Patents by Inventor Mika Tiilikainen

Mika Tiilikainen 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).

  • Calibratable field effect transistors
    Patent number: 6181194
    Abstract: A method of calibrating a field effect transistor having a source (3), a drain (4), a resistive gate (2), and a calibration DC current source (7) and a calibration DC current sink (7) coupled to respective spaced apart regions of the transistor gate (2). In use a substantially DC calibration current is passed through the gate (2) between said spaced apart regions to trim the effective width of the transistor channel.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: January 30, 2001
    Assignee: Nokia Mobile Phones Limited
    Inventor: Mika Tiilikainen
  • Regulating the gain of a circuit including a programmable current amplifier using a control signal
    Patent number: 6121830
    Abstract: The invention relates to programmable amplifiers, more specifically to structural solutions of amplifiers realised on integrated circuits. In the amplifier according to the invention a differential voltage-mode input signal is converted into a differential current signal and at least part of the common-mode component is removed from the differential current signal. An offset current is added to the differential current signal and the magnitude of the offset current is adjusted according to the gain, thus preventing the common-mode current from becoming too large at the amplification stage. The differential current signal is amplified using programmable current amplifiers realised by current mirrors and converted back into a voltage-mode signal.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: September 19, 2000
    Assignee: Nokia Mobile Phones, Ltd.
    Inventors: Hannu Manninen, Mika Tiilikainen