Current controlled synchronous rectifying drive circuit

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

Reexamination Certificate

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C363S021060, C363S127000

Reexamination Certificate

active

07957163

ABSTRACT:
A current controlled synchronous rectifying drive circuit including a current transducer ST having a primary winding connected in series with a synchronous rectifier SR and having a secondary winding to detect a current signal of a synchronous rectifier SR, a signal shaping and reset circuit connected to the secondary winding of the current transducer ST to convert the synchronous rectifier SR's current signal into a voltage signal and shapes it into a pulse signal, a push-pull power amplifying circuit having an input end connected to the signal shaping and reset circuit and an output end connected to a gate of the synchronous rectifier SR to amplify a drive signal generated by the signal shaping and reset circuit to drive the synchronous rectifier SR, and a drive self-bias drive circuit having an input end connected to the secondary winding of the current transducer ST and an output end connected to the push-pull power amplifying circuit to store energy from the current transducer ST to generate a voltage source.

REFERENCES:
patent: 4502104 (1985-02-01), Mitchell
patent: 6185114 (2001-02-01), Matsumoto et al.
patent: 6462965 (2002-10-01), Uesono
patent: 6597587 (2003-07-01), Poon et al.
patent: 6813166 (2004-11-01), Chang et al.
patent: 2009/0290397 (2009-11-01), Hua et al.

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