Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2011-05-24
2011-05-24
Hollington, Jermele M (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
Reexamination Certificate
active
07948257
ABSTRACT:
A method and system for testing and protecting the operability of an output module. An output channel includes a transistor having a gate, a source, and a drain. The output channel drives a load with a load voltage and a load current in dependence upon a gate drive signal applied to the gate. The system determines a voltage threshold and a current threshold and monotonically varies the gate drive signal from a starting value for a predetermined time interval while monitoring the load current and the load voltage. The system returns the gate drive signal to the starting value if any of the load voltage reaches the voltage threshold, the load current reaches the current threshold, or a predetermined time interval expires indicating the condition of the output module.
REFERENCES:
patent: 6400163 (2002-06-01), Melcher et al.
patent: 2008/0018516 (2008-01-01), Meagher
patent: 1837971 (2007-09-01), None
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European Search Report.
Creech Gerald Robert
Meagher Thomas Bruce
Ord Robert Sidney
Boyle Fredrickson LLP
Hollington Jermele M
Miller John M.
Rockwell Automation Technologies Inc.
Walbrun William R.
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