Patents by Inventor Olaf Rostbakken

Olaf Rostbakken 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).

  • Multi-band voltage controlled oscillator in which unnecessary circuit parasitics can be avoided
    Patent number: 6194974
    Abstract: In a voltage controlled oscillator in which an operation frequency is determined by applying a tuning voltage to a resonant circuit connected to a control terminal of a transistor (T1), the resonant circuit has zeroth and first varactor diodes (D0, D1) which can serve as capacitance elements. A selection voltage is applied to an anode of the first varactor diode through a band selection terminal (1). The first vatactor diode has a capacitance varying in response to the value of the selection voltage. The variation of the capacitance causes a change of a frequency band of the voltage controlled oscillator. A tuning voltage is applied through a tuning terminal (2).
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: February 27, 2001
    Assignee: NEC Corporation
    Inventors: Allen Craig, Olaf Rostbakken