| 摘要 |
<P>PROBLEM TO BE SOLVED: To stabilize a voltage applied to a load and limit the voltage and a curent of the load with high accuracy even when the current flowing through the load of an explosion proof electronic apparatus varies. <P>SOLUTION: A booster circuit 12 is connected with an electric power source 1, and a current is supplied from the booster circuit 12 to the load 10 through resistors 4, 5. A voltage applied to the load 10 is stabilized by controlling a booster voltage of the booster circuit 12 using the voltage applied to the load 10 when the current is supplied to the load 10. Zener diodes 6, 7 are connected in parallel with the load 10 and limit the voltage applied to the load 10 to a predetermined value. The voltage applied to the load 10 and a current flowing through the load 10 are limited by the booster circuit 12, the resistors 4, 5, and the zener diodes 6, 7 with high accuracy. <P>COPYRIGHT: (C)2012,JPO&INPIT |
