Research Output 1993 2019

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2019

A 0.9-V Analog-to-Digital Acquisition Channel for an IoT Water Management Sensor Node

Serra, H., Bastos, I., De Melo, J. L. A., Oliveira, J. P., Paulino, N., Nefzaoui, E. & Bourouina, T., 1 Oct 2019, In : IEEE Transactions on Circuits and Systems II: Express Briefs. 66, 10(SI), p. 1678-1682 5 p., 8789645.

Research output: Contribution to journalArticle

Water management
Sensor nodes
Capacitors
Water
Bandpass filters
Evolutionary algorithms
Modulators
Thermal noise
Linear equations
Genetic algorithms

Built-in self test of high speed analog-to-digital converters

Santin, E., Oliveira, L. B. & Goes, J., 1 Dec 2019, In : IEEE Instrumentation and Measurement Magazine. 22, 6, p. 4-10 7 p., 8917897.

Research output: Contribution to journalArticle

File
self tests
Built-in self test
analog to digital converters
Digital to analog conversion
high speed

Combined Organic Photovoltaic Cells and Ultra Low Power CMOS Circuit for Indoor Light Energy Harvesting

Batista, D., Oliveira, L. B., Paulino, N., Carvalho, C., Oliveira, J. P., Farinhas, J., Charas, A. & Dos Santos, P. M., 15 Apr 2019, In : Sensors (Basel, Switzerland). 19, 8

Research output: Contribution to journalArticle

Semiconductors
Halogens
Photovoltaic cells
Energy harvesting
photovoltaic cells

Experimental characterization of the TOFPET2 ASIC

Bugalho, R., Di Francesco, A., Ferramacho, L., Leong, C., Niknejad, T., Oliveira, L., Rolo, M., Silva, J. C., Silva, R., Silveira, M., Tavernier, S. & Varela, J., 29 Mar 2019, In : Journal of Instrumentation. 14, 3, P03029.

Research output: Contribution to journalArticle

application specific integrated circuits
Application specific integrated circuits
Full width at half maximum
silicon radiation detectors
Radiation Detectors
2 Citations (Scopus)
Radio Frequency Identification Device
Oxides
Zinc Oxide
Radio frequency identification (RFID)
Indium
2 Citations (Scopus)

Sixth-order differential Sallen-and-Key switched capacitor LPF using a-IGZO TFTs

Wadhwa, N., Bahubalindruni, P. G., Chapagai, K., Goes, J., Deb, S. & Barquinha, P., Jan 2019, In : International Journal of Circuit Theory and Applications. 47, 1, p. 33-42

Research output: Contribution to journalArticle

Switched capacitor filters
Capacitor
Capacitors
Filter
Electric power utilization
2 Citations (Scopus)

Using Modified Bessel Functions for Analysis of Nonlinear Effects in a MOS Transistor Operating in Moderate Inversion

Filanovsky, I. M., Oliveira, L. B. & Tchamov, N. T., 1 May 2019, In : IEEE Transactions on Circuits and Systems I: Regular Papers. 66, 5, p. 1897-1907 11 p., 8602361.

Research output: Contribution to journalArticle

Open Access
File
Bessel functions
MOSFET devices
Electric potential
Intermodulation
Drain current
2018
1 Citation (Scopus)
Switched capacitor filters
Networks (circuits)
Operational amplifiers
Water management
Electric potential
DC-DC converters
Networks (circuits)
Electric potential
Sensor nodes
Conversion efficiency
6 Citations (Scopus)

Continuous-Time Delta-Sigma Modulators Based on Passive RC Integrators

de Melo, J. L. A., Paulino, N. & Goes, J., Nov 2018, In : IEEE Transactions on Circuits and Systems I: Regular Papers. 65, 11, p. 3662-3674

Research output: Contribution to journalArticle

Modulators
Smart sensors
Energy efficiency
Genetic algorithms
Bandwidth
2 Citations (Scopus)

Cooperative vehicular communication systems based on visible light communication

Vieira, M. A., Vieira, M., Louro, P. & Vieira, P., 1 Jul 2018, In : Optical Engineering. 57, 7, 076101.

