Wattmeter comprising a hall sensor and an A/D converter
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United States of America Patent
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Jun 27, 1989
Grant Date -
N/A
app pub date -
Jul 15, 1987
filing date -
Jul 15, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A wattmeter in which a Hall sensor is provided with a large number of Hall elements, whose voltages are individually tapped. The wattmeter circuit is further provided with an impulse-width modulator, the input voltage of this modulator being periodically reversed, with a feedback to compensate the disturbing voltages, and with a circuit for precision curvature compensation CMOS bandgap reference. The output of an embodiment of the wattmeter is adapted to the reading-off by a computer. A wattmeter can be realized on a semiconductor wafer.
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