Digital correction of digital-to-analog converter errors in continuous-time analog-to-digital converters

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United States of America Patent

PATENT NO 12107590
APP PUB NO 20240080033A1
SERIAL NO

18049278

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Abstract

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Continuous-time (CT) analog-to-digital converters (ADCs) implementing digital correction of digital-to-analog converter (DAC) errors are disclosed. In a CT pipeline stage of a CT ADC, a CT analog input signal is sent to two different paths. A first path (a “feedforward” path) includes a cascade of a sub-ADC and a sub-DAC. A second path (a “forward” path) includes an analog delay circuit to align the delays of the input signal in the feedforward and forward paths. A combiner subtracts the output of the analog delay of the forward path from the output of the sub-DAC in the feedforward path to generate a residue signal. Devices and methods disclosed herein are based on recognition that, if the errors introduced by the sub-DAC are known, they can be corrected in the digital domain during reconstruction, achieving superior NSD and distortion performance compared to conventional approaches.

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Patent OwnerAddress
ANALOG DEVICES INTERNATIONAL UNLIMITED COMPANYBAY F1 RAHEEN INDUSTRIAL ESTATE LIMERICK CO LIMERICK V944V2

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ganesan, Asha Markham, CA 3 6
Paterson, Donald W Winchester, US 10 156
Patil, Sharvil Pradeep Toronto, CA 12 31
Shibata, Hajime Toronto, CA 54 455
Zhu, Haiyang Winchester, US 21 53

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