Synchronous power rectifier

A synchronous power rectifier comprising:

• a source providing a flow of current at periodic intervals;
• a first semiconductor device comprising a bipolar transistor connected to receive said flow of current from said source and being synchronously controlled by said source to pass said flow of current of one polarity during said period intervals;
• a capacitor;
• an inductor connected to said source and said capacitor to receive said flow of current and provide a charging current for said capacitor;
• a second semiconductor device connected to provide a second flow of current from said inductor of said polarity into said capacitor during time intervals wherein said first semiconductor device is not providing flow of current from said source wherein,
• said source provides a plurality of periodic current flows in a sequence, said synchronous power rectifier further including
• a plurality of first semiconductor devices each connected to receive one of said plurality of current flows,
• said inductor includes a secondary winding and providing a turn-off signal, said synchronous power rectifier further comprising
• means to selectively apply said turn-off signal to the particular first semiconductor device in conduction during the immediately preceding periodic interval.