Forschungszentrum Juelich Gmbh

Forschungszentrum Julich Gmbh

Giovanni Viola

David Divincenzo

A gyrator for AC signals was developed. This gyrator comprises a Hall effect material, means for permeating this Hall effect material with a magnetic field that is perpendicular to the plane or surface of the material, at least one input port for coupling an alternating current (I; I) into the Hall effect material, and at least one output port for outcoupling an output voltage (U; U) which is a measure of the Hall voltage generated by the incoupled alternating current. Each of these ports has at least two terminals, which are connected to the outside. At least one terminal of each port is connected to a connecting electrode, which is electrically insulated from the Hall effect material and forms a capacitor together with the Hall effect material. The alternating current is thus capacitively coupled into the Hall effect material, and the output voltage is capacitively coupled out of the Hall effect material. The capacitive coupling of the connecting electrodes provides boundary conditions for the potential in the interior of the Hall effect material, which do not necessarily force potential jumps there. The development of 'hot spots,' at which energy is dissipated, in the region of potential jumps can thereby advantageously be reduced or even entirely suppressed.

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Aachen, Germany

Giovanni Viola