发明名称 |
LOAD DRIVING CIRCUIT |
摘要 |
<p>The invention relates to a load drive circuit wherein an emergency shutdown switch for forcible interruption and a normal shutdown switch for normal current control are disposed in series in a load power supply circuit. An emergency shutdown switch (SWA) and a normal shutdown switch (SWB) are disposed in series in a load power supply circuit. The normal shutdown switch (SWB) is periodically driven off for a short time by means of a control signal (X) from a normal shutdown switch control circuit (30), and the fact that this is off is monitored by an output signal (AC) from a monitor circuit (40). If the output signal (AC) is not generated for an off-delay time or more of an off-delay circuit (21), then a control signal (Z) for an emergency shutdown switch control circuit (20) is stopped thereby forcibly switching off the emergency shutdown switch (SWA). <IMAGE></p> |
申请公布号 |
EP0865055(A1) |
申请公布日期 |
1998.09.16 |
申请号 |
EP19970926238 |
申请日期 |
1997.06.12 |
申请人 |
THE NIPPON SIGNAL CO. LTD. |
发明人 |
SAKAI, MASAYOSHI;FUTSUHARA, KOICHI |
分类号 |
H01H9/54;B30B15/28;F16P3/12;F16P3/14;H01H47/00;H03K17/18;(IPC1-7):H01H9/54 |
主分类号 |
H01H9/54 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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