COULOMB COUNTER WITH OFFSET CALIBRATION

This disclosure describes techniques for compensating for amplifier drift. An amplifier is configured to generate an output that triggers a charge counter to generate a charge count value based on a charge count signal. A current digital-to-analog converter (IDAC) is coupled to the amplifier and con...

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Bibliographische Detailangaben
Hauptverfasser:	Ni, Jinhua, Li, Ailing
Format:	Patent
Sprache:	eng
Schlagworte:	AMPLIFIERS BASIC ELECTRONIC CIRCUITRY ELECTRICITY
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	This disclosure describes techniques for compensating for amplifier drift. An amplifier is configured to generate an output that triggers a charge counter to generate a charge count value based on a charge count signal. A current digital-to-analog converter (IDAC) is coupled to the amplifier and configured to provide an offset current to a first input of the amplifier. An offset correction circuit is configured to: determine whether a duty cycle associated with the amplifier exceeds a specified threshold and generate a signal to cause the MAC to adjust the value of the offset current to compensate for amplifier drift based on determining whether the duty cycle exceeds the specified threshold.