Circuit and method for detecting faulty diode

Details Circuit and method for detecting faulty diode Circuit and method for detecting faulty diode

2011-06-21

2011-06-21

Nguyen, Ha Tran T (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S762010

Reexamination Certificate

active

07965096

ABSTRACT:
A circuit for detecting faulty diode is disclosed, wherein the circuit for detecting faulty diode comprises a diode having an anode connecting to a voltage supply; a first switch having a first end connected to a cathode of the diode; a testing current source connected to the second end of the first switch; a one-shot circuit connected to a control end of the first switch, by which an output signal is generated and transmitted to the control end; and a comparator connected to a reference voltage input terminal for receiving a reference voltage and connected to the second end of the first switch. When the one-shot circuit closes the first switch for a maintaining period to urge the comparator comparing the reference voltage with the voltage applied to the second end of the first switch, whereby a signal used to discriminate whether the diode is fail or not is generated.

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