Patent ID: 7894213

Claim:
A direct current (DC) to DC converter comprising: a DC voltage input terminal for receiving a first DC voltage, a first transistor comprising a base electrode connected to the DC voltage input terminal, a transformer comprising a primary winding, an auxiliary winding, and a secondary winding, the DC voltage input terminal capable of being grounded via the primary winding, a collector electrode and an emitter electrode of the first transistor in series, a pulse generating circuit comprising a first capacitor, a sampling resistor, a zener diode, and a first diode, a terminal of the auxiliary winding capable of being grounded via the inverted first diode, the non-inverted zener diode, the sampling resistor, and the first capacitor, and the other terminal of the auxiliary winding capable of being grounded, and a second transistor comprising an emitter electrode connected to a cathode of the zener diode, a collector electrode connected to a base electrode of the first transistor, and a base electrode capable of being connected to ground.