Self calibrating current reference

Data processing: measuring – calibrating – or testing – Calibration or correction system – Circuit tuning

Reexamination Certificate

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Details

C702S064000, C324S601000

Reexamination Certificate

active

06885958

ABSTRACT:
The present invention relates to a current reference system comprising a selectively activatable high current reference circuit operable to generate a reference calibration circuit when activated and a low current calibrated reference current circuit operable to generate a reference current having a value based upon a control data. The system further comprises a control circuit operable to activate the selectively activatable high current reference circuit during a calibration period. The control circuit is further operable to vary a characteristic of the low current calibrated reference current circuit in a predetermined fashion while comparing another characteristic of the low current calibrated reference current circuit to a predetermined value. The control circuit then identifies a calibration condition based on the comparison, and generates the control data associated therewith.

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