Open-circuit detecting circuit

Details Open-circuit detecting circuit Open-circuit detecting circuit

2006-06-20

2006-06-20

Lee, Diane (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of ground fault indication

C324S523000

Reexamination Certificate

active

07064553

ABSTRACT:
In an open-circuit detecting circuit, a current detecting circuit converts current flowing from a driving circuit to a load to a voltage. A comparator circuit compares the voltage with a reference voltage and outputs a signal according to a result of the comparison to a D flip-flop. An open-circuit is determined based on an output of the flip-flop, which is outputted when a clock signal indicating a falling edge of a PWM signal outputted from a PWM signal generating circuit is inputted.

REFERENCES:
patent: 4710704 (1987-12-01), Ando
patent: 5087884 (1992-02-01), Brannon
patent: 6377053 (2002-04-01), Mazzucco et al.
patent: A-9-89966 (1997-04-01), None
patent: A-11-143530 (1999-05-01), None

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