A/D converter with adaptive background calibration skip rate
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorBengt Erik Jonsson
Life of this patent
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Abstract
An A/D converter calibration apparatus of the “skip-and-fill” type includes a set of operating condition parameter sensors (100) for detecting the current operating conditions, which are represented by parameters x1, . . . , xN. The measured parameter are forwarded to an operating conditions change detector (102), which calculates a change measure and determines whether this measure exceeds or falls below a predetermined change threshold. A calibration control signal CTRL_SKIP_RT is passed to a calibration control unit (104), which sets the background calibration skip rate to a high value if the measure exceeds the threshold an to a low value if it does not exceed the threshold.
Claims20
An AID converter background calibration method of the skip-and-fill type, including the steps of
- tracking operating condition changes;
- and
- adapting background calibration skip rate to A/D converter operating conditions change rare.
An A/D converter background calibration apparatus of the skip-and-fill type, including
- means for tracking operating condition changes;
- and
- means for adapting background calibration skip rate to A/D converter operating conditions change rate.
Dependencies are inferred from the claim text.