Patent attributes
The functionality and performance of a voltage-controlled oscillator are improved by enabling continuously adjusting an inductor by a control signal. The oscillator has a variable inductor unit with variable inductance; a variable capacitance device connected to the variable inductor unit; an output unit that oscillates at an oscillation frequency determined by the inductance of the variable inductor unit and the capacitance of the variable capacitance device; and a control signal generator for modulating the oscillation frequency. The variable inductor unit has a first inductor; a current signal generator for detecting an electric signal denoting current flowing to the first inductor, and generating a current signal based on the electric signal; and a second inductor that receives the current signal. The first inductor and second inductor are disposed to a predetermined magnetically coupled position, and the variable inductor unit sets the inductance of the first inductor desirably.
