Patents by Inventor Jarkko Routama

Jarkko Routama 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).

  • Temperature compensated crystal oscillator
    Patent number: 7816993
    Abstract: The present invention relates to an integrated circuit for a temperature compensated crystal oscillator having an external crystal. The integrated circuit comprises a temperature compensation having one fixed or at least two selectable 3rd and/or 4th and/or 5th and/or higher order temperature compensation functions for at least one specific type of external crystal. The temperature compensation can be calibrated at one temperature, in other words without use of temperature variation, by means of an external voltage or current source overdriving a respective temperature-dependent voltage or current supplied from an internal temperature sensor to the temperature compensation.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: October 19, 2010
    Assignee: Micro Analog System Oy
    Inventors: Jarkko Routama, Klaus Turhanen
  • Temperature compensated crystal oscillator
    Patent number: 7403078
    Abstract: The present invention relates to an integrated circuit for a temperature compensated crystal oscillator having an external crystal. The integrated circuit comprises a temperature compensation having one fixed or at least two selectable 3rd and/or 4th and/or 5th and/or higher order temperature compensation functions for at least one specific type of external crystal. The temperature compensation can be calibrated at one temperature, in other words without use of temperature variation, by means of an external voltage or current source overdriving a respective temperature-dependent voltage or current supplied from an internal temperature sensor to the temperature compensation.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: July 22, 2008
    Assignee: Micro Analog System Oy
    Inventors: Jarkko Routama, Klaus Turhanen
  • Temperature compensated crystal oscillator
    Publication number: 20080106348
    Abstract: The present invention relates to an integrated circuit for a temperature compensated crystal oscillator having an external crystal. The integrated circuit comprises a temperature compensation having one fixed or at least two selectable 3rd and/or 4th and/or 5th and/or higher order temperature compensation functions for at least one specific type of external crystal. The temperature compensation can be calibrated at one temperature, in other words without use of temperature variation, by means of an external voltage or current source overdriving a respective temperature-dependent voltage or current supplied from an internal temperature sensor to the temperature compensation.
    Type: Application
    Filed: November 26, 2007
    Publication date: May 8, 2008
    Applicant: MICRO ANALOG SYSTEMS OY
    Inventors: Jarkko Routama, Klaus Turhanen
  • Temperature compensated crystal oscillator
    Publication number: 20060132254
    Abstract: The present invention relates to an integrated circuit for a temperature compensated crystal oscillator having an external crystal. The integrated circuit comprises a temperature compensation having one fixed or at least two selectable 3rd and/or 4th and/or 5th and/or higher order temperature compensation functions for at least one specific type of external crystal. The temperature compensation can be calibrated at one temperature, in other words without use of temperature variation, by means of an external voltage or current source overdriving a respective temperature-dependent voltage or current supplied from an internal temperature sensor to the temperature compensation.
    Type: Application
    Filed: December 8, 2005
    Publication date: June 22, 2006
    Applicant: MICRO ANALOG SYSTEMS OY
    Inventors: Jarkko Routama, Klaus Turhanen