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US 2010/0164471 A1Published application
Calibration of programmable i/o components using a virtual variable external resistor
AssigneeM2000
InventorJean Barbier
Life of this patent
Estimating the term…
Abstract
Embodiments provide systems, methods, and integrated circuits having a calibration structure with a calibration component and a measurement structure coupled to the calibration component. The measurement structure is configured to vary a current through the calibration component until a voltage of the calibration component equals an operation voltage. The variable current is a function of at least the operation voltage and a resistance of a resistor external to the measurement structure.
Claims26
A system comprising:
- a calibration structure comprising a calibration component;
- and
- a measurement structure coupled to the calibration component, the measurement structure configured to vary a variable current through the calibration component until a voltage of the calibration component equals an operation voltage, the variable current being a function of at least the operation voltage and a resistance of a resistor external to the measurement structure.
A method comprising:
- setting a desired operating voltage in a measurement structure, the desired operating voltage equivalent to an operational voltage of a programmable input/output (I/O) pad;
- and
- varying a current through a calibration component of a calibration structure, different from the programmable I/O pad, until a voltage across the model component equals the desired operating voltage, the current a function of an external resistor having a stable resistance and the desired operating voltage.
An integrated circuit comprising:
- a calibration structure comprising one or more calibration components;
- and
- a measurement structure operatively coupled to the calibration structure, the measurement structure configured to vary a variable current through the calibration component until a voltage of the calibration component equals a desired operation voltage, the variable current being a function of at least the desired operation voltage and a resistance of a resistor external to the integrated circuit.
Dependencies are inferred from the claim text.