| 摘要 |
<p>The present invention proposes a circuit for detecting the function status of a lamp having at least one electrode, which circuit comprises: a voltage divider having a middle point, for outputting a voltage signal reflecting the function status of the lamp; a unilaterally conductive unit, coupled with said at least one electrode and coupled with said middle point, for blocking either a positive component or a negative component of a current signal flowing from the lamp towards the voltage divider. In addition, the invention also proposes a ballast using such a detection circuit. The present invention can decrease the unnecessary sensitivity of the known detection circuit and detect the function status of a lamp more accurately.</p> |
