Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2011-08-16
2011-08-16
Nguyen, Vincent Q (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
C324S500000
Reexamination Certificate
active
07999559
ABSTRACT:
Digital fault detection circuit with an input circuit having input and output, wherein a first signal state at the input causes a predetermined signal state at the output and a second signal state at the input leaves the output floating; a signal line with signal line input and output, wherein the signal line input is coupled to the output of the input circuit; a keeper circuit coupled to the signal line output and configured to keep the signal line at the predetermined signal state, after the signal state at the input has changed from the first signal state to the second signal state; and a fault detector cell, which is coupled to the signal line between the signal line input and the signal line output and which is configured to change the state of the signal line which is otherwise kept by the keeper circuit, in response to a fault.
REFERENCES:
patent: 3992636 (1976-11-01), Kiffmeyer
patent: 2007/0182575 (2007-08-01), Kunemund
patent: 10 2005 058 238 (2007-06-01), None
Dickstein & Shapiro LLP
Infineon - Technologies AG
Nguyen Vincent Q
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