| 摘要 |
<p>A circuit arrangement for operating a high-pressure discharge lamp (5) having a straightened arc, comprising: at least one first (Q1) and one second electronic switch (Q2) in a first half-bridge (6); a supply voltage connection and a reference ground connection for supplying the half-bridge arrangement with a direct voltage signal (U0); a load circuit (9) which comprises a lamp choke (Li) and a blocking capacitor (7) and is coupled on one side to the half-bridge center point and on the other side to at least one terminal for connecting the high-pressure discharge lamp (5); a drive circuit (8) for providing at least one first (G1) and one second (G2) drive signal for the first (Q1) and the second electronic switch (Q2), wherein the first and second drive signal (G1, G2) are pulse-width-modulated signals having the same frequency, wherein the pulse duty factor of the two drive signals and the phase angles of the two drive signals relative to each other can be set independently of each other in each case, and the two drive signals can each be inverted in a low-frequency cycle.</p> |
