Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2005-09-27
2005-09-27
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
C324S1540PB
Reexamination Certificate
active
06949935
ABSTRACT:
A system and method of testing switch functionality of a tunable capacitor array is disclosed. A built in test (BIT) circuit provides digital device for testing the functionality of a programmable switch capacitor array circuit. The method and system provides for switching a capacitor switch of a switch capacitor array between on and off, switching a test enable switch of a BIT circuit between on and off, pulling an internal node of the BIT circuit either high or low using a current source, and determining whether the internal node has been pulled either high or low. In addition, the method and system provides for making a pass or fail determination based on a determined state of the internal node.
REFERENCES:
patent: 5276446 (1994-01-01), Sellars
patent: 5581563 (1996-12-01), Penza et al.
Jensen Brent R.
Stenger Joseph D.
Cypress Semiconductor Corp.
He Amy
Nguyen Vincent Q.
Wagner , Murabito & Hao LLP
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