Coded data generation or conversion – Phase or time of phase change – Synchro or resolver signal
Reexamination Certificate
2007-03-27
2007-03-27
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Phase or time of phase change
Synchro or resolver signal
C341S143000
Reexamination Certificate
active
11347703
ABSTRACT:
A resolver arrangement that is inexpensive and yet offers high resolution and high noise rejection includes a carrier signal generator and two processing channels each of which has an analog input connected a different one of the stator coils and a channel output. Each of the processing channels includes a sigma-delta modulator with an output that supplies a bit-stream representative of an analog input signal received from a respective stator coil. Each channel also includes a first digital filter that receives the bit-stream from the sigma-delta modulator and converts the bit-stream to intermediate digital data-words. In addition, each channel has a digital synchronous demodulator that demodulates the intermediate digital data-words in synchronism with the carrier signal providing demodulated data-words. Finally, each channel has a second digital filter that averages the demodulated data-words and supplies digital output data-words on the channel output, the carrier signal being suppressed in the output data-words.
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Badenius Mikael
Ohnhaeuser Frank
Reinhold Michael
Brady III W. James
Jean-Pierre Peguy
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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