| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the wrong operation of a direction indicating lamp blinking device due to the chattering signal by forming a noise filter of a resistor and a capacitor, which is provided in a terminal of a comparator. SOLUTION: In a switch input unit 211, a terminal 211E of a non-reverse input terminal of a comparator 211A is provided with a resistor 211B and a capacitor 211C so as to form a noise filter, and eliminates the noise, which intrudes the comparator 211A. The capacitor 211C uses the parasitic capacity generated between conductive lines close to each other inside of an integrated circuit 21. A delay circuit 211F is connected to a terminal 21G of the integrated circuit 21 so as to prevent the intrusion of the chattering signal to be generated with the operation of a turn signal switch 3 and a relay 23, and the wrong operation of the switch input unit 211 is thereby prevented.</p> |
