| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an abnormal current monitoring circuit in which the targets of reducing the number of components (reducing the material cost), saving the packaging space (reducing the size) and reducing the man-hour of adjustment can be achieved. <P>SOLUTION: The abnormal current monitoring circuit comprises a section for detecting the currents being fed to a plurality of n loads of a circuit to be monitored as n potential difference outputs, a DC amplifying section for amplifying the n potential difference outputs respectively, a peak detecting section for detecting the highest and lowest values of n amplified output voltages from the DC amplifying section, and a comparing section having an upper limit judging circuit for judging whether the highest and lowest voltages are lower than a specified upper limit or not and a lower limit judging circuit for judging whether they are higher than a specified lower limit or not and delivering an alarm signal by judging that the circuit to be monitored is in abnormal state if the judgment results represent a voltage between the upper limit and the lower limit. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
