VOLTAGE CONTROLLED OSCILLATOR, OPERATION CURRENT ADJUSTING DEVICE, AND OPERATION CURRENT ADJUSTING METHOD OF VOLTAGE CONTROLLED OSCILLATOR

摘要

A voltage controlled oscillator has an amplifier circuit which includes an inductor and a variable capacitance element, and outputs an oscillation signal of an oscillation frequency corresponding to an oscillation frequency control voltage supplied to the variable capacitance element; and a power supply circuit which supplies an operation current to the amplifier circuit, wherein by changing the operation current outputted from the power supply circuit in a state where the oscillation frequency control voltage is fixed to a desired value, a value of the operation current at which the oscillation frequency of the oscillation signal takes a value in the vicinity of a maximum value, is extracted, and the extracted value of the operation current is set as a value of the operation current outputted from the power supply circuit.