Results 11 to 20 of about 1,517 (217)
Micromachines, 2019 Point-of-care ultrasound systems are widely used in ambulances and emergency rooms. However, the excessive heat generated from ultrasound transmitters has an impact on the implementation of piezoelectric transducer elements and on battery consumption ...
Hojong Choi
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A design methodology for audio amplifiers with no global negative feedback: proposal and validation
Semina: Ciências Exatas e Tecnológicas, 2022 This paper proposes a structured methodology for the design of high-performance audio amplifiers without the use of global negative feedback. This type of amplifier is being suggested in order to minimize supposed deleterious effects on audio quality ...
Rafael Marchiori Visintin +3 more
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Class-E Amplifier Design Improvements for GSM Frequencies
The Journal of Engineering Research, 2011 Efficient power amplifiers are essential in portable battery-operated systems such as mobile phones. Also, the power amplifier (PA) is the most power-consuming building block in the transmitter of a portable system.
Z. Nadir, F. Touati
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A New Topology of Load Network for Class F RF Power Amplifiers [PDF]
Engineering and Technology Journal, 2016 High efficiency RF power amplifiers are increasingly needed in modern mobile communication systems to reduce the battery size and power supply consumption.
Firas Mohammed Ali Al-Raie
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Filterless, Digital Class-BD Audio Amplifiers with Constant Common Mode Output Voltage
Energies, 2021 This paper presents new and original architectures and implementations of two filterless, open-loop digital Class-BD audio amplifiers with constant common mode (CM) output voltage.
Stanisław Kuta +3 more
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Energies, 2018 In this article, a highly efficient power module is presented with two class-E power amplifiers and an adaptive power combiner for transmitting output powers >100 W at 6.78 MHz in a wireless power transfer system.
Ui-Gyu Choi, Jong-Ryul Yang
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Photonic crystal fiber amplifiers for high power ultrafast fiber lasers
Nanophotonics, 2013 In recent years, ultrafast laser systems using large-mode-area fiber amplifiers delivering several hundreds of watts of average power has attracted significant academic and industrial interest.
Alkeskjold Thomas T. +8 more
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A Comprehensive Harmonic Analysis of Current-Mode Power Amplifiers
Energies, 2021 This work presents a comprehensive theoretical analysis of current-mode power amplifiers as a function of input power for different biasing classes under the common simplifying assumption of constant transconductance and hard current cut-off/saturation ...
Chiara Ramella +2 more
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Ultra-High-Bandwidth Power Amplifiers: A Technology Overview and Future Prospects
IEEE Access, 2022 Testing of power electronic converters can advantageously be carried out in power-hardware-in-the-loop (P-HIL) environments that emulate the behavior of power grids, electric motors, etc. The interface between the model and the device under test requires
Julian Bohler +6 more
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GaN-based Power amplifiers for microwave applications
Ingeniería Investigación y Desarrollo, 2016 This paper presents a discussion about the design strategies of different kind of power amplifiers for RF/Microwave appli- cations, such as the tuned load power amplifier, class F, class F-1 and Doherty.
Jorge Julián Moreno-Rubio +5 more
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