Patent ID: 8369109

Claim:
A self-oscillating DC/DC converter comprising: a first and a second input connection for application of an input DC voltage; a first and a second bipolar transistor, each bipolar transistor having a control electrode, a reference electrode, a working electrode, and negative feedback comprising resistors provided for the first and the second bipolar transistors; at least one first coupling capacitor; wherein a first switching junction is formed by the junction of the working electrode and the reference electrode of the first bipolar transistor, and a second switching junction is formed by the junction of the working electrode and the reference electrode of the second bipolar transistor, wherein the first and the second switching junctions are connected in series with respect to the input DC voltage; a rectifier, with an output that is coupled to a first and a second output connection in order to provide an output DC voltage; a transformer, which has a primary winding, a secondary winding and at least one control winding; wherein the primary winding is coupled between a galvanic connection of the first and the second switching junction and the at least one coupling capacitor; wherein the secondary winding is coupled to the input of the rectifier; wherein each bipolar transistor has an associated control winding which is coupled between the control electrode of a respective bipolar transistor and the galvanic connection, and at least one timer which is coupled between a respectively associated control winding and a respective control electrode; and wherein the at least one timer comprises a first non-reactive resistor, an inductance and a capacitor connected in series.