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Arthur van Roermund

Bio: Arthur van Roermund is an academic researcher from Eindhoven University of Technology. The author has contributed to research in topics: CMOS & Amplifier. The author has an hindex of 25, co-authored 211 publications receiving 2239 citations.


Papers
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Journal ArticleDOI
TL;DR: A Data-Driven Noise-Reduction method is introduced to selectively enhance the comparator noise performance in a power-efficient 10/12 bit 40 kS/s SAR ADC for sensor applications.
Abstract: This paper presents a power-efficient 10/12 bit 40 kS/s SAR ADC for sensor applications. It supports resolutions of 10 and 12 bit and sample rates from DC up to 40 kS/s to accommodate a variety of sensor applications. A Data-Driven Noise-Reduction method is introduced to selectively enhance the comparator noise performance. In this way, a higher ADC resolution can be achieved with a small increase of the power consumption. A self-oscillating comparator is used to generate the bit-cycling clock internally. In this way, the ADC only requires an external clock at the sample-rate frequency. A segmented capacitive DAC with 250 aF unit elements is applied to save power and to reduce DNL errors at the same time. The implemented prototype in 65 nm CMOS occupies an area of 0.076 mm 2. For the two supported resolutions (10/12 bit), the ADC achieves an ENOB of 9.4 and 10.1 bit while consuming 72 and 97 nW from a 0.6 V supply at 40 kS/s. This leads to power efficiencies of 2.7 and 2.2 fJ/conversion-step for 10 bit and 12 bit resolution, respectively. Furthermore, the leakage power, which is below 0.4 nW, ensures that the efficiency can be maintained down to very low sample rates.

159 citations

BookDOI
01 Oct 2005
TL;DR: This paper provides an introductory tutorial of time jitter, its definitions, sources in high speed interconnect systems, and how it is transformed as it propagates from the source to the termination.
Abstract: Analog Circuit Design is based on the yearly Advances in Analog Circuit Design workshop. The aim of the workshop is to bring together designers of advanced analogue and RF circuits for the purpose of studying and discussing new possibilities and future developments in this field. Selected topics for AACD 2007 are: (1) Sensors, Actuators and Power Drivers for the Automotive and Industrial Environment (Tue 27 March) - Chaired by Herman Casier, AMI Semiconductor Fellow, Belgium; (2) Integrated PA's from Wireline to RF (Wed 28 March) - Chaired by Prof. Michiel Steyaert, Catholic University, Leuven; (3) Very High Frequency Front Ends (Thu 29 March) - Chaired by Prof. Arthur van Roermund, Eindhoven University of Technology.

142 citations

Proceedings ArticleDOI
06 Mar 2014
TL;DR: Feedback-controlled data-driven noise reduction, oversampling, chopping, chopping and dithering techniques are combined to increase both SNR and linearity in a power-efficient way, thereby extending the application range.
Abstract: Autonomous wireless sensor nodes for cloud networks require ultra-low-power electronics. In particular, sensor readout interfaces need low-speed high-precision ADCs for capturing, e.g., bio-potential signals, environmental information, or interactive multimedia. For these applications, state-of-the-art SAR ADCs can provide highly power-efficient solutions (<;10fJ/conversion-step) but with limited accuracy (SNDR <;63dB) [1,2]. Alternatively, ΔΣ ADCs offer higher precision at the cost of lower efficiency (e.g. 84dB SNDR with 54fJ/conversion-step [3]). This work bridges the existing performance gap by extending the accuracy of low-power SAR ADCs to SNDRs in the order of 70-to-80dB. Feedback-controlled data-driven noise reduction [1], oversampling, chopping [4] and dithering [5] techniques are combined to increase both SNR and linearity in a power-efficient way. Various ADC modes are supported by making these techniques individually programmable, thereby extending the application range.

