Random Swapping Dynamic Element Matching Technique for Glitch Energy Minimization in Current-Steering DAC

Shen, Meng-Hung; Tsai, Jen-Huan; Huang, Po-Chiun

doi:10.1109/tcsii.2010.2043400

Cited by 47 publications

(17 citation statements)

References 7 publications

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“…The input bits select the weights that should be combined to represent a certain digital code at the output. The choice of DAC code is important since it has been shown that it affects both static performance such as DNL [40], as well as dynamic performance measures of the DAC such as for example glitch energy [41,42]. A generalized digital-to-analog conversion performs in the memory-less (static) case the following operation…”

Section: Dac Codesmentioning

confidence: 99%

“…Figure 2.4, where a set of weights, w k , is multiplied by the input word X where each bit in X can be assigned to the values x k P t0, 1u. The thermometer code is ideal with respect to glitch performance [41,42] but for larger values of N the encoder complexity might become to large. As a trade off between glitch performance and decoder complexity we can choose to segment the converter [9], i.e., use the binary code for some of the lower significant bits and the thermometer code for the remaining of the bits.…”

Section: Dac Codesmentioning

confidence: 99%

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Design of Integrated Building Blocks for the Digital/Analog Interface

Andersson¹

2015

Linköping Studies in Science and Technology. Dissertations

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The integrated circuit has, since it was invented in the late 1950's, undergone a tremendous development and is today found in virtually all electric equipment. The small feature size and low production cost have made it possible to implement electronics in everyday objects ranging from computers and mobile phones to smart prize tags. Integrated circuits are typically used for data communication, signal processing and data storage. Data is usually stored in digital format but signal processing can be performed both in the digital and in the analog domain. For best performance, the right partition of signal processing between the analog and digital domain must be used. This is made possible by data converters converting data between the domains. A device converting an analog signal into a digital representation is called an analog-to-digital converter (ADC) and a device converting digital data into an analog representation is called a digital-to-analog converter (DAC). In this work we present research results on these data converters and the results are compiled in three different categories. The first contribution is an error correction technique for DACs called dynamic element matching, the second contribution is a power efficient time-to-digital converter architecture and the third is a design methodology for frequency synthesis using digital oscillators.The accuracy of a data converter, i.e., how accurate data is converted, is often limited by manufacturing errors. One type of error is the so-called matching error and in this work we investigate an error correction technique for DACs called dynamic element matching (DEM). If distortion is limiting the performance of a DAC, the DEM technique increases the accuracy of the DAC by transforming the matching error from being signal dependent, which results in distortion, to become signal independent noise. This noise can then be spectrally shaped or filtered out and hereby increasing the overall resolution of the system. The DEM technique is investigated theoretically and the theory is supported by measurement results from an implemented 14-bit DAC using DEM. From the investigation it is concluded that DEM increases the performance of the DAC when matching errors are dominating but has less effect at conversion speeds when dynamic errors dominate.The next contribution is a new time-to-digital converter (TDC) architecture. A TDC is effectively an ADC converting a time difference into a digital representation. The proposed architecture allows for smaller and more power efficient data conversion than previously reported and the implemented TDC prototype is smaller and more power efficient as compared to previously published TDCs in the same performance segment.The third contribution is a design methodology for frequency synthesis using digital oscillators. Digital oscillators generate a sinusoidal output using recursive algorithms. We show that the performance of digital oscillators, in terms of amplitude and frequency stability, to a large extent depends on t...

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Section: Dac Codesmentioning

confidence: 99%

Section: Dac Codesmentioning

confidence: 99%

Design of Integrated Building Blocks for the Digital/Analog Interface

Andersson¹

2015

Linköping Studies in Science and Technology. Dissertations

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“…By using this technique, the time average of equivalent component at each component position are equal or nearly equal, which reduces the effect of component differences in the circuits. DEM capable of transforming the imperfection of each 1 bit DAC into broadband noise by randomizing the position of each DAC and sum up the result so that the effect of mismatch error is averaged [3]. The connection of DEM DAC is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Current Steering Digital Analog Converter with Partial Binary Tree Network (PBTN)

Mustaffa

Lim

Teh

2017

IJEECS

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“…For the current-steering DAC operating at high speed, switch transitions will bring additional glitches energy to the output signal of the converters and degrade the DACs' dynamic characteristics, especial the spurious-free dynamic range (SFDR) [4].…”

Section: Introductionmentioning

confidence: 99%

Thermo data-weighted average dynamic element matching (DEM) encoder for current-steering DACs

Wang

Liu

et al. 2013

IEICE Electron. Express

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A novel dynamic element matching (DEM) method is presented, called Thermo Data Weighted Average (TDWA) for Nyquist-rate current-steering digital-to-analog converts (DACs). The proposed TDWA encoder technique chooses a sequence of unit current sources and increase or decrease units at different side. Thus this approach can not only reduce the switching number to minimum (as few as thermometer encoder), but also retain good ability to eliminate signal dependent distortions to achieve good linearity at high sampling frequencies.

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Random Swapping Dynamic Element Matching Technique for Glitch Energy Minimization in Current-Steering DAC

Cited by 47 publications

References 7 publications

Design of Integrated Building Blocks for the Digital/Analog Interface

Design of Integrated Building Blocks for the Digital/Analog Interface

Current Steering Digital Analog Converter with Partial Binary Tree Network (PBTN)

Thermo data-weighted average dynamic element matching (DEM) encoder for current-steering DACs

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