Research output: Contribution to journalArticle

optical communication
telecommunication
Communication systems
vehicles
emitters
5 Citations (Scopus)

Experimental results with TOFPET2 ASIC for time-of-flight applications

Bugalho, R., Di Francesco, A., Ferramacho, L., Leong, C., Niknejad, T., Oliveira, L., Pacher, L., Rolo, M., Rivetti, A., Silveira, M., Silva, J. C., Silva, R., Tavernier, S. & Varela, J., 1 Jan 2018, (Accepted/In press) In : Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 14 p.

Research output: Contribution to journalArticle

application specific integrated circuits
Application specific integrated circuits
Full width at half maximum
silicon radiation detectors
chips
time domain analysis
Time domain analysis
Amorphous silicon
amorphous silicon
Silver
3 Citations (Scopus)

Light-emitting diodes aided indoor localization using visible light communication technology

Vieira, M., Vieira, M. A., Louro, P. & Vieira, P., 1 Aug 2018, In : Optical Engineering. 57, 8, 087105.

Research output: Contribution to journalArticle

Light emitting diodes
optical communication
light emitting diodes
Transmitters
Communication
1 Citation (Scopus)

Optical vehicular communication based on a-SiC:H technology

Vieira, M. A., Vieira, M., Louro, P. & Vieira, P., 1 Jan 2018, (Accepted/In press) In : Science and Technology of Materials.

Research output: Contribution to journalArticle

Communication
Lighting
Headlights
Demultiplexing
Optical gain
8 Citations (Scopus)

Single-Stage Amplifier Biased by Voltage Combiners with Gain and Energy-Efficiency Enhancement

Povoa, R., Lourenço, N., Martins, R., Canelas, A., Horta, N. C. G. & Goes, J., 1 Mar 2018, In : IEEE Transactions on Circuits and Systems II: Express Briefs. 65, 3, p. 266-270 5 p.

Research output: Contribution to journalArticle

Energy efficiency
Topology
Networks (circuits)
Electric potential
Feedback
2017
3 Citations (Scopus)
Switched capacitor filters
Switches
Frequency response
Networks (circuits)
Passive filters

A Robust Fully-Dynamic Residue Amplifier for Two-Stage SAR Assisted Pipeline ADCs

Singh, S., Bahubalindruni, P. & Goes, J., 2017, In : 2017 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS). 8050490.

Research output: Contribution to journalArticle

8 Citations (Scopus)

A Third-Order MASH Σ Δ Modulator Using Passive Integrators

Nowacki, B., Paulino, N. & Goes, J., 1 Nov 2017, In : IEEE Transactions on Circuits and Systems I: Regular Papers. 64, 11, p. 2871-2883 13 p., 7935461.

Research output: Contribution to journalArticle

Operational amplifiers
Modulators
Bandwidth
Processing
10 Citations (Scopus)

Indoor positioning system using a WDM device based on a-SiC: H technology

Vieira, M. A., Louro, P., Mateus, L., Vieira, P. & Vieira, M. M. D. A. C., Nov 2017, In : Journal of Luminescence. 191, p. 135-138 4 p.

Research output: Contribution to journalArticle

Open Access
Wavelength division multiplexing
positioning
Light emitting diodes
Transmitters
Technology
3 Citations (Scopus)
Threshold voltage
Oxides
Semiconductors
Voltage
Transistors
2 Citations (Scopus)
Electronic equipment
electronics
Students
music
recipient
2016
3 Citations (Scopus)

A hybrid approach for the sensitivity analysis of integrated inductors

Pereira, P. M. R., Fino, M. H. S., Sallem, A. & Fakhfakh, M., 1 Jan 2016, In : Integration-The Vlsi Journal. 52, NA, p. 237-242

Research output: Contribution to journalArticle

Sensitivity analysis
Extrapolation
Inductance
Physics
Derivatives

Amorphous Silicon Photovoltaic Modules on Flexible Plastic Substrates

Vygranenko, Y., Fernandes, M., Louro, P., Vieira, M., Khosropour, A., Yang, R., Sazonov, A. & Fernandes, M., 2016, In : MRS Advances. 1, 43, p. 2923-2928 6 p.

