| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that an electric discharge control switch may have been broken due to the passage of a large current through the electric discharge control switch when a large current passes due to a short circuit etc. during the delay time of a delay circuit in an overcurrent detecting circuit provided with the delay circuit. <P>SOLUTION: In an overcurrent detecting circuit 20a having a delay circuit 25 for controlling the on-time of an electric discharge control switch 113, by generating continuous and analog changes in the delay time, the delay circuit 25 is capable of speedily turning the electric discharge control switch 113 into an off-state correspondingly to a sudden change in the state of the electric discharge control switch 113. Thereby, it is possible to prevent a large current from passing the electric discharge control switch 113 for a long time and prevent the electric discharge control switch 113 from being broken. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
