Analog-to-digital converter with a calibration function

Details Analog-to-digital converter with a calibration function Analog-to-digital converter with a calibration function

2009-07-06

2011-10-18

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S120000, C341S159000

Reexamination Certificate

active

08040263

ABSTRACT:
An analog-to-digital converter includes a reference voltage generator that outputs a reference voltage, a first comparator and a second comparator that compare the reference voltage and a voltage of an input signal and output a digital signal having a first logical value or a second logical value, and a calibrator that compares an output of the first comparator and an output of the second comparator and outputs a first offset control signal and a second offset control signal. The first comparator sets an offset value having a positive or negative polarity to an output inversion threshold level based on the first offset control signal, and the second comparator sets an offset value having a polarity opposite to the polarity set by the first comparator to an output inversion threshold level based on the second offset control signal.

REFERENCES:
patent: 6226562 (2001-05-01), Philpott
patent: 7046179 (2006-05-01), Taft et al.
patent: 7312734 (2007-12-01), McNeill et al.
patent: 7535390 (2009-05-01), Hsu
patent: 2008-054205 (2008-03-01), None

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