| 摘要 |
<p>Prior to a load (50) being activated, a first capacitive network (44, 46) and the load (50) are operationally in parallel with each other, and the first capacitive network and a first inductor (34) are in series with each other. A second inductor (62) is magnetically coupled to the first inductor to boost a voltage supplied to the load. When the load (50) is activated, a second capacitive network (40, 42), the load (50), and the first inductor (34) are operationally in series with each other. In a further embodiment, the first inductor (34) and a second inductor (62) are not capacitively coupled together, rather the second inductor (62) generates lagging current at a first node (76) to cancel leading current generated by the first capacitive network (44, 46). Heating of the load is accomplished by the use of a cathode heater winding (64) in operational connection with at least one of the cathodes (52, 54). <IMAGE></p> |
