A boost circuit is disclosed. The circuit comprises a boost transistor, a pulse width modulator coupled to the boost transistor, and a boost inductor coupled to the boost transistor and the pulse width modulator, the boost inductor including a winding which provides an auxiliary output voltage. Through...http://www.google.com/patents/US6181114?utm_source=gb-gplus-sharePatent US6181114 - Boost circuit which includes an additional winding for providing an auxiliary output voltage
