Results 21 to 30 of about 339,663 (292)
Energies, 2022 A novel Class-C pulsed power amplifier with a voltage divider integrated with a high-voltage transistor and switching diodes is proposed to reduce DC power consumption and increase the maximum output power for handheld ultrasound instruments.
Hojong Choi
doaj +1 more source
Efficiency of low power audio amplifiers and loudspeakers [PDF]
, 2001 In this paper we look at the load presented to audio amplifiers by real transducers. We consider the power losses in Class-AB and Class-D amplifier topologies, and determine that in order to predict efficiency it is necessary to consider the amplifier ...
Burrow, SG, Grant, Duncan A
core +2 more sources
Compact 50 W All-Solid-State Picosecond Laser System at 1 kHz
Applied Sciences, 2020 Compact, stable, high-power and high repetition rate picosecond laser systems are excellent sources for optical parametric chirped pulse amplification systems and laser satellite ranging systems. Compared with the traditional complex high-power amplifier,
Shuaishuai Yang +4 more
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Design of High-Power High-Efficiency Broadband GaN HEMT Power Amplifier for S Band Applications using Load-Pull Technique [PDF]
ITM Web of Conferences, 2022 This work reveals the design for broadband high-power high-efficiency GaN HEMT power amplifier, operating in the frequency band ranging from 2.15 GHz to 2.65 GHz. The proposed structure is implemented using Cree GaN HEMT CGH40010 transistor.
Ribate Mohamed +4 more
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A 2.7-kW, 29-MHz class-E/F/sub odd/ amplifier with a distributed active transformer [PDF]
, 2005 A Class-E/Fodd high power amplifier (PA) using the distributed active transformer (DAT) is demonstrated at 29MHz. The DAT combines the output power from four VDMOS push-pull pairs.
Jeon, Sanggeun, Rutledge, David B.
core +1 more source
Broadband power amplifier limitations due to package parasitics [PDF]
Serbian Journal of Electrical Engineering, 2015 Limitations of CMOS broadband power amplifiers due to package parasitics have been explored in this paper. The constraints of power amplifier matching network, realized as a third-order Chebyshev filter, have been derived, and a new power ...
Grujić Dušan N., Saranovac Lazar
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Fully integrated CMOS power amplifier design using the distributed active-transformer architecture [PDF]
, 2002 A novel on-chip impedance matching and power-combining method, the distributed active transformer is presented. It combines several low-voltage push-pull amplifiers efficiently with their outputs in series to produce a larger output power while ...
Aoki, Ichiro +3 more
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Femtosecond pulses at 50-W average power from an Yb:YAG planar waveguide amplifier seeded by an Yb:KYW oscillator [PDF]
, 2012 We report the demonstration of a high-power single-side-pumped Yb:YAG planar waveguide amplifier seeded by an Yb:KYW femtosecond laser. Five passes through the amplifier yielded 700-fs pulses with average powers of 50 W at 1030 nm. A numerical simulation
Baker, Howard John +5 more
core +1 more source
Sensors, 2021 To obtain a high-quality signal from an ultrasound system through the transmitter, it is necessary to achieve an appropriate operating point of the power amplifier in the ultrasonic transmitter by applying high static bias voltage.
Kyeongjin Kim, Hojong Choi
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Design of CMOS-Based Unit Channel of Beamforming Transceivers for FACS Applications
IEEE Access, 2023 In this study, we designed the unit channel of beamforming transceivers for flexible access common spectrum (FACS) applications. The designed unit channel consisted of power amplifier, low noise amplifier, gain amplifier, attenuator, phase shifter, and ...
Seongjin Jang +5 more
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