Magnetic azimuth detector to digital (MAD) converter
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United States of America Patent
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Sep 17, 1996
Grant Date -
N/A
app pub date -
Feb 25, 1993
filing date -
Feb 25, 1993
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Abstract
An electrical system for converting a magnetic azimuth detector (MAD) signal into a corresponding digital signal. A conversion circuit receives a three-wire signal from the MAD; the three-wire signal is proportional to an angle .theta., which indicates the position of the MAD relative to magnetic north. The conversion circuit converts the three-wire signal into sin .theta. and cos .theta. signals. A digitization circuit converts the sin .theta. and cos .theta. signals into corresponding digital signals by first half-wave demodulating the analog sin .theta. and cos .theta. signals, then low-pass filtering the signals to extract the DC components, and finally digitizing the analog DC components.
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