Digital-to-analog conversion apparatus and method having signal calibration mechanism
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United States of America
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Jan 28, 2025
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Sep 28, 2023
app pub date -
Feb 3, 2023
filing date -
Feb 3, 2023
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Abstract
The present invention discloses a digital-to-analog conversion apparatus having signal calibration mechanism is provided. A digital-to-analog conversion circuit includes conversion circuits to generate an output analog signal and echo-canceling analog signals. An echo transmission circuit processes an echo-transmitting path to generate an echo signal. An echo calibration circuit generates an output calibration signal and echo-canceling calibration signals according to an input digital circuit through calibration circuits corresponding to the conversion circuits. A calibration parameter calculating circuit generates a plurality of offsets according to an error signal of the echo signal relative to the calibration signals and path information related to the echo calibration circuit. The echo calibration circuit makes response coefficients converge according to the error signal and pseudo-noise transmission path information from the digital-to-analog conversion circuit to the echo transmission circuit, and updates codeword offset table according to the offset.
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