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22. 发明专利

JPS6269605A SOLENOID DRIVING CIRCUIT 失效
公开(公告)号：JPS6269605A
公开(公告)日：1987-03-30
申请号：JP21071885
申请日：1985-09-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAUCHI SATOMI , NAKAMURA TAKASHI
IPC分类号： H03K17/64 , H01F7/18 , H01H47/02 , H01H47/32
摘要： PURPOSE:To contrive suppression of the heat generation on a resistor by a method wherein the resistor series-connected to a diode is short-circuited during the period in which an intermittent movement is performed. CONSTITUTION:The charging of a capacitor 53 is started at the point of time of t1 by applying an intermittent signal, the voltage of the capacitor 53 becomes approximately E at the point of time of t2, and its discharge is started from the point of time t2. Pertaining to the value Rb of a resistor 51b, it is necessary that the relation of Ra>Rb is satisfied so that there will be no hindrance even when voltage drops from the value Ra of a resistor 51a due to the effect of the forward voltage VD of a diode 52. As the terminal voltage of the capacitor 53 exceeded the threshold voltage of a gate IC 54 while an intermittent signal is supplied, a transistor 55 is in an ON state. As a result, a resistor 3 is short- circuited by the transistor 55, and the heat generating when the intermittent signal is outputted can be prevented.

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