| 摘要 |
PURPOSE:To accurately stabilize a current to a specific load in a selective manner by detecting a load current to the specific load necessary for stabilization, and feeding back the detected value to the drive switch side circuit of a high voltage transformer to form constant current or voltage. CONSTITUTION:High voltages are supplied from terminals P1, P2 to respective high voltage loads through a converter transformer T1. The variation in the load current applied from the terminal P2 to the load is detected by a current transformer T2, smoothed by a diode D2 and a condenser C4, further inverted by an inverter Q3, and then applied to the negative side input of a comparator Q1. A drive pulse applied to the terminal P3 is integrated by an integrating circuit Q2 to produce a signal, which is applied to the positive side input of the comparator Q1. A transistor Tr2 is controlled by the output of the comparator Q1, a transistor Tr1 is further controlled thereby so as to stabilize the high voltage of the terminal P2. |
