Results 21 to 30 of about 6,815,632 (371)
Harmonic-Reduced Bias Circuit for Ultrasound Transducers
Sensors, 2023 The gain of class-C power amplifiers is generally lower than that of class-A power amplifiers. Thus, higher-amplitude input voltage signals for class-C power amplifiers are required.
Hojong Choi
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IEEE Access, 2021 Electrical power converters use semiconductor switching devices for a larger loss reduction compared with non-switching power linear amplifiers, such as class-B amplifiers.
Hidemine Obara +2 more
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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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Suitability of acoustic power amplifiers as power amplifiers in underwater communication systems [PDF]
International Journal of Electronics and TelecommunicationsThe paper presents selected acoustic power amplifiers from among those currently available. The results of a series of measurements characteris ing the amplifiers are presented.
Aleksander M. Schmidt +2 more
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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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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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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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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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