Comparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters

Non-shaping dynamic element matching (DEM) randomization schemes are widely adopted for wideband Nyquist-rate digital-to-analog converters (DACs) within transmitter architectures. Here, randomization translates the mismatch-induced distortion into white noise from dc to <inline-formula> <te...

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Autores principales:	Shantanu Mehta, Roberto Pelliconi, Christophe Erdmann, Vincent O'Brien, Brendan Mullane
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Bandpass current-steering DEM Nyquist-DAC programmable Electric apparatus and materials. Electric circuits. Electric networks TK452-454.4
Acceso en línea:	https://doaj.org/article/36c8b80732034ba392fa2fe34a55afee
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spelling	oai:doaj.org-article:36c8b80732034ba392fa2fe34a55afee2021-11-18T00:11:43ZComparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters2644-122510.1109/OJCAS.2021.3124616https://doaj.org/article/36c8b80732034ba392fa2fe34a55afee2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9598861/https://doaj.org/toc/2644-1225Non-shaping dynamic element matching (DEM) randomization schemes are widely adopted for wideband Nyquist-rate digital-to-analog converters (DACs) within transmitter architectures. Here, randomization translates the mismatch-induced distortion into white noise from dc to <inline-formula> <tex-math notation="LaTeX">$\text{F}_{\mathrm{ s}}$ </tex-math></inline-formula>/2 range. However, the DAC performance for various bands within the Nyquist range cannot be improved using non-shaped DEMs as their inherent structure cannot be made programmable. Conversely, mismatch-shaping DEMs can be made tunable to shape the DAC errors over various signal bands, which makes them suitable for wireless transmitter applications. This paper presents the design methodology for high-order mismatch-shaping DEM architectures suitable for wideband Nyquist DACs. The challenge in designing high-order DEM structures for Nyquist DACs is to make them programmable to cover various signal bands within the Nyquist range and to operate them at high-frequencies demanded by the applications. Moreover, the stability of the high-order loop-filter within the DEM and its implementation cost is of great concern. This work details techniques to design programmable, stable, and hardware efficient high-order DEM structures for wideband Nyquist DACs. The DEM structures are implemented on an UltraScale+ FPGA device for prototyping and validation. Furthermore, the DEM design operation is validated by obtaining the measurement results interfacing with a 5-bit analog DAC.Shantanu MehtaRoberto PelliconiChristophe ErdmannVincent O'BrienBrendan MullaneIEEEarticleBandpasscurrent-steeringDEMNyquist-DACprogrammableElectric apparatus and materials. Electric circuits. Electric networksTK452-454.4ENIEEE Open Journal of Circuits and Systems, Vol 2, Pp 597-610 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Bandpass current-steering DEM Nyquist-DAC programmable Electric apparatus and materials. Electric circuits. Electric networks TK452-454.4
spellingShingle	Bandpass current-steering DEM Nyquist-DAC programmable Electric apparatus and materials. Electric circuits. Electric networks TK452-454.4 Shantanu Mehta Roberto Pelliconi Christophe Erdmann Vincent O'Brien Brendan Mullane Comparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters
description	Non-shaping dynamic element matching (DEM) randomization schemes are widely adopted for wideband Nyquist-rate digital-to-analog converters (DACs) within transmitter architectures. Here, randomization translates the mismatch-induced distortion into white noise from dc to <inline-formula> <tex-math notation="LaTeX">$\text{F}_{\mathrm{ s}}$ </tex-math></inline-formula>/2 range. However, the DAC performance for various bands within the Nyquist range cannot be improved using non-shaped DEMs as their inherent structure cannot be made programmable. Conversely, mismatch-shaping DEMs can be made tunable to shape the DAC errors over various signal bands, which makes them suitable for wireless transmitter applications. This paper presents the design methodology for high-order mismatch-shaping DEM architectures suitable for wideband Nyquist DACs. The challenge in designing high-order DEM structures for Nyquist DACs is to make them programmable to cover various signal bands within the Nyquist range and to operate them at high-frequencies demanded by the applications. Moreover, the stability of the high-order loop-filter within the DEM and its implementation cost is of great concern. This work details techniques to design programmable, stable, and hardware efficient high-order DEM structures for wideband Nyquist DACs. The DEM structures are implemented on an UltraScale+ FPGA device for prototyping and validation. Furthermore, the DEM design operation is validated by obtaining the measurement results interfacing with a 5-bit analog DAC.
format	article
author	Shantanu Mehta Roberto Pelliconi Christophe Erdmann Vincent O'Brien Brendan Mullane
author_facet	Shantanu Mehta Roberto Pelliconi Christophe Erdmann Vincent O'Brien Brendan Mullane
author_sort	Shantanu Mehta
title	Comparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters
title_short	Comparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters
title_full	Comparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters
title_fullStr	Comparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters
title_full_unstemmed	Comparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters
title_sort	comparison of high-order programmable mismatch shaping bandpass dem implementations applicable to nyquist-rate d/a converters
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/36c8b80732034ba392fa2fe34a55afee
work_keys_str_mv	AT shantanumehta comparisonofhighorderprogrammablemismatchshapingbandpassdemimplementationsapplicabletonyquistratedaconverters AT robertopelliconi comparisonofhighorderprogrammablemismatchshapingbandpassdemimplementationsapplicabletonyquistratedaconverters AT christopheerdmann comparisonofhighorderprogrammablemismatchshapingbandpassdemimplementationsapplicabletonyquistratedaconverters AT vincentobrien comparisonofhighorderprogrammablemismatchshapingbandpassdemimplementationsapplicabletonyquistratedaconverters AT brendanmullane comparisonofhighorderprogrammablemismatchshapingbandpassdemimplementationsapplicabletonyquistratedaconverters
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Comparison of High-Order Programmable Mismatch Shaping Bandpass DEM Implementations Applicable to Nyquist-Rate D/A Converters

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