Apparatus and method for sigma-delta analog to digital...

Details Apparatus and method for sigma-delta analog to digital... Apparatus and method for sigma-delta analog to digital...

2011-03-29

2011-03-29

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S118000, C341S143000, C341S166000, C341S167000, C341S168000

Reexamination Certificate

active

07916061

ABSTRACT:
A method and apparatus are provided for sigma-delta (ΣΔ) analog to digital conversion, the method including receiving an analog signal, sampling the received signal, comparing the sampled signal with a constant reference voltage, providing at least one high-order bit responsive to the constant reference comparison, comparing the sampled signal with a variable reference voltage, providing at least one low-order bit responsive to the variable reference comparison, and combining the at least one high-order bit with the at least one low-order bit; and the apparatus including a comparator, a first ADC portion supplying the comparator with a constant reference voltage for providing at least one high-order bit, and a second ADC portion supplying the comparator with a variable reference voltage for providing at least one low-order bit.

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patent: 6920182 (2005-07-01), Bolton, Jr.
patent: 6970118 (2005-11-01), Regier
patent: 7504977 (2009-03-01), Doorenbos et al.

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