| 摘要 |
<p>A circuit for energizing a load includes an inverter which provides a feedback signal to a rectifier for substantially linear operation of the rectifying diodes. In one embodiment, a ballast includes a rectifier and a resonant inverter which energizes a lamp. The inverter generates a current that is split between a first path which includes the lamp and a second path which includes a feedback capacitor. A feedback path, which includes a feedback inductor, extends from the feedback capacitor to a point between the rectifying diodes. The feedback capacitor and feedback inductor resonate in series to provide a reactive feedback signal for achieving substantially linear operation of the diodes. In another embodiment, the lamp current flows to a clamp circuit for limiting the lamp current to a predetermined level.</p> |
