Line breakage detection circuit comprises an arrangement of resistances connected between earth, signal and power supply lines that improves breakage detection characteristics

摘要

Line breakage detection circuit comprises a main circuit (4) and a functional circuit (101) linked by power supply (41), signal (42) and earth (43) lines with the signal and earth lines connected to second power supply (11), signal (12) and earth (13) lines. Resistors (21-23) are connected between the second power supply and earth, between the second signal line and earth and between the second power supply and earth.