| 摘要 |
In the circuit arrangement for the high-frequency operation of a low-power low-pressure discharge lamp (LP) having a mains rectifier (2) and a half-bridge circuit, a diode (D1) is connected in series and in the DC non-conducting direction in the connecting line between the second electrode (E2) of the lamp (LP) and the positive or negative pole of the rectifier (2). Moreover, the tap (M2) between the diode (D1) and the second electrode (E2) is connected to the other pole of the mains rectifier (2) via a capacitor (C1), and a resistor (R9) is connected in parallel with the diode (D1). The circuit thus created acts as a passive harmonic filter which fulfills for the circuit arrangement the IEC regulations of class D with reference to line current harmonic content. |
