Article
Engineering, Electrical & Electronic
Matthias Haeberle, Denis Djekic, Daniel Kruger, Mahdi Rajabzadeh, Maurits Ortmanns, Jens Anders
Summary: This paper proposes an integrator-differentiator transimpedance amplifier with a dc compensation using widely tunable multi-element pseudo-resistors. The amplifier features a wide dynamic range, high linearity, and large bandwidth, making it suitable for high-sensitivity applications.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Engineering, Electrical & Electronic
Jeffer Mauricio Rueda-Diaz, Evandro Bolzan, Thiago Daros Fernandes, Marcio Cherem Schneider
Summary: This paper presents the design of tunable CMOS pseudo-resistors, utilizing current sources of extremely low currents and transistors operating in subthreshold to achieve large and predictable resistance values. The effects of leakage currents from reverse-biased pn-junctions on the pseudo-resistor resistance are also evaluated. The proposed pseudo-resistor circuit was validated in a 180 nm CMOS process as part of a filter, with resistances between 180 G ohm and 700 G ohm providing adjustable low-frequency poles for a band-pass filter from 0.6 Hz to 2 Hz.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Engineering, Electrical & Electronic
Israa Y. AbuShawish, Soliman A. Mahmoud
Summary: This study introduces a bio-medical amplifier with programmable Gain and Bandwidth, capable of accommodating various types of bio-potential signals with high stability and low power consumption.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Physics, Applied
Yongshan Liu, Tong Sun, Yong Xu, Xiaojun Wu, Zhongyang Bai, Yun Sun, Helin Li, Haoyi Zhang, Kanglong Chen, Cunjun Ruan, Yuzu Sun, Yuanqi Hu, Weisheng Zhao, Tianxiao Nie, Lianggong Wen
Summary: This study demonstrated a CMOS-based active tunable THz metamaterial array, which can actively engineer the resonance frequency and phase of THz by controlling the voltage, holding potential significance for applications such as THz wireless communications, information encryption, THz compressed sensing, and imaging.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Yuzhi Hao, Mingyi Chen, Weifu Chen, Yang Zhao, Yongfu Li
Summary: An active electrode (AE) with accurately-tunable Sub-Hz high-pass-corner frequency (f(HP)) has been proposed, utilizing a PVT-insensitive pseudo-resistor (PR). Implemented in a 55nm CMOS process, the AE has a small core area and stable performance under variations in temperature.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Engineering, Electrical & Electronic
Ivan Peric, Attilio Andreazza, Heiko Augustin, Marlon Barbero, Mathieu Benoit, Raimon Casanova, Felix Ehrler, Giuseppe Iacobucci, Richard Leys, Annie Meneses Gonzalez, Patrick Pangaud, Mridula Prathapan, Rudolf Schimassek, Andre Schoening, Eva Vilella Figueras, Alena Weber, Michele Weber, Winnie Wong, Hui Zhang
Summary: The high-voltage CMOS (HVCMOS) sensors are a novel type of CMOS active pixel sensors designed for ionizing particles, implemented with deep n-well option. By biasing the substrate with high negative voltage and using lowly doped substrate, a depleted region depth of at least 30 mu m can be achieved for fast detection of electrons generated by particles.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
Stefan Reich, Dominik Fritschi, Markus Sporer, Maurits Ortmanns
Summary: This paper proposes a method for handling stimulation artifacts in neuromodulation systems. By combining blanking switches with a tuning mechanism on the pseudo-resistor based high-pass corner frequency of the frontend, the settling speed during artifact-recovery can be increased, allowing undisturbed recording to begin shortly after a stimulation event.
