Self-calibrating digital-to-analog converter and method thereof

Details Self-calibrating digital-to-analog converter and method thereof Self-calibrating digital-to-analog converter and method thereof

2008-01-24

2009-06-09

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Converter calibration or testing

C341S136000, C341S144000

Reexamination Certificate

active

07545295

ABSTRACT:
A digital-to-analog converter improves differential non-linearity by performing a calibration of at least one weighted cell in response to a calibration command. The digital-to-analog converter includes a group of weighted cells, a tunable cell having a tunable weight controlled by a tuning word, and a calibration cell to generate a combined output signal in response to a digital input word, the calibration command, and a calibration sequence. The digital-to-analog converter also includes a calibration circuit configured to sample and subsequently process the combined output signal to establish the tuning word in accordance with the calibration command and the calibration sequence.

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