Coded data generation or conversion – Phase or time of phase change – Synchro or resolver signal
Patent
1989-08-07
1991-07-23
Scott, J. R.
Coded data generation or conversion
Phase or time of phase change
Synchro or resolver signal
341112, H03M 164
Patent
active
050347438
ABSTRACT:
An ac encoded signal to digital converter suitable for converting ac synchro or resolver signals to a corresponding digital angle value. A synchronous demodulator including a high pass input filter and low pass output filter utilizes the associated reference excitation signal to convert the individual ac encoded signals to corresponding dc values. The absolute value of the dc values are proportional to the amplitude of each of the respective ac encoded signals, but the dc value is negative if the ac encoded signal is 180.degree. out of phase with the reference excitation signal. These dc values are subsequently digitized and digitally processed based on their trigonometric relationship to extract the encoded angular position value.
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Biel Joseph R.
Deppe James G.
Flight Visions Incorporated
Scott J. R.
Young B. K.
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