Coded data generation or conversion – Phase or time of phase change – Synchro or resolver signal
Patent
1993-02-25
1996-09-17
Hoff, Marc S.
Coded data generation or conversion
Phase or time of phase change
Synchro or resolver signal
341112, H03M 148
Patent
active
055572731
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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Hoff Marc S.
Honeywell Inc.
Johnson Kenneth J.
Sumner John P.
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