Patent ID: 7684221
Filing Date: 2010-03-23
Classification: H02M

Abstract:
1. A circuit comprising a transformer configured to galvanically isolate signals and to have a pulse-width modulated voltage applied to a primary side thereof, a secondary side of the transformer being connected to a second circuit comprising: a first series connection including a first and a second rectified diode, a first central potential of the first series connection being connected to a first end of a secondary coil of the transformer; a second series connection including a first and a second capacitor, a second central potential of the second series connection being connected to a second end of the secondary coil of the transformer, the second series connection being connected in parallel with the first series connection; and a load including a comparator connected in parallel with the first and second series connections, wherein a first input signal of the comparator is derived from the second central potential, the first input signal derived from the second central potential being dependent on the pulse-width modulated voltage.