2022 20TH IEEE INTERREGIONAL NEWCAS CONFERENCE (NEWCAS)
(2022)
Article
Engineering, Electrical & Electronic
Marco Cavallaro, Germano Nicollini
Summary: This paper presents a new active resistor for ultra-low power applications. By using a feedback and operational amplifier topology, it accurately emulates the V-I characteristic of a component while considering process, temperature, and power supply variations. Compared to resistors available in standard CMOS technology, it achieves very high resistance values with significantly less area by using a transistor in a series configuration as a reference.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2023)
Article
Engineering, Electrical & Electronic
Xiuping Feng, Hua Wu, Libin Huang, Jia Yao, Wei Zeng, Xianguo Cao
Summary: This paper presents a resistor-less high-order curvature compensation bandgap voltage reference. A high-order curvature compensation is based on generating successive V-GS voltages with different temperature characteristics, which are used to cancel thermal nonlinearity the first- and higher-order terms of the transistor voltage V-EB. The proposed bandgap reference achieves the best temperature coefficient of 2.37 ppm/°C with a supply voltage of 5 V.
CIRCUITS SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Mehdi Ashayeri, Mohammad Yavari
Summary: In this paper, a tunable front-end amplifier is introduced for neural recording implants. It is capable of amplifying neural signals with different frequencies.
MICROELECTRONICS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Adriana C. Sanabria-Borbon, Edgar Sanchez-Sinencio
Summary: This work discusses the synthesis and design methodology of high-order and frequency-tunable low-pass active-R filter architectures for multi-standard wireless applications. The filters presented in this work have the largest tuning range without linearity degradation and the smallest area per tuning range ratio, with competitive FoM when operating at high frequencies.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Computer Science, Artificial Intelligence
Zhiyan Cui, Na Lu, Weifeng Wang
Summary: This paper introduces a novel pseudo loss active learning method to reduce the cost of labeling in visual tracking tasks and achieve competitive tracking results by selecting the most informative and least redundant data for training, combining pseudo loss with human labeling. Extensive experiments demonstrate that the PLAL method outperforms baseline and recent active learning approaches with only 3% of labeled data.
PATTERN RECOGNITION
(2022)
Article
Computer Science, Artificial Intelligence
Zhiyan Cui, Na Lu, Weifeng Wang
Summary: This paper proposes a pseudo loss active learning (PLAL) method for visual tracking tasks, aiming to reduce the labor and time required for manual labeling by selecting informative and non-redundant training data. The PLAL method generates pseudo labels based on a tracking model and computes pseudo loss to measure the uncertainty of the target spatial context. Experimental results demonstrate the effectiveness of PLAL compared to baseline and other active learning approaches.
PATTERN RECOGNITION
(2022)
Article
Multidisciplinary Sciences
Cheon Woo Moon, Youngji Kim, Jerome Kartham Hyun
Summary: Researchers have developed an active structural color technology for display applications. By electrochemically depositing and dissolving copper on a platinum electrode, they were able to achieve reversible color switching and control. The modulation of copper occupancy in the slits allowed for changes in color interference, highlighting the potential of this technology for reflective display applications.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Aleksandr Vasjanov, Vaidotas Barzdenas
Summary: Zero-ohm resistors, or jumpers, are commonly used in early RF prototypes to find optimal engineering solutions or create application-specific hardware configurations. However, the potential for signal loss and interference in RF circuits needs to be considered. This paper proposes a quantitative characterization of standard surface-mount package jumpers and solder wires in high-frequency applications using TDR and S-parameter measurements. Results show minimal impact on attenuation up to 5 GHz.
Article
Engineering, Electrical & Electronic
Francesco Zanetto, Vittorio Grimaldi, Fabio Toso, Emanuele Guglielmi, Maziyar Milanizadeh, Douglas Aguiar, Miltiadis Moralis-Pegios, Stelios Pitris, Theoni Alexoudi, Francesco Morichetti, Andrea Melloni, Giorgio Ferrari, Marco Sampietro
Summary: This article describes how to control multiple photonic components independently using a combination of dithering technique and non-invasive light probes. It extends the standard technique by introducing orthogonal dithering signals and discusses the concept of frequency re-use to limit the complexity of control systems in cascaded architectures. An automated feedback strategy is presented to tune and lock photonic devices in their transfer functions, with trade-offs discussed in detail to provide design guidelines. Experimental demonstrations validate the proposed control architecture in different scenarios and applications.
