Patents by Inventor Mika Haapanen

Mika Haapanen 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).

  • Phase-locked loop having charge pump controlled according to temperature and frequency
    Patent number: 5751194
    Abstract: A phase locked loop (PLL) includes a phase comparator (12), a charge pump (13), a loop filter (14) and a voltage controlled oscillator (15). In order to minimize the lock-in time of the PLL under conditions of varying external temperatures, the PLL is supplied with temperature measurements, and the output of the charge pump is controlled according to both the external temperature and a desired frequency.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: May 12, 1998
    Assignee: Nokia Telecommunications OY
    Inventors: Mika Haapanen, Andre Dekker