A 108 dB SNR, 1.1 mW Oversampling Audio DAC With A Three-level DEM Technique

Nguyen, Khiem; Bandyopadhyay, Abhishek; Adams, Bob; Sweetland, Karl; Baginski, P.

doi:10.1109/jssc.2008.2006314

Cited by 39 publications

(23 citation statements)

References 7 publications

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“…A large variety of DEM DACs have been published with different properties and applications [8]- [20]. However, they all operate on the same underlying principle.…”

Section: Introductionmentioning

confidence: 99%

Why Dynamic-Element-Matching DACs Work

Galton

2010

IEEE Trans. Circuits Syst. II

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This jump-start tutorial brief explains the principle that underlies all of the published mismatch-scrambling and mismatch-shaping dynamic-element-matching (DEM) digital-toanalog converters (DACs). It explains the apparent paradox of how an all-digital algorithm can cause analog component mismatches to introduce spectrally shaped noise instead of nonlinear distortion, even though the algorithm has no knowledge of the actual mismatches. The concept is first explained in the context of a discrete-time three-level DEM DAC. The results are then generalized to an arbitrary number of levels, to segmented DEM DACs, and to continuous-time DEM DACs.Index Terms-Digital-to-analog converter (DAC), dynamic element matching (DEM), mismatch scrambling, mismatch shaping.

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“…A large variety of DEM DACs have been published with different properties and applications [8]- [20]. However, they all operate on the same underlying principle.…”

Section: Introductionmentioning

confidence: 99%

Why Dynamic-Element-Matching DACs Work

Galton

2010

IEEE Trans. Circuits Syst. II

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“…The 4 th order VFB DEM achieves on average a 10dB improvement over the conventional 2 nd order DEM and a 25dB improvement when compared the thermometer coded DAC. [2,8,13,14] that use alternative modulator and DEM schemes. The DAC presented in this work exhibits high DR performance for a narrow bandwidth specification.…”

Section: Measurement and Resultsmentioning

confidence: 99%

VLSI-SoC: Advanced Research for Systems on Chip

2012

IFIP Advances in Information and Communication Technology

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Abstract. Direct Digital Synthesis (DDS) systems generate fine frequency resolution signals over a broad spectrum that are used in a wide variety of applications such as multi-mode RF, communications, measurements and test. A high performance DDS band-pass Digital to Analog Converter (DAC) architecture and implementation is presented that delivers high spectral purity over a narrow-band response. The low power D/A Converter is portable to standard CMOS processes and designed to achieve over 100dB narrow-band SFDR performance using Sigma-Delta (∑Δ) modulation and multi-bit current steering techniques. A 3 rd order digital ∑Δ modulator is combined with a 4 th order digital Dynamic Element Matching (DEM) block to shape the noise while calibrating for process mismatch variations. A low silicon area output stage is used to deliver a high performance specification.

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“…Their resolution, in particular, which is related to the SoC specifications, can be regarded as the ultimate accuracy goal for the proposed reference. Moreover, no specific ADC/DAC architecture is assumed, even though mostly digital, low-voltage, low-power, oversampling ADCs and DACs, achieving a high resolution with a reduced silicon area occupancy, like those proposed in [18], [22], [23] and others currently being developed, can be preferred to take full advantage of the proposed approach.…”

Section: A Hardware Architecturementioning

confidence: 99%

A Digital-Based Virtual Voltage Reference

Crovetti

2015

IEEE Trans. Circuits Syst. I

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A novel virtual reference concept is introduced in this paper to design accurate, mostly digital, software-defined, process-supply-and-temperature (PVT)-independent voltage references suitable to replace conventional analog reference circuits in present day, low voltage, aggressively scaled, mainly digital integrated systems. The operation and the performance of references based on the proposed approach are tested by computer simulations and experiments carried out on a proof-of-concept, microcontroller-based prototype, reporting a measured thermal drift of 16 in a range from 10 to 100 and a line regulation of 0.15%/V. The advantages in terms of costs and performance of the proposed digital references in comparison with state-of-the-art analog solutions are finally discussed.Index Terms-Digital bandgap circuit, digital-based analog circuits, PVT-independent reference, virtual voltage reference.

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A 108 dB SNR, 1.1 mW Oversampling Audio DAC With A Three-level DEM Technique

Cited by 39 publications

References 7 publications

Why Dynamic-Element-Matching DACs Work

Why Dynamic-Element-Matching DACs Work

VLSI-SoC: Advanced Research for Systems on Chip

A Digital-Based Virtual Voltage Reference

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