IET OPTOELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Marco Giacometti, Francesca Milesi, Pietro Lorenzo Coppadoro, Alberto Rizzo, Federico Fagiani, Christian Rinaldi, Matteo Cantoni, Daniela Petti, Edoardo Albisetti, Marco Sampietro, Mariagrazia Ciardo, Giulia Siciliano, Pietro Alano, Brigitte Lemen, Joel Bombe, Marie Therese Nwaha Toukam, Paul Fernand Tina, Maria Rita Gismondo, Mario Corbellino, Romualdo Grande, Gianfranco Beniamino Fiore, Giorgio Ferrari, Spinello Antinori, Riccardo Bertacco
Summary: Malaria, caused by a protozoan parasite, remains a significant global health issue. Current diagnostic methods have limitations, leading to the development of a new diagnostic tool, TMek, which shows promising potential for accurate and rapid malaria diagnosis.
Article
Optics
Alessandro Perino, Francesco Zanetto, Matteo Petrini, Fabio Toso, Francesco Morichetti, Andrea Melloni, Giorgio Ferrari, Marco Sampietro
Summary: In this study, a transparent photoconductor integrated on waveguides is presented, achieving high sensitivity and transparency through bias voltage adjustment or local tuning.
Article
Biophysics
Paola Piedimonte, Laura Sola, Marina Cretich, Alessandro Gori, Marcella Chiari, Edoardo Marchisio, Piero Borga, Riccardo Bertacco, Andrea Melloni, Giorgio Ferrari, Marco Sampietro
Summary: We have developed a biosensing system that can detect viruses through serological analysis based on impedance variation. The system has high sensitivity and can be easily adapted to different pathogens and diseases.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Optics
Ioannis Roumpos, Themistoklis Chrysostomidis, Vittorio Grimaldi, Francesco Zanetto, Fabio Toso, Peter De Heyn, Yoojin Ban, Joris Van Campenhout, Giorgio Ferrari, Marco Sampietro, Francesco Morichetti, Andrea Melloni, Theonitsa Alexoudi, Nikos Pleros, Miltiadis Moralis-Pegios, Konstantinos Vyrsokinos
Summary: This study presents a silicon transmission and routing interconnect system that is resilient to temperature and wavelength shifts. The system utilizes a feedback circuitry to protect the operating point of the photonic building blocks and employs a locking strategy based on ring resonator modulators' transfer function. Experimental results demonstrate the system's robustness to unstable environments and fabrication variations.
Article
Optics
Maziyar Milanizadeh, SeyedMohammad SeyedinNavadeh, Francesco Zanetto, Vittorio Grimaldi, Christian De Vita, Charalambos Klitis, Marc Sorel, Giorgio Ferrari, David A. B. Miller, Andrea Melloni, Francesco Morichetti
Summary: This paper introduces a novel adaptive multibeam receiver that can separate and simultaneously detect multiple beams sharing the same wavelength and polarization in the optical domain. By using a programmable integrated photonic processor and a two-dimensional array of optical antennas, the separation of beam pairs with different directions and overlapping spatial modes is achieved.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Alessandro Trenti, Martin Achleitner, Florian Prawits, Bernhard Schrenk, Hauke Conradi, Moritz Kleinert, Alfonso Incoronato, Francesco Zanetto, Franco Zappa, Ilaria Di Luch, Ozan Cirkinoglu, Xaveer Leijtens, Antonio Bonardi, Cedric Bruynsteen, Xin Yin, Christian Kiessler, Harald Herrmann, Christine Silberhorn, Mathieu Bozzio, Philip Walther, Hannah C. Thiel, Gregor Weihs, Hannes Huebel
Summary: This article presents the results of the Quantum Technology Flagship project UNIQORN in the field of integrated photonics for quantum communication applications. Different integration platforms, including indium phosphide, polymer, and CMOS-compatible silicon platforms, were used to manufacture components and sub-systems for quantum communication devices. The indium phosphide platform was used to produce a transmitter chip for quantum key distribution, while the polymer platform was utilized for engineering non-classical light sources. Additionally, a quantum random number generator and a transimpedance amplifier based on gallium arsenide high electron mobility transistors were also fabricated.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Vittorio Grimaldi, Francesco Zanetto, Fabio Toso, Ioannis Roumpos, Themistoklis Chrysostomidis, Alessandro Perino, Matteo Petrini, Francesco Morichetti, Andrea Melloni, Nikos Pleros, Miltiadis Moralis-Pegios, Konstantinos Vyrsokinos, Giorgio Ferrari, Marco Sampietro
