Calibrating capacitor mismatch in a pipeline ADC

Details Calibrating capacitor mismatch in a pipeline ADC Calibrating capacitor mismatch in a pipeline ADC

2005-05-10

2005-05-10

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Converter calibration or testing

C341S155000, C341S172000

Reexamination Certificate

active

06891486

ABSTRACT:
An on-chip calibration circuit which can dynamically (i.e., in operational environment) measure the capacitor mismatch in an ADC using sampling capacitors to sample an input signal and a feedback capacitor (in combination with an amplifier) for amplification. The measured values can be used to generate accurate digital codes representing analog signal samples. The calibration circuit connects the capacitors to various voltage levels and measures the mismatch levels by examining various signals (e.g., the digital codes) generated in such situations.

REFERENCES:
patent: 5510789 (1996-04-01), Lee
patent: 5825316 (1998-10-01), Kuttner
patent: 6169502 (2001-01-01), Johnson et al.
patent: 6184809 (2001-02-01), Yu
patent: 6489914 (2002-12-01), Jones et al.

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