Article
Engineering, Electrical & Electronic
Alison E. Hake, Chuming Zhao, Wang-Kyung Sung, Karl Grosh
Summary: The study introduces a piezoelectric MEMS accelerometer designed for auditory prostheses, providing analytic models for sensitivity and noise to optimize sensor designs. An experimental device with high sensitivity and low input noise was tested, showing promising results for potential applications in auditory prostheses.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Rafel Perello-Roig, Jaume Verd, Sebastia Bota, Jaume Segura
Summary: This paper introduces a transimpedance amplifier designed for CMOS-MEMS resonators, which can achieve low power consumption, low noise, and stable performance at high frequencies. Through experimental characterization, detailed electromechanical parameter extraction for three MEMS resonators has been conducted, providing data support for MEMS-CMOS circuit co-design.
Article
Engineering, Electrical & Electronic
Mohammad Khaleqi Qaleh Jooq, Fereshteh Behbahani, Mohammad Hossein Moaiyeri
Summary: This paper introduces an ultra-efficient recycling folded cascode operational transconductance amplifier, which utilizes two positive feedbacks to enhance input transconductance and output impedance, while reducing power consumption by operating near the threshold. Simulation results show low power consumption, reasonable slew rate response, and high gain. Additionally, a capacitive readout circuit and a transimpedance amplifier for MEMS/NEMS applications are proposed to evaluate performance.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Xiang Tian, Wei Sheng, Zhanshe Guo, Weiwei Xing, Runze Tang
Summary: A comb-type capacitive accelerometer based on silicon carbide microstructure was investigated in this study, showing superior performance compared to conventional silicon-based sensors. It has the advantages of low weight, small volume, and low cross-coupling, with a higher natural frequency than silicon(111) accelerometers. The accelerometer's resistive force consists of viscous damping and elastic damping components, with viscous damping dominating at low frequency and elastic damping dominating at high frequency.
Article
Engineering, Electrical & Electronic
Meysam Daeichin, Ronald N. Miles, Shahrzad Towfighian
Summary: This study demonstrates the feasibility of obtaining electrical read-out data from a capacitive MEMS accelerometer with a repulsive electrode configuration, allowing for large-stroke vibrations of microstructures without the pull-in failure of conventional accelerometers. The MEMS device has high mechanical sensitivity, with the ability to use large bias voltages for enhanced resolution and tunable frequency range.
IEEE SENSORS JOURNAL
(2021)
Article
Materials Science, Characterization & Testing
K. Gomathi, R. Sakthivel, S. Joseph John Marshal, V. G. Pratheep
Summary: This paper presents the application, design, and fabrication process of an accelerometer, achieving certain performance indicators through the optimization of design parameters and experimental verification.
JOURNAL OF TESTING AND EVALUATION
(2021)
Article
Chemistry, Analytical
Chenggang Wang, Yongcun Hao, Zheng Sun, Luhan Zu, Weizheng Yuan, Honglong Chang
Summary: This paper proposes a method of lowering the stiffness of capacitive-based microelectromechanical systems (MEMS) sensors by using softened beams achieved through electrostatic assembly. The experiments demonstrate that the stiffness of the accelerometer is reduced by 43% and the sensitivity is increased by 72.6% with the softened beams. The result is a significant reduction in noise and bias instability of the accelerometer. The technique of electrostatic assembly-based stiffness softening is proven to be effective and applicable to various types of MEMS devices.
Article
Chemistry, Analytical
Xianshan Dong, Yun Huang, Ping Lai, Qinwen Huang, Wei Su, Shiyuan Li, Wei Xu
Summary: A method for decomposing offset in a MEMS capacitive accelerometer was proposed in the study, which quantitatively analyzed the compositions of the offset and conducted experimental verification. The results indicated that by decomposing the offset, the major source could be identified, providing valuable insights for reducing offset and enhancing accelerometer performance.
Article
Engineering, Electrical & Electronic
Mahsa Pournia, Mohammadreza Kolahdouz, Morteza Fathipour, Hesam Zare Zadegan
Summary: In this study, an empirical model was developed to predict the impact of substrate resistivity on MEMS capacitive accelerometer parameters, including rest capacitance, offset, output noise and scale factor. A stability analysis was also conducted to analyze the influence of substrate doping concentration on the performance of MEMS capacitive accelerometers. The experimental results showed a good agreement with the model predictions.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Peng Peng, Wu Zhou, Lun Li, Jiangbo He, Bei Peng, Huijun Yu, Xiaoping He
Summary: This study investigates the drift of MEMS accelerometers stored at room temperature for one year through finite-element analysis simulation and experiments. A comprehensive FEA model is established to simulate the deformation of the sensor package structure, and drift models for the scale factor and bias of the accelerometer are built. The simulation results are validated through testing and recording the outputs of packaged accelerometers. The findings provide meaningful guidance for the application of MEMS accelerometers.