Summary: This paper demonstrates the possibility of automatically stabilizing the working condition of an integrated Silicon Photonics microring modulator with a novel dithering-based control scheme. The proposed feedback strategy leverages a real-time acquisition of the modulator non-linear transfer function (TF) and operates by setting the target locking point to the zero of the TF second derivative, i.e. where the ring slope is maximum. The control performances, made possible by an FPGA-based platform ensuring a 30 ms response time, are assessed in a 50 Gbit/s routing scenario, demonstrating effective compensation of wavelength and thermal variations and successful transmission even in demanding environments.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Matteo Petrini, Seyedmohammad Seyedinnavadeh, Vittorio Grimaldi, Maziyar Milanizadeh, Francesco Zanetto, Giorgio Ferrari, Francesco Morichetti, Andrea Melloni
Summary: This Letter proposes an integrated topology that overcomes the bandwidth-delay product limit. The device utilizes multiple parallel Mach-Zehnder Interferometers (MZIs), offering easier control and a larger bandwidth compared to ring resonator-based solutions. Measurements in both the time and frequency domains demonstrate the functionality of this architecture.
Article
Chemistry, Physical
Giulio Tavani, Chiara Barri, Erfan Mafakheri, Giorgia Franzo, Michele Celebrano, Michele Castriotta, Matteo Di Giancamillo, Giorgio Ferrari, Francesco Picciariello, Giulio Foletto, Costantino Agnesi, Giuseppe Vallone, Paolo Villoresi, Vito Sorianello, Davide Rotta, Marco Finazzi, Monica Bollani, Enrico Prati
Summary: Recent advancements in QKD protocols have explored the use of erbium-doped LEDs as nonlaser sources for quantum key distribution. Silicon LEDs based on electroluminescence of Er:O complexes in Si have been fabricated on a 220 nm SOI wafer. The Er:O diodes showed emission rates of 5 x 10^6 photons/s at 1550 nm at room temperature, and their integration on the SOI platform allows for the development of silicon photon sources suitable for arbitrary-statistic-tolerant QKD protocols.
Article
Computer Science, Hardware & Architecture
Michele Castriotta, Enrico Prati, Giorgio Ferrari
Summary: A fully integrated CMOS readout operating at cryogenic temperature for semiconductor spin qubits is developed and tested, which can resolve a variation of the sensing current of 250 pA with a submicrosecond time resolution and a fidelity of 99.86%. Our solution does not require off-chip components and the handling of microwave signals, providing a more compact and reliable readout system.
IEEE SOLID-STATE CIRCUITS LETTERS
(2023)
Article
Chemistry, Analytical
Piero Borga, Francesca Milesi, Nicola Peserico, Chiara Groppi, Francesco Damin, Laura Sola, Paola Piedimonte, Antonio Fincato, Marco Sampietro, Marcella Chiari, Andrea Melloni, Riccardo Bertacco
Summary: Integrated optical biosensors are gaining attention for their use in lab-on-chip platforms. Opto-Magnetic biosensing allows off-line optical measurement of tiny variations in refractive index, leading to low detection limits and fast measurement times.
Proceedings Paper
Engineering, Electrical & Electronic
Simona Achilli, Nguyen H. Le, Guido Fratesi, Nicola Manini, Giovanni Onida, Marco Turchetti, Giorgio Ferrari, Takahiro Shinada, Takashi Tanii, Enrico Prati
Summary: We demonstrate the functionalization of silicon vacancies through single ion implantation of Ge atoms, forming stable GeV complexes, for position control of defects and electronic properties suitable for room temperature operations. Quantum transport measurements, supported by theoretical calculations, show differences in conductivity effects of disorder and temperature compared to conventional dopants.
2021 SILICON NANOELECTRONICS WORKSHOP (SNW)
(2021)