Magnetic　amplifier　is　a　simple　and　high　efficiency　post　regulator　in　auxiliary　output　of　the　multiple　output　power　supplies.　The　schottky　diodes　must　be　replaced　by　synchronous　rectifiers(SRs)　in　low　voltage　output　converters　to　improve　the　efficiency.　In　this　paper,　a　new　gate-driver　scheme　is　proposed　to　maximize　the　efficiency　of　the　synchronous　rectifiers　combined　with　magnetic　amplifier　post　regulating.　The　forward　converters　with　active　clamp　were　chosen　for　the　application.　The　new　gate-driver　scheme　optimizes　MOSFET　turn-on　and　turn-off　delays　in　synchronous　rectifiers　by　measuring　the　current　that　pass　through　the　magnetic　amplifier.　The　additional　current　transformer　detects　the　current　and　tries　to　prevent　SRs　body-diode　conduction　and　continuously　adjusts　dead-time　delays　to　minimize　the　conduction　time　interval.　The　operation　principle　will　be　explained　first.　The　design　guidelines　and　consideration　are　given　following.　A　prototype　of　the　proposed　converter　has　been　built　and　the　experimental　results　are　also　presented.