In/sub 0.5/(Al/sub x/Ga/sub 1-x/)/sub 0.5/ HEMTs for high-efficiency low-voltage power amplifiers: design, fabrication, and device results

1999 ◽  
Vol 47 (8) ◽  
pp. 1404-1412 ◽  
Author(s):  
Yu-Chi Wang ◽  
Jenn-Ming Kuo ◽  
Fan Ren ◽  
J.R. Lothian ◽  
Huan-Shang Tsai ◽  
...  
Keyword(s):  
Power Amplifiers ◽  
High Efficiency ◽  
Low Voltage

Low voltage, high efficiency GaAs Class E power amplifiers for wireless transmitters

1995 ◽  
Vol 30 (10) ◽  
pp. 1074-1080 ◽  
Author(s):  
T. Sowlati ◽  
C.A.T. Salama ◽  
J. Sitch ◽  
G. Rabjohn ◽  
D. Smith
Keyword(s):  
Power Amplifiers ◽  
High Efficiency ◽  
Low Voltage ◽  
Wireless Transmitters ◽  
Class E

scholarly journals Novel High-Efficiency High Step-Up DC–DC Converter with Soft Switching and Low Component Voltage Stress for Photovoltaic System

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1112
Author(s):  
Yu-En Wu ◽  
Jyun-Wei Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Leakage Inductance ◽  
Power Switch ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Voltage Stress ◽  
Voltage Doubler

This study developed a novel, high-efficiency, high step-up DC–DC converter for photovoltaic (PV) systems. The converter can step-up the low output voltage of PV modules to the voltage level of the inverter and is used to feed into the grid. The converter can achieve a high step-up voltage through its architecture consisting of a three-winding coupled inductor common iron core on the low-voltage side and a half-wave voltage doubler circuit on the high-voltage side. The leakage inductance energy generated by the coupling inductor during the conversion process can be recovered by the capacitor on the low-voltage side to reduce the voltage surge on the power switch, which gives the power switch of the circuit a soft-switching effect. In addition, the half-wave voltage doubler circuit on the high-voltage side can recover the leakage inductance energy of the tertiary side and increase the output voltage. The advantages of the circuit are low loss, high efficiency, high conversion ratio, and low component voltage stress. Finally, a 500-W high step-up converter was experimentally tested to verify the feasibility and practicability of the proposed architecture. The results revealed that the highest efficiency of the circuit is 98%.

Enhancement Mode PHEMT for Single Supply High Efficiency Power Amplifiers

1999 ◽  
Author(s):  
Y. Tkachenko ◽  
A. Klimashov ◽  
C. Wei ◽  
Y. Zhao ◽  
D. Bartle
Keyword(s):  
Power Amplifiers ◽  
High Efficiency ◽  
Enhancement Mode
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