Common mode sampling mechanism for residue amplifier in switched current pipeline analog-to-digital converters

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United States of America Patent

PATENT NO 9503119
APP PUB NO 20150349795A1
SERIAL NO

14714602

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Abstract

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A switched current pipeline analog-to-digital converter (ADC) integrated circuit. The integrated circuit comprises a track and hold circuit (T/H) and a residue amplifier. The T/H is configured to generate a differential output of the T/H based on an analog input. The residue amplifier is coupled to the T/H, configured to capture a sample of a common mode signal of the differential output of the T/H during a periodic pulse interval, wherein the pulse interval is less than half of the time duration of the period of the pulse, configured to generate a corrected input common mode feedback signal based in part on the sample of the common mode signal of the differential output of the T/H, and configured to generate a differential output of the residue amplifier based on the differential output of the T/H and based on the corrected input common mode feedback signal.

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Patent Owner(s)

Patent OwnerAddress
TEXAS INSTRUMENTS INCORPORATEDP O BOX 655474 MS 3999 DALLAS TX 75265

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Coulon, Jesse Richardson, US 6 6
El-Chammas, Manar Dallas, US 11 37
Kimura, Shigenobu Dallas, US 23 689
Li, Xiaopeng Plano, US 112 190

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