Patent ID: 7875914
Filing Date: 2011-01-25
Classification: H01L,H03F

Abstract:
1. A switch mode power amplifier, comprising: a signal input terminal; a power terminal; a ground terminal, a resonant circuit coupling the drain terminal to an output terminal, the resonant circuit configured to provide a bandpass filter that passes a desired output frequency f a resistance coupling the output terminal to the ground terminal, and a field effect transistor including a channel layer, a barrier layer on the channel layer wherein the barrier layer and the channel layer are configured to generate a two-dimensional electron gas (2DEG) at an interface therebetween, at least two dielectric layers over the barrier layer, source and drain electrodes contacting the barrier layer and coupled to the ground terminal and the power terminal respectively, and a gate electrode coupled to the signal input terminal and positioned on the at least two dielectric layers between the source and drain electrodes wherein at least one of the at least two dielectric layers is between the gate electrode and the barrier layer and wherein the gate electrode is isolated from the barrier layer by the at least one of the at least two dielectric layers.