IEEE SENSORS JOURNAL
(2023)
Article
Automation & Control Systems
Ivar Koene, Sampo Haikonen, Tuomas Tiainen, Joni Keski-Rahkonen, Mikael Manngard, Raine Viitala
Summary: Microelectromechanical systems accelerometers have opened new possibilities for vibration monitoring of rotating machinery, enabling measurement of lateral and torsional vibration. This article presents an on-shaft wireless universal measurement unit with a two-sensor configuration to accurately measure the frequencies of torsional and lateral vibration.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Engineering, Electrical & Electronic
Longjie Zhong, Shubin Liu, Donglai Xu
Summary: This article proposes a correlated double amplifying (CDA) technique to reduce the noise of voltage control readout circuit and improve power efficiency. Compared with traditional correlated double sampling (CDS) technique, CDA technique does not sacrifice driving ability and bandwidth. The experimental results demonstrate that CDA technique can improve power efficiency while maintaining low cost.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Electrical & Electronic
Cheng Li, Bo Yang, Xiang Zheng, Zhenyu Sun, Luqiang Zhou, Xin Huang, Xin Guo
Summary: In this work, a portable MEMS accelerometer applicable to seismic-grade measurements has been fabricated and characterized. The accelerometer operates on a deformable grating-based MEMS interferometer, and employs a new MEMS out-of-plane sensing chip with low natural frequency and stress. The evaluation results of the fabricated prototype show high voltage sensitivity and noise performance, making it a promising device for seismic-grade applications.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Multidisciplinary
Ru Li, Zakriya Mohammed, Mahmoud Rasras, Ibrahim (Abe) M. Elfadel, Daniel Choi
Summary: This study presents the design, optimization, fabrication, and characterization of a compact MEMS accelerometer with high sensitivity. Finite element analysis is used to determine mode shape and frequency, while scanning electron microscope and capacitance-voltage measurements confirm device functionality. The electrical sensitivity remains constant over a certain frequency range, demonstrating the effectiveness of the device.
Article
Chemistry, Multidisciplinary
Mohammad Mousavi, Mohammad Alzgool, Benyamin Davaji, Shahrzad Towfighian
Summary: This paper presents two solutions for improving the performance of MEMS triboelectric vibration sensors in contact-separation mode. The first solution involves using a warped MEMS diaphragm constrained on its edges, which provides larger displacement and voltage output. The second solution involves adding constraints on the edge of the diaphragm, which increases charge density and voltage generation. These solutions show promising results in terms of sensitivity and signal-to-noise ratio improvement.
Article
Chemistry, Multidisciplinary
Ignacio Gimeno, Wenzel Kersten, Maria C. Pallares, Pablo Hermosilla, Maria Jose Martinez-Perez, Mark D. Jenkins, Andreas Angerer, Carlos Sanchez-Azqueta, David Zueco, Johannes Majer, Anabel Lostao, Fernando Luis
Article
Education, Scientific Disciplines
Carlos Sanchez-Azqueta, Esther Cascarosa, Santiago Celma, Cecilia Gimeno, Concepcion Aldea
INTERNATIONAL JOURNAL OF ELECTRICAL ENGINEERING EDUCATION
(2020)
Article
Physics, Applied
Soraya Sangiao, Jose Ignacio Morales-Aragones, Irene Lucas, Pilar Jimenez-Cavero, Luis Morellon, Carlos Sanchez-Azqueta, Jose Maria De Teresa
Summary: An optimized growth of magnetic layer/non-magnetic layer stacks can improve the spin-to-charge conversion efficiency. Values for the spin Hall angle and the spin-diffusion length in Bi were determined in YIG/Bi stacks, and the influence of aging on the efficiency was studied through spin pumping experiments on samples exposed to ambient conditions for up to 150 days.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Multidisciplinary
Victor Rollano, Marina C. de Ory, Christian D. Buch, Marcos Rubin-Osanz, David Zueco, Carlos Sanchez-Azqueta, Alessandro Chiesa, Daniel Granados, Stefano Carretta, Alicia Gomez, Stergios Piligkos, Fernando Luis
Summary: Superconducting hybrid systems are becoming an increasingly important platform for research in quantum information processing. The study reports a highly cooperative coupling between the nuclear spin of an Yb(III) molecular complex and a superconducting microwave resonator, which could be used for the implementation and readout of qudits. Cooperative coupling to all electronic and most nuclear spin transitions of the Yb-173(III) nuclear spin states in the [Yb(trensal)] molecule has been achieved, a crucial step for implementing qudit protocols with molecular spins using a hybrid architecture.
