Direct current voltage transformer

Details Direct current voltage transformer Direct current voltage transformer

1997-04-23

1999-08-17

Crane, Sara

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

Magnetic field

257425, 257194, H01L 2982

Patent

active

059397640

ABSTRACT:
The DC transformer includes structure having a high mobility, two-dimensional electron gas contained within a plane therein. A magnetic field is maintained normal to the electron gas plane and the transformer structure is kept at a cryogenic temperature. Gate electrodes on the structure are biased negatively with respect to the electron gas and shaped to create a quantum point contact connecting two quantized Hall regions in the electron gas. The two regions have different quantized Hall conductivites. In one embodiment, this difference is due to different donor concentrations. Because the current is the same in the two regions, an input voltage applied across the one region will be stepped up or stepped down as measured between the output contacts to the other region.

REFERENCES:
patent: 4488164 (1984-12-01), Kazarinov et al.
patent: 5041393 (1991-08-01), Ahrens et al.
patent: 5099295 (1992-03-01), Ogawa
patent: 5270557 (1993-12-01), Schmidt
patent: 5280181 (1994-01-01), Saito et al.
patent: 5332911 (1994-07-01), von Klitzing et al.
patent: 5485018 (1996-01-01), Ogawa et al.

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