Output stabilization circuit and DC/DC converter circuit

An output stabilization circuit comprising:

• a primary-side circuit including a first self-excited oscillator circuit and a second self-excited oscillator circuit connected to a direct-current power supply;
• and
• a secondary-side circuit configured to obtain an output voltage by oscillation of the first self-excited oscillator circuit and the second self-excited oscillator circuit, wherein
• the first self-excited oscillator circuit includes:
• a first power transmission coil;
• a first resonant capacitor constituting a resonant circuit together with the first power transmission coil;
• a first pair of switching elements connected to the first power transmission coil;
• and
• a first feedback coil magnetically coupled to the first power transmission coil and connected to each control electrode of the first pair of switching elements,
• the second self-excited oscillator circuit includes:
• a second power transmission coil;
• a second resonant capacitor constituting a resonant circuit together with the second power transmission coil;
• a second pair of switching elements connected to the second power transmission coil;
• a second feedback coil magnetically coupled to the first feedback coil and connected to each control electrode of the second pair of switching elements;
• and
• a phase shift filter connected between the second feedback coil and each control electrode of the second pair of switching elements,
• the secondary-side circuit includes a secondary-side control coil in which a magnitude of a flowing current is controlled depending on a magnitude of the output voltage, and
• the phase shift filter includes a primary-side control coil magnetically coupled to the secondary-side control coil and having a characteristic that an inductance changes depending on a current flowing through the secondary-side control coil.