| 摘要 |
The invention relates to a blocking circuit for fly back converters, used in the continuous voltage supplies in commutation, said blocking circuit consisting of a diode (1), which is connected to an end of a supplementary winding (2) the fly back converter is provided with, in order to generate a stopping potential (u S) directly from a supply (E), the other end of the supplementary winding (2) being connected to the basis of a switch transistor (3) which is blocked by reverse polarization of its base-emitter junction, with the stopping potential (u S)
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