A converter capable of ensuring the transformation, with an insulation, of a primary voltage (E 1) into a secondary voltage (E 2), the converter comprising: - a primary stage coupled to first and second nodes of application of the primary voltage (E 1) and comprising: a first winding having a first end coupled to the first node; a primary parallel resonant circuit coupled to a second end of the first winding; a second winding assembled in parallel with the primary parallel resonant circuit and forming the primary of a first transformer (T 2); and first and second primary switches each assembled in series with an output branch of the primary parallel resonant circuit and coupling said output branch to the second node, - and a secondary stage coupled to third and fourth nodes supplying the secondary voltage (E 2) and comprising: a third winding having a first end coupled to the third node; and a fourth winding coupled to a second end of the third winding and forming the secondary of the first transformer (T 2), characterized in that the first primary switch comprises first and second series-assembled transistors, and the second primary switch comprises third and fourth series-assembled transistors, the gates of the first and third transistors being coupled to a same node of application of a first DC bias voltage, the gate of the second transistor being coupled to the junction point of the third and fourth transistors, and the gate of the fourth transistor being coupled to the junction point of the first and second transistors. - a primary stage coupled to first and second nodes of application of the primary voltage (E 1) and comprising: a first winding having a first end coupled to the first node; a primary parallel resonant circuit coupled to a second end of the first winding; a second winding assembled in parallel with the primary parallel resonant circuit and forming the primary of a first transformer (T 2); and first and second primary switches each assembled in series with an output branch of the primary parallel resonant circuit and coupling said output branch to the second node, a first winding having a first end coupled to the first node; a primary parallel resonant circuit coupled to a second end of the first winding; a second winding assembled in parallel with the primary parallel resonant circuit and forming the primary of a first transformer (T 2); and first and second primary switches each assembled in series with an output branch of the primary parallel resonant circuit and coupling said output branch to the second node, - and a secondary stage coupled to third and fourth nodes supplying the secondary voltage (E 2) and comprising: a third winding having a first end coupled to the third node; and a fourth winding coupled to a second end of the third winding and forming the secondary of the first transformer (T 2), characterized in that the first primary switch comprises first and second series-assembled transistors, and the second primary switch comprises third and fourth series-assembled transistors, the gates of the first and third transistors being coupled to a same node of application of a first DC bias voltage, the gate of the second transistor being coupled to the junction point of the third and fourth transistors, and the gate of the fourth transistor being coupled to the junction point of the first and second transistors. a third winding having a first end coupled to the third node; and a fourth winding coupled to a second end of the third winding and forming the secondary of the first transformer (T 2),