Research output: Contribution to journalArticle

Open Access
shunts
Amorphous silicon
amorphous silicon
plastics
modules
3 Citations (Scopus)

A multichannel time–frequency and multi-wavelet toolbox for uterine electromyography processing and visualisation

Batista, A., Najdi, S., Godinho, D. M., Martins, C., Serrano, M. D. F. C., Ortigueira, M. D. & Rato, R. T., 1 Sep 2016, In : Computers in Biology and Medicine. 76, p. 178-191 14 p.

Research output: Contribution to journalArticle

Electromyography
Premature Obstetric Labor
Visualization
Personnel
Processing
8 Citations (Scopus)
Open Access
Capacitors
Clocks
Electric potential
Secondary batteries
Energy harvesting
Binary codes
Error detection
Error correction
Decoding
Irradiation
3 Citations (Scopus)

A quadrature RC-oscillator with capacitive coupling

Casaleiro, J., Oliveira, L. B. & Filanovsky, I. M., Jan 2016, In : Integration, the VLSI Journal. 52, p. 260-271 12 p.

Research output: Contribution to journalArticle

Capacitance
Phase noise
Energy dissipation
Networks (circuits)
Electric potential
2 Citations (Scopus)

Five channel WDM communication using a single a: SiC-H double pin photo device

Silva, V., Barata, M., Louro, P. & Vieira, M. A., 1 Sep 2016, In : Applied Surface Science. 380, p. 318-325 8 p.

Research output: Contribution to journalArticle

Open Access
Wavelength division multiplexing
Wavelength
Communication
Lighting
Recovery
9 Citations (Scopus)

Sensitivity aware NSGA-II based Pareto front generation for the optimal sizing of analog circuits

Kchaou, O. B., Garbaya, A., Kotti, M., Pereira, P., Fakhfakh, M. & Fino, M. H. S., 1 Sep 2016, In : Integration-The Vlsi Journal. 55, p. 220-226 7 p.

Research output: Contribution to journalArticle

Analog circuits
Electric potential
26 Citations (Scopus)

TOFPET2: A high-performance ASIC for time and amplitude measurements of SiPM signals in time-of-flight applications

Di Francesco, A., Bugalho, R., Oliveira, L., Pacher, L., Rivetti, A., Rolo, M., Silva, J. C., Silva, R. & Varela, J., 18 Mar 2016, In : Journal of Instrumentation. 11, 3, C03042.

Research output: Contribution to journalArticle

application specific integrated circuits
Time-of-flight
Application specific integrated circuits
High Performance
time measurement
10 Citations (Scopus)

TOFPET 2: A high-performance circuit for PET time-of-flight

Di Francesco, A., Bugalho, R., Oliveira, L., Rivetti, A., Rolo, M., Silva, J. C. D. & Varela, J., 11 Jul 2016, In : Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 824, p. 194-195 2 p.

Research output: Contribution to journalArticle

Positron emission tomography
Networks (circuits)
Analog to digital conversion
Application specific integrated circuits
Interpolation
Computer hardware description languages
Variable frequency oscillators
Transistors
Simulators
2015
1 Citation (Scopus)

Amplitude and Quadrature Errors of Two-Integrator Oscillator

Casaleiro, J. C. F. D. A., Oliveira, L. A. B. G. D. & Filanovsky, I. M., Sep 2015, In : JOLPE - Journal of Low Power Electronics. 11, 3, p. 340-348 9 p.

Research output: Contribution to journalArticle

Transconductance
Capacitance
Phase noise
Transistors
Tuning
3 Citations (Scopus)

Error control on spectral data of four-wave mixing based on a-SiC technology

Vieira, M. A., Vieira, M. M. D. A. C., Silva, V., Louro, P. & Barata, M., 1 Jan 2015, In : Physica Status Solidi (C) Current Topics In Solid State Physics. 12, 1-2, p. 181-186 6 p.

