Jesus Arias - Valladolid, ES Peter Kiss - Basking Ridge NJ, US Johannes G. Ransijn - Wyomissing Hills PA, US James D. Yoder - Leola PA, US
Assignee:
Agere Systems Inc. - Allentown PA
International Classification:
H03M 1/10
US Classification:
341120, 341118, 341143, 341144
Abstract:
Digital correction of multibit ADAC nonlinearities for error feedback DACs is provided. The integral nonlinearity (INL) error of the multibit ADAC is estimated (on line or off line) by a low-resolution calibration ADC (CADC) and stored in a random-access memory (RAM) table. The INL values are then used to compensate for the ADAC's distortion in the digital domain. When this compensation is combined with mismatch-shaping techniques such as DWA, the resolution requirement for CADC can be relaxed significantly. The implementation of the proposed correction circuit for error-feedback modulators is inherently simple, since the correction only needs a digital summation without any additional digital filtering.
Digital Correction Of Nonlinearity Errors Of Multibit Delta-Sigma Digital To Analog Converters
Jesus Arias - Valladolid, ES Peter Kiss - Basking Ridge NJ, US Johannes G. Ransijn - Wyomissing Hills PA, US James D. Yoder - Leola PA, US
Assignee:
Agere Systems Inc. - Allentown PA
International Classification:
H03M 1/10
US Classification:
341120, 341118, 341143, 341144
Abstract:
Digital correction of multibit ADAC nonlinearities for error feedback DACs is provided. The integral nonlinearity (INL) error of the multibit ADAC is estimated (on line or off line) by a low-resolution calibration ADC (CADC) and stored in a random-access memory (RAM) table. The INL values are then used to compensate for the ADAC's distortion in the digital domain. When this compensation is combined with mismatch-shaping techniques such as DWA, the resolution requirement for CADC can be relaxed significantly. The implementation of the proposed correction circuit for error-feedback modulators is inherently simple, since the correction only needs a digital summation without any additional digital filtering.
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Western Carolina University 1980 - 1982
Bachelors, Bachelor of Science, Business Administration
Catawba Valley Community College 1977 - 1980
Associates, Accounting