Results 51 to 60 of about 11,774 (280)

Optimization of A-class power amplifiers in terms of efficiency

Физика волновых процессов и радиотехнические системы
Background. Typical A-class power amplifiers usually have low electronic efficiency values, since their operating conditions do not always correspond to the optimal efficiency mode. The Aim of the article is to optimize the efficiency of an A–class power
Aleksander V. Baranov
doaj   +1 more source

Novel Reconnection-Less Reconfigurable Filter Design Based on Unknown Nodal Voltages Method and Its Fractional-Order Counterpart

Elektronika ir Elektrotechnika, 2019
A novel solution of reconnection-less electronically reconfigurable filter is introduced in the paper. The filter is designed based on unknown nodal voltages method (MUNV) using operational transconductance amplifiers (OTAs) and variable gain amplifier ...
Lukas Langhammer, Roman Sotner, Jan Dvorak, Jan Jerabek, Peter A. Ushakov   +4 more
doaj   +1 more source

Electronic Poiseuille flow in hexagonal boron nitride encapsulated graphene field effect transistors

Physical Review Research, 2023
Electron-electron interactions in graphene are sufficiently strong to induce a correlated and momentum-conserving flow such that charge carriers behave similarly to the Hagen-Poiseuille flow of a classical fluid.
Wenhao Huang, Tathagata Paul, Kenji Watanabe, Takashi Taniguchi, Mickael L. Perrin, Michel Calame   +5 more
doaj   +1 more source

Fibre Brillouin amplifier with electronically controlled bandwidth

Electronics Letters, 1986
A novel technique for controlling the bandwidth of a fibre Brillouin amplifier is proposed and demonstrated. By using a frequency-modulated pump laser, in this case an external-cavity semiconductor laser, we have increased the bandwidth of useful gain by more than one order of magnitude.
N. A. Olsson, J. P. van der Ziel
openaire   +1 more source

Encyclopedia of 2D β′‐In2Se3 Growth Using Chemical Vapor Deposition: The Effects of Synthesis Parameters Onto Material Quality

Advanced Engineering Materials, EarlyView.
A distinct semi‐confined inner‐tube chemical vapor deposition geometry enables reproducible, large‐area growth of phase‐pure 2D β′‐In2Se3 from InI + Se precursors. Engineering local vapor transport and optimizing precursor delivery and temperature–time conditions yield uniform continuous films.
Dasun P. W. Guruge, P. Sanju S. Panawala, Joseph F. S. Fernando, Zhenhuan Chen, Chao Zhang, Dong‐Chen Qi, Liangzhi Kou, Konstantin L. Firestein, Dmitri V. Golberg   +8 more
wiley   +1 more source

Failure Mechanisms of Satellite Radio Frequency Modules in Extreme Environments: Challenges and Future Trends

Aerospace
Satellite communication greatly extends the reach and functionality of terrestrial communication networks, providing indispensable applications in defense, security, transportation, science, and technology.
Shuo Yan, Haoyi Wang, Jianzhong Ding
doaj   +1 more source

Modular and scalable control and data acquisition system for power hardware in the loop (PHIL) amplifiers

The Journal of Engineering, 2019
This study presents a newly developed modular system for control of power electronic amplifiers in high-power, high-frequency power hardware in the loop experiments.
Mark A. H. Broadmeadow, Geoffrey R. Walker, Geoffrey R. Walker, Gerard F. Ledwich   +3 more
doaj   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Theory of parametrically amplified electron-phonon superconductivity

Physical Review B, 2017
The ultrafast optical manipulation of ordered phases in strongly correlated materials is a topic of significant theoretical, experimental, and technological interest. Inspired by a recent experiment on light-induced superconductivity in fullerenes [Mitrano et al., Nature 530, 2016], we develop a comprehensive theory of light-induced superconductivity ...
Babadi, Mehrtash, Knap, Michael, Martin, Ivar, Refael, Gil, Demler, Eugene   +4 more
openaire   +4 more sources

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source