Digital-to-analog conversion apparatus and method having signal calibration mechanism

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United States of America Patent

PATENT NO 12203093
APP PUB NO 20230183744A1
SERIAL NO

18106638

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Abstract

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The present invention discloses a digital-to-analog conversion apparatus having signal calibration mechanism. A DAC circuit includes conversion circuits to generate an output analog signal and an echo-canceling analog signal. An echo transmission circuit performs signal processing on an echo path to generate an echo signal. An echo calibration circuit includes odd and even calibration circuits to perform mapping according to offset tables and perform processing according to response coefficients on odd and even input parts of an input digital signal to generate odd and even calibration parts of an echo-canceling calibration signal. A calibration parameter calculation circuit generates offsets according to an error signal between the echo signal and the echo-canceling calibration signal and path information related to the echo calibration circuit. The echo calibration circuit makes the coefficients converge according to the error signal and pseudo noise transmission path information, and updates the offset tables according to the offset.

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Patent Owner(s)

Patent OwnerAddress
REALTEK SEMICONDUCTOR CORPORATIONNO 2 INNOVATION RD II HSINCHU SCIENCE PARK HSINCHU 30076

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ho, Hsuan-Ting Hsinchu, TW 37 40
Huang, Liang-Wei Hsinchu, TW 131 289
Huang, Shih-Hsiung Hsinchu, TW 139 320

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