Averaging analog-to-digital converter with shared capacitor...

Details Averaging analog-to-digital converter with shared capacitor... Averaging analog-to-digital converter with shared capacitor...

2006-07-11

2006-07-11

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000

Reexamination Certificate

active

07075472

ABSTRACT:
An analog-to-digital converter has one or more first stage comparators for generating a set of first stage comparator digital outputs, and a set of first stage comparator analog outputs upon comparing a voltage input with a set of voltage references, a switch network for selectively controlling the first stage comparator analog outputs to pass, a ratio capacitor network shared by the first stage comparators for receiving the first stage comparator analog outputs and providing a second set of intermediate analog outputs for identifying a level of the voltage input among a set of intermediate voltage levels between two voltage references, a number of second stage comparators for outputting the number of second stage comparator digital outputs, and a decoder subsystem for receiving the second stage comparator digital outputs to produce a bits of least significant bits. The ratio capacitor network is shared by more than two first stage comparators.

REFERENCES:
patent: 6169508 (2001-01-01), Edwards
patent: 6885396 (2005-04-01), Panicacci et al.
patent: 6954169 (2005-10-01), Min

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