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This paper describes the design, simulation and measurement of a GaN power amplifier suitable for envelope and phase signal combination. The low-frequency envelope signal is used to vary the gate (bias) voltage of the device, resulting in a pulse width modulated drain voltage, while modulation of supply voltage or current is avoided. The test circuit is implemented using a discrete GaN HEMT power
Malmö stad antog 1997 en ny personalpolicy, P2006, vilken är indelad i sju profilområden. Ett av dessa profilområden har som målsättning att utveckla flexibla arbetstidsmodeller som ska tillgodose verksamhetens, kundens och den anställdes önskemål, samt skapa förutsättningar för alternativa karriärvägar för personalen. I samband med en utvärdering av de flexibla arbetstidsmodellerna uppdrogs åt S
With a worldwide increase in disasters, the effects of climate change are already being felt, and it is the urban poor in developing countries that are most at risk. There is an urgent need to better understand the factors that determine people’s capacity to cope with and adapt to adverse climate conditions. This paper examines the influence of formal education in determining the adaptive capacity
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We observe and analyze a considerable enhancement of photoelectron intensity of the valence band features in solid B2O3 upon tuning the photon energy across the B 1s → π*2pz resonance. This enhancement is an evidence of the strong 2p electron correlations in pre-edge photoionization dynamics in boron oxide. Such strength of the correlation is unusual for a solid, whose valence band is composed of
