Analog-to-digital converter with a plurality of conversions

Details Analog-to-digital converter with a plurality of conversions Analog-to-digital converter with a plurality of conversions

2007-01-31

2008-08-19

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000

Reexamination Certificate

active

07414563

ABSTRACT:
An A-D converter includes an A-D converter circuit, a D-A converter circuit, a subtraction circuit, a second amplifier circuit, a reference voltage control circuit, a timing control circuit18, an amplifier control circuit19, and an output circuit. The reference voltage control circuit controls the range of reference voltage in the A-D converter according to a step or stage of conversion in the A-D converter. In particular, the reference voltage control circuit performs a control so that the range of reference voltage in the A-D converter circuit at the time of conversion in the third step is larger than that in the first and the second step.

REFERENCES:
patent: 6414619 (2002-07-01), Swanson
patent: 6859158 (2005-02-01), Wada et al.
patent: 6900749 (2005-05-01), Tani et al.
patent: 6909391 (2005-06-01), Rossi
patent: 7002507 (2006-02-01), Kobayashi et al.
patent: 7084803 (2006-08-01), Kobayashi et al.
patent: 7154426 (2006-12-01), Tani et al.
patent: 7224306 (2007-05-01), Kobayashi
patent: 9-275342 (1997-10-01), None

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