A switchmode DC to AC converter, and particularly a master-slave half-bridge converter. The slave half-bridge power converter is controlled by a lower power self-oscillating half-bridge master converter. More particularly, the invention pertains to a high frequency ballast for gas discharge devices,...http://www.google.ca/patents/US5097183?utm_source=gb-gplus-sharePatent US5097183 - Master-slave half-bridge DC-to-AC switchmode power converter
