Patent ID: 7751213

Claim:
A self-driven synchronous DC-DC converter circuit, comprising: an input circuit comprising a switching device configured for selectively generating a pulsed DC input voltage responsive to an input switch control signal, said pulsed DC input voltage comprising a plurality of DC voltage pulses; an output circuit coupled to said input circuit, said output circuit comprising an active device having a device input node, a device output node, and a device control node, said device control node responsive to a control voltage for selectively varying a conductivity between said device input node and said device output node; and a control circuit coupled to said device control node and configured for generating said control voltage responsive to said pulsed DC input voltage; wherein said control voltage is synchronized with said pulsed DC input voltage, and varies non-linearly during an interval between said DC voltage pulses for selectively reducing said conductivity in accordance with a non-linear function following each of said voltage pulses.