A generalized multi-resonant switch that combines current-mode and voltage-mode resonant switches. Application of the multi-resonant switch in zero-voltage switched multi-resonant converters results in reduction of the voltage stress to the switching transistor, increase of the load range and reduction...http://www.google.com/patents/US4841220?utm_source=gb-gplus-sharePatent US4841220 - Dc-to-Dc converters using multi-resonant switches
