Setting, I.e., Correcting Or Changing The Time-indication (synchronization Combined With Automatic Setting At Regular Intervals, E.g., By Coded Signals, Etc., Subclass 920) [g04g 5/00] Patents (Class 968/906)
  • Patent number: 7127632
    Abstract: A method and device for synchronizing the time between at least two integrated circuits (201, 202), which receive the same pulse signal. In the integrated circuits (201, 202) a counter (204, 206) is used to count the number of pulses in the received pulse signal to synchronize the common time between said integrated circuits.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: October 24, 2006
    Assignee: Nokia Corporation
    Inventors: Janne Takala, Sami Mäkelä
  • Patent number: 5274545
    Abstract: A device and method provide for an accurate output from a unit, such as an oscillator and/or clock providing an output indicative of frequency and/or time. The device includes a processing section having a microprocessor that develops a model characterizing the performance of the device, including establishing predicted accuracy variations, and the model is then used to correct the unit output. An external reference is used to provide a reference input for updating the model, including updating of predicted variations of the unit, by comparison of the reference input with the unit output. The ability of the model to accurately predict the performance of the unit improves as additional updates are carried out, and this allows the interval between the updates to be lengthened and/or the overall accuracy of the device to be improved. The accuracy of the output is thus adaptively optimized in the presence of systematic and random variations.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: December 28, 1993
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: David W. Allan, Judah Levine, Dicky D. Davis, Marc A. Weiss