Patent ID: 7009855

Claim:
A synchronous rectifier circuit, comprising: a power transformer ( 12 ; 18 ) having a primary side ( 18 a ) including a first and a second primary winding sections and a secondary side ( 18 b ) including a first and a second secondary winding sections, a rectifier circuit ( 32 ) at the secondary side of the power transformer ( 12 ; 18 ), which rectifier circuit having a first and a second electronic switches ( 34 , 36 ) associated with the first and the second secondary winding sections ( 18 b ), respectively, a first and a second current transforming means ( 48 ) associated with the first and the second secondary winding sections, respectively, and a first and a second drive circuits ( 50 , 58 ) for the first and second electronic switches ( 34 , 36 ), respectively, each current transforming means ( 48 ) generating first and second currents dependent on the current of the secondary winding section ( 18 b ) and each drive circuit ( 50 , 58 ) comprising a first branch ( 50 , 52 ) and a second branch ( 54 , 56 ) to receive the first and second currents, respectively, generated by the current transforming device ( 48 ), and the first branch comprising a transconductance choke ( 52 ).