A circuit for energizing a load includes an inverter which provides a feedback signal to a rectifier for substantially linear operation of the rectifying diodes. In one embodiment, a ballast includes a rectifier and a resonant inverter which energizes a lamp. The inverter generates a current that is...http://www.google.ca/patents/US6100645?utm_source=gb-gplus-sharePatent US6100645 - Ballast having a reactive feedback circuit
