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Efficient power conversion at high switching frequencies requires switching transistors with a low gate charge to limit the switching losses in addition to low specific ON resistance. We report two integrable GaAs switching pHEMTs, 14 V enhancement mode and 7 V depletion mode transistors that show much superior switching figure of merit (Ron times QG) than that of state-of-the-art silicon MOSFETs...
This paper presents a high power efficiency DC-DC buck converter in Gallium Arsenide technology targeting integrated power amplifier modules. The buck converter adopts an interleaved structure with negatively coupled inductors. Analysis of the effect of coupling on the steady state and transient response of the converter is given. The coupling factor is selected to achieve a maximum power efficiency...
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