Direct current voltage transformer
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United States of America Patent
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-
Aug 17, 1999
Grant Date -
N/A
app pub date -
Apr 23, 1997
filing date -
Apr 23, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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