biased when power switch swa is opened the reverse voltage across it rises at a rate determined by the prevailing breaking current and the circuit capacitances the voltage change appears across all coils of the power transformer and the voltage across synchronous rectifier switch sra falls toward zero driven by the output coil current when the voltage u sra is about 2v the inverting input mp 1 of controller fd 1 identifies it via resistor r 1 and diode d 2 as logic state 0 and output a goes up after a delay d 1 the circuit functions in a corresponding manner during the second half cycle when output b of the regulating circuit emits a pulse from the timing diagram in fig5 it can be seen that the circuit does not permit the occurrence of a control situation that would result in an internal short circuit and that all delays leading to body diode conduction are minimized and adaptable to changing operational conditions and the variation of component tolerances no schottky diodes need to be connected in parallel with the rectifier switches sra and srb as these are properly controlled in all operational situations in the foregoing the action of the circuit 15 has been described with reference to a traditional push pull implementation the principle described can also be used with traditional half bridge and full bridge topologies but it will exhibit its best advantages when employed in an integrated magnetic push pull converter implemented using a single ferrite core the principle can also be modified to suit the forward topology.