COMMUNICATIONS PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Miguel Garcia-Bosque, Abel Naya, Guillermo Diez-Senorans, Carlos Sanchez-Azqueta, Santiago Celma
Summary: In this article, the suitability of a wide set of oscillators as true random number generators (TRNGs) and physically unclonable functions (PUFs) is studied. By introducing external signals, 2730 oscillators are analyzed without having to resynthesize the code each time. The results show that ring oscillators behave closest to an ideal TRNG, while some newly proposed oscillators in this article have high reproducibility and uniqueness as PUFs.
IEEE OPEN JOURNAL OF THE INDUSTRIAL ELECTRONICS SOCIETY
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
G. Diez-Senorans, M. Garcia-Bosque, C. Sanchez-Azqueta, S. Celma
Summary: In this paper, the performance of configurable physically unclonable functions based on ring oscillators (CRO-PUFs) implemented in FPGA is analyzed. The impact of differences in detailed routing at the LUT level is studied.
PRIME 2022: 17TH INTERNATIONAL CONFERENCE ON PHD RESEARCH IN MICROELECTRONICS AND ELECTRONICS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
M. Garcia-Bosque, R. Aparicio, G. Diez-Senorans, C. Sanchez-Azqueta, S. Celma
Summary: This paper analyzes the influence of the chosen locations of ring oscillators on the performance of a physically unclonable function (PUF). Five different selection strategies are proposed and compared for constructing a PUF using a small set of locations out of a larger set. The analysis shows that the quality of the PUF, especially in terms of uniqueness, can be greatly affected depending on the selection strategy.
PRIME 2022: 17TH INTERNATIONAL CONFERENCE ON PHD RESEARCH IN MICROELECTRONICS AND ELECTRONICS
(2022)
Proceedings Paper
Education, Scientific Disciplines
A. M. Lopez-Torres, J. Lobera, C. Sanchez-Azqueta, F. J. Torcal-Milla
Summary: This research provides a collection of multimedia materials for teaching electromagnetism in first-year university courses, aiming to bridge the gap between theory and real-world applications to enhance student learning. Students can build simple devices and connect their experimental work to theoretical lessons using the audiovisual materials and accompanying questions provided. The multimedia format of the teaching materials promotes students' autonomous learning due to its accessibility, immediacy, and ubiquity.
XV INTERNATIONAL CONFERENCE OF TECHNOLOGY, LEARNING AND TEACHING OF ELECTRONICS (TAEE 2022)
(2022)
Article
Computer Science, Information Systems
Guillermo Diez-Senorans, Miguel Garcia-Bosque, Carlos Sanchez-Azqueta, Santiago Celma
Summary: This article focuses on well-known PUF candidates based on ring oscillator delay, studying the impact of different digitization algorithms on their security properties. A new family of digitization schemes named k-modular is proposed, exhibiting uniformity in response distribution and high entropy density.
Proceedings Paper
Engineering, Electrical & Electronic
G. Royo, A. D. Martinez-Perez, C. Sanchcz-Azqueta, C. Aldea, S. Celma
Summary: This technique increases the sensitivity of optical receivers by manufacturing the photodiode in multiple pieces and connecting a transimpedance amplifier to each piece. The results show significant improvement in sensitivity and transimpedance without the need for additional modifications or compensation techniques. Compatible with any TIA design, this technique offers increased signal-to-noise ratio.
2021 IEEE 12TH LATIN AMERICA SYMPOSIUM ON CIRCUITS AND SYSTEM (LASCAS)
(2021)
Review
Education & Educational Research
Esther Cascarosa, Carlos Sanchez-Azqueta, Cecilia Gimeno, Concepcion Aldea
Summary: Science education has shifted towards building mental models that represent scientific reality. While model-based science teaching has shown satisfactory results at school levels, there is a lack of research on acquiring models in higher education, particularly in the context of teaching physics at universities. This review aims to provide a starting point for future research in this area.
JOURNAL OF APPLIED RESEARCH IN HIGHER EDUCATION
(2021)
Review
Computer Science, Information Systems
Diego F. Paredes-Paliz, Guillermo Royo, Francisco Aznar, Concepcion Aldea, Santiago Celma
Article
Chemistry, Analytical
Guillermo Royo, Carlos Sanchez-Azqueta, Concepcion Aldea, Santiago Celma
