Improved graphene-base heterojunction transistor with different collector semiconductors for high-frequency applications

New research paper from TU Dresden & others. Abstract "A new kind of transistor device with a graphene monolayer embedded between two n-typesilicon layers is fabricated and characterized. The device is called graphene-base heterojunction transistor (GBHT). The base-voltage controls the current of the device flowing from the emitter via graphene to the collector. The transit time for e... » read more

A Novel Design Method of Highly Efficient Saturated Power Amplifier Based On Self-Generated Harmonic Currents

A novel design method without requiring the special harmonic termination circuit for a highly efficient power amplifier (PA) is proposed. The proposed PA is driven into saturated operation, from the linear to knee region, by adjusting the only fundamental load, and the saturated operation induces self-generated harmonic currents. The current and voltage waveforms can be shaped easily by the har... » read more