Research output: Contribution to journalArticle

four-wave mixing
central processing units
optical communication
communication
selectors

Optical processor based on a-SiC technology for spectral data error control

Vieira, M. A., Vieira, M. M. D. A. C., Silva, V. & Louro, P., 1 Oct 2015, In : Microelectronic Engineering. 146, p. 6-10 5 p.

Research output: Contribution to journalArticle

Error detection
Error correction
central processing units
Communication channels (information theory)
Optical design
16 Citations (Scopus)

Optical signal processing for data error detection and correction using a-SiCH technology

Vieira, M. A., Vieira, M. M. D. A. C., Silva, V., Louro, P. & Costa, J., 1 Dec 2015, In : Physica Status Solidi (C) Current Topics In Solid State Physics. 12, 12, p. 1393-1400 8 p.

Research output: Contribution to journalArticle

optical communication
signal processing
central processing units
parity
strings

VIS/NIR wavelength selector based on a multilayer pi'n/pin a-SiC: H optical filter

Vieira, M. A., Vieira, M. A., Silva, V., Louro, P., Rodrigues, I. C. & Fantoni, A., 1 Dec 2015, In : Physica Status Solidi (C) Current Topics In Solid State Physics. 12, 12, p. 1387-1392 6 p.

Research output: Contribution to journalArticle

selectors
optical filters
wavelengths
decoding
spectral sensitivity
2 Citations (Scopus)
Open Access
amorphous silicon
aluminum
nanoparticles
electromagnetic absorption
ellipsoids
Digital to analog conversion
Electric power utilization
Low noise amplifiers
Networks (circuits)
Operational amplifiers
2014
3 Citations (Scopus)
Energy harvesting
Capacitors
Networks (circuits)
Electric potential
Open circuit voltage
5 Citations (Scopus)

A low power balun LNA with active loads for gain and noise figure optimization

Bastos, I., Oliveira, L. B., Goes, J. & Silva, M., 2 Dec 2014, In : Analog Integrated Circuits and Signal Processing. 81, 3(SI), p. 693-702 10 p.

Research output: Contribution to journalArticle

Noise figure
Energy dissipation
Networks (circuits)
Energy harvesting
Sensor nodes
Electric potential
Networks (circuits)
Electric power utilization
6 Citations (Scopus)

On the Dynamic Rounding-off in Analogue and RF Optimal Circuit Sizing

Fino, M. H. S., 1 Jan 2014, In : International Journal Of Electronics. 101, 4, p. 452-468

Research output: Contribution to journalArticle

Open Access
6 Citations (Scopus)
Variable frequency oscillators
Phase noise
Evolutionary algorithms
Transceivers
Analytical models

Regulated Common-Gate TIA with Noise Improvement for Radiation Detectors

Dias, D. C., Melo, F. S., Oliveira, L. A. B. G. D. & Oliveira, J. P. A. D., 2014, In : Int. J. Microelectronics and Computer Science. 5, 2, p. 69-80

Research output: Contribution to journalArticle

Radiation detectors
Operational amplifiers
Topology
Silicon
Networks (circuits)
18 Citations (Scopus)
Operational amplifiers
Silicon
Feedback amplifiers
Diodes
Positron emission tomography
2 Citations (Scopus)

SiC pinpin photonic filters for linking the visible spectrum to the telecom gap

Vieira, M., Vieira, M. A., Louro, P., Fantoni, A. & Silva, V., 25 Aug 2014, In : Microelectronic Engineering. 126, p. 179-183 5 p.

Research output: Contribution to journalArticle

Open Access
selectors
visible spectrum
Photonics
photonics
filters
5 Citations (Scopus)

Tuning optical a-SiC/a-Si active filters by UV bias light in the visible and infrared spectral ranges

Vieira, M., Vieira, M. A., Rodrigues, I., Silva, V. & Louro, P., 2014, In : Physica Status Solidi (C) Current Topics In Solid State Physics. 11, 11-12, p. 1674-1677 4 p.

Research output: Contribution to journalArticle

Open Access
selectors
tuning
filters
wavelengths
spectral bands