| 摘要 |
<p>The invention relates to an electronic ballast for operating a lamp (11), particularly a gas discharge lamp, comprising: at least two voltage terminals (2, 3) for connecting a supply voltage, a transformer (23), the primary winding (24) of which is connected to the first voltage terminal (3), wherein a saturation of said primary winding (24) occurs only if the supply voltage is present at the first voltage terminal (3), and further comprising a circuit for the detection of the saturation or change of impedance of said primary winding (24).</p> |