121 citations

Proceedings ArticleDOI
28 Mar 2013
TL;DR: This work introduces a Data-Driven Noise-Reduction method to efficiently suppress comparator noise, applies a segmented capacitive DAC with 250aF unit elements for better efficiency and accuracy, and implements a self-oscillating comparator to locally generate the internally required oversampled clock.
Abstract: Low-power sensor applications e.g. for environmental monitoring, bio-potential recording, and wireless autonomous sensor networks require highly power-efficient ADCs, typically with resolutions of at least 10b. SAR ADCs are generally beneficial in terms of power efficiency. However, the most power-efficient designs currently lack the required accuracy for these applications [1, 2], as they are limited to 9b ENOB. Other designs that have sufficient accuracy (10b) are limited to power efficiencies above 10fJ/conv-step [3]. The aim of this work is to increase the accuracy of highly efficient SAR ADCs beyond 10b, while further improving the efficiency to 2.2fJ/conv-step. To do so, this work introduces a Data-Driven Noise-Reduction method to efficiently suppress comparator noise, applies a segmented capacitive DAC with 250aF unit elements for better efficiency and accuracy, and implements a self-oscillating comparator to locally generate the internally required oversampled clock.

116 citations

Journal ArticleDOI
TL;DR: This paper presents a low-voltage current-reuse chopper-stabilized frontend amplifier for fetal ECG monitoring that allows for individual tuning of the noise in each measurement channel, minimizing the total power consumption while satisfying all application requirements.
Abstract: This paper presents a low-voltage current-reuse chopper-stabilized frontend amplifier for fetal ECG monitoring The proposed amplifier allows for individual tuning of the noise in each measurement channel, minimizing the total power consumption while satisfying all application requirements The low-voltage current reuse topology exploits power optimization in both the current and the voltage domain, exploiting multiple supply voltages (03, 06 and 12 V) The power management circuitry providing the different supplies is optimized for high efficiency (peak charge-pump efficiency $= 90\%$ )The low-voltage amplifier together with its power management circuitry is implemented in a standard $018~\mu{\rm m}$ CMOS process and characterized experimentally The amplifier core achieves both good noise efficiency factor $({\rm NEF}=174)$ and power efficiency factor $({\rm PEF}=105)$ Experiments show that the amplifier core can provide a noise level of $034~\mu {\rm Vrms}$ in a 07 to 182 Hz band, consuming $117~\mu {\rm W}$ power The amplifier together with its power management circuitry consumes $156 ~\mu {\rm W}$ , achieving a PEF of 141 The amplifier is also validated with adult ECG and pre-recorded fetal ECG measurements

91 citations


Cited by
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01 Jan 2016
TL;DR: The design of analog cmos integrated circuits is universally compatible with any devices to read and is available in the book collection an online access to it is set as public so you can download it instantly.
Abstract: Thank you for downloading design of analog cmos integrated circuits. Maybe you have knowledge that, people have look hundreds times for their chosen books like this design of analog cmos integrated circuits, but end up in malicious downloads. Rather than enjoying a good book with a cup of coffee in the afternoon, instead they juggled with some harmful virus inside their computer. design of analog cmos integrated circuits is available in our book collection an online access to it is set as public so you can download it instantly. Our digital library spans in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the design of analog cmos integrated circuits is universally compatible with any devices to read.

1,038 citations

Journal ArticleDOI
TL;DR: This paper proposes the use of outdoor millimeter wave communications for backhaul networking between cells and mobile access within a cell, and proposes an efficient beam alignment technique using adaptive subspace sampling and hierarchical beam codebooks.
Abstract: Recently, there has been considerable interest in new tiered network cellular architectures, which would likely use many more cell sites than found today. Two major challenges will be i) providing backhaul to all of these cells and ii) finding efficient techniques to leverage higher frequency bands for mobile access and backhaul. This paper proposes the use of outdoor millimeter wave communications for backhaul networking between cells and mobile access within a cell. To overcome the outdoor impairments found in millimeter wave propagation, this paper studies beamforming using large arrays. However, such systems will require narrow beams, increasing sensitivity to movement caused by pole sway and other environmental concerns. To overcome this, we propose an efficient beam alignment technique using adaptive subspace sampling and hierarchical beam codebooks. A wind sway analysis is presented to establish a notion of beam coherence time. This highlights a previously unexplored tradeoff between array size and wind-induced movement. Generally, it is not possible to use larger arrays without risking a corresponding performance loss from wind-induced beam misalignment. The performance of the proposed alignment technique is analyzed and compared with other search and alignment methods. The results show significant performance improvement with reduced search time.

