Circuits and methods with comparators allowing for offset...

Details Circuits and methods with comparators allowing for offset... Circuits and methods with comparators allowing for offset...

2008-07-15

2008-07-15

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S136000, C341S155000, C327S054000, C327S055000, C327S067000, C327S087000

Reexamination Certificate

active

11777905

ABSTRACT:
Circuits and methods may be improved by using ADCs that compensate for the effect of comparator input offset on comparator decisions. Offset compensation may be implemented in an ADC by using an amplifier section between the input of the ADC and a comparator section of the ADC to amplify the signals supplied to the comparator inputs and thereby reduce the effect of comparator offset on the comparator decision. The comparator section may be an autozeroing comparator section that is capable of performing an offset reduction operation to store offset compensation values at capacitors provided at its inputs. The amplifier section may be an autozeroing amplifier section having one or more amplifier stages that are capable of performing an offset reduction operation to store offset compensation values at capacitors provided at their inputs. Offset compensation may also be implemented using an autozeroing comparator section without a preceding amplifier section.

REFERENCES:
patent: 4129863 (1978-12-01), Gray et al.
patent: 4200863 (1980-04-01), Hodges et al.
patent: 4490682 (1984-12-01), Poulo
patent: 4883987 (1989-11-01), Fattaruso
patent: 5065045 (1991-11-01), Mok
patent: 5113090 (1992-05-01), Imaizumi et al.
patent: 5235333 (1993-08-01), Naylor et al.
patent: 5272395 (1993-12-01), Vincelette
patent: 5565800 (1996-10-01), Kobayashi
patent: 5589785 (1996-12-01), Garavan
patent: 5600275 (1997-02-01), Garavan
patent: 5793322 (1998-08-01), Fossum et al.
patent: 5831562 (1998-11-01), Van Auken et al.
patent: 5841126 (1998-11-01), Fossum et al.
patent: 5880691 (1999-03-01), Fossum et al.
patent: 6124819 (2000-09-01), Zhou et al.
patent: 6215333 (2001-04-01), Kuttner
patent: 6392449 (2002-05-01), Taft
patent: 6396430 (2002-05-01), Li
patent: 6429697 (2002-08-01), Amazeen et al.
patent: 6441357 (2002-08-01), Ang et al.
patent: 6567028 (2003-05-01), Huang et al.
patent: 6881942 (2005-04-01), Huang et al.
patent: 6885396 (2005-04-01), Panicacci et al.
patent: 7068319 (2006-06-01), Barna et al.
patent: 2004/0041080 (2004-03-01), Barna et al.
patent: 2004/0051802 (2004-03-01), Krymski
patent: 2004/0246030 (2004-12-01), Yang
patent: 2006/0001753 (2006-01-01), Funakoshi et al.
Phillip E. Allen and Douglas R. Holberg, CMOS Analog Circuit Design, published by Oxford University Press, Inc., 2002, pp. 484-485, no month.
PCT Search Report, PCT application No. PCT/US06/48102 dated Feb. 25, 2008.

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