| 摘要 |
PROBLEM TO BE SOLVED: To prevent overcurrent for current detection resistor without using large rated current. SOLUTION: A transistor 24 and a current detection resistor R1 are serially- connected to a plurality of remore control switches RW1, RW2, RW3, RW4. A current cut-off circuit 20 is also provided which outputs a current cut-off signal from a comparator 22 to turn off the transistor 24, when a current higher than or equal to a prescribed level passes through the current detection resistor R1.
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