Patent ID: 8067973

Claim:
A driver circuit for driving a synchronous rectifier FET, comprising: a transconductance amplifier having a first input coupled to a first DC offset, a second input coupled to the drain of the synchronous rectifier FET, and an output coupled to the gate of the synchronous rectifier FET; and a comparator having a first input coupled to a second DC offset, a second input coupled to the drain of said synchronous rectifier FET, and an output coupled to the gate of the synchronous rectifier FET via a switch, wherein the second input of the transconductance amplifier and the second input of the comparator are coupled to the drain of the synchronous rectifier FET such that the second input of the transconductance amplifier and the second input of the comparator receive a substantially identical signal from the drain of the synchronous rectifier FET, and wherein the output of the transconductance amplifier is not coupled to the gate of the synchronous rectifier FET via the switch.