In a phase locked loop, when seeking loop locking the control variable (S2) arriving from the loop filter (54) is not admitted as such to the oscillator's (55) control input, but it is attenuated so that it will vary within a small range at the middle of its range of variation. At the same time, the loop's output frequency (fVCO) is compared to the frequency of an external frequency source (53), which is sufficiently close to the nominal frequency of the input signal. When the regulating element finds that the oscillator's output frequency is not in a predetermined frequency window, it will add to or reduce the additional control (VCO Cntrl) which it supplies to the oscillator's control input. When the oscillator's (55) frequency has entered the frequency window, the additional control is frozen and the attenuation is removed from the control variable (S2) arriving from the loop filter.
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: January 30, 2001
    Assignee: Nokia Networks OY
    Inventors: Jarmo Aho, Antti Kivij{umlaut over (a)}rvi