Voltage controlled oscillator

摘要

The oscillator has two variable capacitors (Cv-, Cv+), whose capacitances vary with respect to a control voltage of the oscillator and applied voltage, respectively. A changeover switch (6) is coupled to the capacitors. A control circuit controls the switch to change the capacitance of one capacitor varying in direction of applied voltage and to change the capacitance of another capacitor varying in direction opposite to the voltage.