975 citations

Journal ArticleDOI
TL;DR: The suitability of millimeter wave beamforming methods, both, existing and proposed till midyear 2015, are explored, and the exciting new prospects unfolding in this domain are identified.
Abstract: The remarkable growth of wireless data traffic in recent times has driven the need to explore suitable regions in the radio spectrum to meet the projected requirements. In pursuance of this, millimeter wave communications have received considerable attention in the research fraternity. Due to the high path and penetration losses at millimeter wavelengths, antenna beamforming assumes a pivotal role in establishing and maintaining a robust communication link. Beamforming for millimeter wave communications poses a multitude of diverse challenges due to the large channel bandwidth, unique channel characteristics, and hardware constraints. In this paper, we track the evolution and advancements in antenna beamforming for millimeter wave communications in the context of the distinct requirements for indoor and outdoor communication scenarios. We expand the scope of discussion by including the developments in radio frequency system design and implementation for millimeter wave beamforming. We explore the suitability of millimeter wave beamforming methods, both, existing and proposed till midyear 2015, and identify the exciting new prospects unfolding in this domain.

557 citations

Journal ArticleDOI
TL;DR: The feasibility of mmWave massive-MIMO-based wireless backhaul for 5G UDN is discussed, and the benefits and challenges are addressed, and a digitally controlled phase shifter network (DPSN)-based hybrid precoding/combining scheme for mmWavemassive MIMO is proposed.
Abstract: The ultra-dense network (UDN) has been considered as a promising candidate for future 5G networks to meet the explosive data demand. To realize UDN, a reliable, gigahertz bandwidth, and cost-effective backhaul connecting ultradense small-cell BSs and macrocell BS are prerequisite. Millimeter-wave can provide the potential gigabit-per-second traffic for wireless backhaul. Moreover, mmWave can easily be integrated with massive MIMO for improved link reliability. In this article, we discuss the feasibility of mmWave massive-MIMO-based wireless backhaul for 5G UDN, and the benefits and challenges are also addressed. In particular, we propose a digitally controlled phase shifter network (DPSN)-based hybrid precoding/combining scheme for mmWave massive MIMO, whereby the low-rank property of the mmWave massive MIMO channel matrix is leveraged to reduce the required cost and complexity of a transceiver with a negligible performance loss. One key feature of the proposed scheme is that the macrocell BS can simultaneously support multiple small-cell BSs with multiple streams for each small-cell BS, which is essentially different from conventional hybrid precoding/combining schemes, typically limited to single-user MIMO with multiple streams or multi-user MIMO with single stream for each user. Based on the proposed scheme, we further explore the fundamental issues of developing mmWave massive MIMO for wireless backhaul, and the associated challenges, insight, and prospects to enable mmWave massive-MIMO-based wireless backhaul for 5G UDN are discussed.

418 citations

Journal ArticleDOI
TL;DR: This work discusses several key elements to enable mmWave communications in 5G, including the hybrid (digital plus analog) beamforming architecture in mmWave system, and the application of mmWave transmission with narrow beams in non-orthogonal device-todevice communication.
Abstract: Current cellular spectrum at below 3 GHz bands is experiencing severe shortage and cannot keep up with the dramatic proliferation of mobile traffic in the near future, requiring the search for innovative solutions to enable the 5G era. mmWave communications, with a possible gigabit-per-second data rate, have attracted great attention as a candidate for 5G broadband cellular communication networks. However, a complete characterization of mmWave links for 5G wireless networks still remains elusive and there are many challenges and research areas that need to be addressed. In this work we discuss several key elements to enable mmWave communications in 5G: · Channel characteristics regarding mmWave signal attenuation due to free space propagation, atmospheric gaseous and rain are explained. · The hybrid (digital plus analog) beamforming architecture in mmWave system is discussed. · The blockage effect in mmWave communications due to penetration loss and possible approaches are presented. · The application of mmWave transmission with narrow beams in non-orthogonal device-todevice communication is proposed. · mmWave transmission in the booster cell of heterogeneous anchor-booster networks. · mmWave transmission for small cell backhaul is further discussed.

401 citations