Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2006-10-17
2006-10-17
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
C324S765010, C324S537000
Reexamination Certificate
active
07123039
ABSTRACT:
An integrated circuit (IC) measures a voltage at an interface of the IC. The IC comprises voltage reference, comparator, and control circuits. The voltage reference circuit provides reference voltages responsive to a control input. The comparator circuit compares a first reference voltage with a voltage at the interface. The control circuit receives an output of the comparator and adjusts the control input to provide a second reference voltage closer to the voltage at the interface. A method for measuring voltage at an IC interface comprises generating a first reference voltage, monitoring the voltage at the interface from within the IC, comparing the first reference and interface voltages, generating a second reference voltage responsive to a result of the comparing, replacing the first reference voltage with the second reference voltage, and repeating until an applied reference voltage is substantially equal to the voltage at the interface.
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