Results 11 to 20 of about 154,655 (285)
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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Mobile Phone Power Amplifier Linearity and Efficiency Enhancement Using Digital Predistortion [PDF]
, 2003 The new generation mobile communication systems using spectrum efficient linear modulation schemes (QPSK,8PSK,QAM)need linear power amplifiers in the transmission path to have good ACPR and EVM values.
Ceylan, N. +3 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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Industrial GaInP/GaAs Power HBT MMIC Process [PDF]
, 2000 UMS has developed an industrial power HBT process especially dedicated to power MMICs in the 10GHz frequency range. The process has been qualified and meets the very demanding specifications required for X-Band high power amplifiers.
Auxemery, P. +4 more
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Theory Based on Device Current Clipping to Explain and Predict Performance Including Distortion of Power Amplifiers for Wireless Communication Systems [PDF]
, 2008 Power amplifiers are critical components in wireless communication systems that need to have high efficiency, in order to conserve battery life and minimise heat generation, and at the same time low distortion, in order to prevent increase of bit ...
Tian, Yunjia, Tian, Yunjia
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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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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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