Patent ID: 9722501
Date: 2017-08-01
CPC Classifications: H02M

Claim:
1. A circuit comprising: a transformer including: a first switch having a first first switch terminal and a second first switch terminal; a second switch having a first second switch terminal and a second second switch terminal; a third switch having a first third switch terminal and a second third switch terminal; and a fourth switch having a first fourth switch terminal and a second fourth switch terminal; where the first primary winding terminal is coupled to the first terminal of the first switch and the first terminal of the third switch, where the second terminal of the first switch is coupled to the first terminal of the secondary winding and the first terminal of the second switch, where the second terminal of the second switch is coupled to an AC neutral line, where the second terminal of the third switch is coupled to the second terminal of the secondary winding and the first terminal of the fourth switch, and where the second terminal of the fourth switch is coupled to the AC neutral line.