Noise-shaped segmented digital-to-analog converter

Details Noise-shaped segmented digital-to-analog converter Noise-shaped segmented digital-to-analog converter

2011-06-28

2011-06-28

Lauture, Joseph (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S144000

Reexamination Certificate

active

07969340

ABSTRACT:
A segmented digital-to-analog converter (DAC) is disclosed. In the present invention, the segmented DAC of the present invention comprises a signal component processing stage and a plurality of noise component processing stages cascaded with the signal component processing stage. A noise component of an input word for the DAC is split into a plurality of portions to be processed. By doing so, effect due to gain mismatch(es) in an analog portion of the DAC can be effectively reduced without significantly increasing DAC cells used in the DAC.

REFERENCES:
patent: 5977899 (1999-11-01), Adams
“A 113-dB SNR oversampled DAC with segmented noise-shaped scrambling,”IEEE J. Solid State Circuits, vol. 33, No. 12, pp. 1871, Dec. 1998.

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