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Differentiating lymph node status in malignant melanoma: the role of apparent diffusion coefficient ratio in diffusion-weighted MRI - a prospective diagnostic study. [PDF]
BMC Med ImagingKohnen MPE +11 more
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A novel MRI diffusion metric 'slow diffusion coefficient' (SDC) for diagnosing isocitrate dehydrogenase (IDH) genotype in diffuse gliomas: initial promising results. [PDF]
BMC Med ImagingZheng WY +6 more
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IEEE Transactions on Circuits and Systems II: Express Briefs, 2017
The fundamental limitation of Nyquist analog-to-digital converter (ADC) architectures toward high speed is metastability. It refers to the inability of a latched comparator to produce a valid decision in a certain available time. This issue is usually severe in high-speed successive approximation register (SAR) ADCs due to their serial conversion ...
Chi-Hang Chan +5 more
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The fundamental limitation of Nyquist analog-to-digital converter (ADC) architectures toward high speed is metastability. It refers to the inability of a latched comparator to produce a valid decision in a certain available time. This issue is usually severe in high-speed successive approximation register (SAR) ADCs due to their serial conversion ...
Chi-Hang Chan +5 more
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Proceedings of the 21st edition of the great lakes symposium on Great lakes symposium on VLSI, 2011
In this paper, we discuss and analyze the effectiveness of redundancy (also known as digital error correction) and its relationship with DAC settling time, comparator delay, digital logic delay and sampling rate in successive-approximation-register (SAR) ADCs.
Albert H. Chang +2 more
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In this paper, we discuss and analyze the effectiveness of redundancy (also known as digital error correction) and its relationship with DAC settling time, comparator delay, digital logic delay and sampling rate in successive-approximation-register (SAR) ADCs.
Albert H. Chang +2 more
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SAR ADC algorithm with redundancy
APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems, 2008This paper describes a redundant algorithm for a highly reliable Successive Approximation Register (SAR) ADC where mistakes of comparator decision can be digitally-corrected. We generalize a conventional non-binary search algorithm which requires more conversion steps in the SAR ADC than the binary search algorithm, and clarify which decision errors ...
Tomohiko Ogawa +5 more
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IEEE Journal of Solid-State Circuits, 2016
The linearity of the vast majority of the ADC topologies is limited by the linearity of the circuit elements employed in their design, such as resistors and capacitors. This paper presents a charge-mode SAR ADC architecture that uses only highly non-linear metal-oxide-semiconductor capacitors (MOSCAPs) as the DAC capacitance elements. The non-linearity
Taimur Gibran Rabuske +1 more
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The linearity of the vast majority of the ADC topologies is limited by the linearity of the circuit elements employed in their design, such as resistors and capacitors. This paper presents a charge-mode SAR ADC architecture that uses only highly non-linear metal-oxide-semiconductor capacitors (MOSCAPs) as the DAC capacitance elements. The non-linearity
Taimur Gibran Rabuske +1 more
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ADC trends and impact on SAR ADC architecture and analysis
2015 IEEE Custom Integrated Circuits Conference (CICC), 2015The performance of ADCs continues to improve with process scaling. For low to moderate resolutions, SAR ADCs deliver the best energy efficiency. Interleaved SAR converters have become popular for very high sampling speeds. The SAR assisted scheme has dramatically improved the energy efficiency of higher resolution pipeline ADCs.
Jeffrey Fredenburg, Michael P. Flynn
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Modified BER Test for SAR ADCs
2020 IEEE International Test Conference in Asia (ITC-Asia), 2020This paper presents a new post-processing method to estimate the real bit error rate (BER) of successive approximation register (SAR) analog-to-digital converters (ADCs) based on the conventional test scheme. Conventional testing method acquires BER based on difference between two measured output codes, rather than between a measured output code and ...
Chia-Chuan Li, Soon-Jyh Chang
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Predictive Noise Shaping SAR ADC
2019 IEEE International Symposium on Circuits and Systems (ISCAS), 2019In this paper, a novel predictive first-order noise shaping SAR ADC is proposed. Noise-shaping (NS) SAR ADCs have recently gained much attention due to their low power requirements and wide dynamic range. However, for any oversampled ADC, there is a range that each sample will be within guaranteed by input bandwidth.
Jyotindra R. Shakya +2 more
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Passive reference-sharing SAR ADC
Microelectronics Journal, 2015Charge-redistribution successive approximation register (SAR) analog-to-digital converters (ADCs) are widely used for their simple architecture, inherent low-power consumption and small footprint. Several techniques aiming to reduce the power consumption, to increase the speed, and to reduce the capacitance spread have been developed, such as splitting
Enrique Alvarez-Fontecilla +1 more
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