INL curve correction in a pipeline ADC

Details INL curve correction in a pipeline ADC INL curve correction in a pipeline ADC

2005-09-12

2008-03-25

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Increasing converter resolution

C341S161000, C341S155000

Reexamination Certificate

active

07348906

ABSTRACT:
The present invention relates to a method and system for reducing integral non linearity errors in a pipeline Analog to Digital Converter (ADC). The invention provides in a first embodiment a method comprising the steps of: adding an analog dither signal to the analog input signal of a pipeline Analog to Digital Converter, and converting the analog input signal to a digital output signal by means of the pipeline Analog to Digital Converter. The amplitude of the analog dither signal is determined by the architecture of the Analog to Digital Converter. The invention also provides in a second embodiment a circuit comprising a pipeline analog to digital converter for converting an analog input signal to a digital output signal and a feedback circuit coupled to the converter such that the digital output signal is adapted to have an average non linearity error value of about zero LSBs.

REFERENCES:
patent: 5982313 (1999-11-01), Brooks et al.
patent: 6028546 (2000-02-01), Signell et al.
patent: 6271782 (2001-08-01), Steensgaard-Madsen
patent: 6369744 (2002-04-01), Chuang
patent: 6462685 (2002-10-01), Korkala
patent: 6784814 (2004-08-01), Nair et al.
patent: 2005/0078026 (2005-04-01), Cai

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