ELECTRONIC DEVICE, OPEN CIRCUIT DETECTING SYSTEM, AND DETECTING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To determine the status of an object circuit regardless of the noise generated by various circuit elements and their interactions with one another.

SOLUTION: An open circuit detecting system is configured to connect with an object circuit 120 for obtaining an electrical signal through a virtual ground induced by characteristic impedance of a parasitic capacitor 130 of the object circuit 120 and determining whether the object circuit 120 is open according to the electrical signal. The electrical signal obtained by the open circuit detecting system indicates that the capacitance of the parasitic capacitor 130 in a normal circuit is greater than the capacitance of the parasitic capacitor in open circuit.

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