Multiplexed-demultiplexed synchro demodulation apparatus
AssigneeSperry Corporation
InventorsHarold L. Swartz, Harry D. Smith, Terrence L. Grimes
Life of this patent
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Abstract
The outputs of a three-wire synchro are applied to a multiplexer which provides the multiplexed synchro outputs to an amplifier and demodulator. The demodulated synchro outputs are applied to a demultiplexer whose outputs are filtered to provide demodulated d.c. voltages corresponding to the synchro output signals. The demodulated d.c. voltages are applied to a conversion circuit for providing the sine and cosine of the angular position of the three-wire synchro device. The multiplexer, demultiplexer and demodulator are synchronized by the synchro a.c. reference signal.
Claims11
Apparatus for use with synchro device means, said synchro device means providing a plurality of modulated synchro output signals, said apparatus demodulating said plurality of modulated synchro output signals into a respective plurality of d.c. signals, comprising
- multiplexer means having a multiplexer output and responsive to said plurality of modulated synchro output signals for time multiplexing said plurality of modulated synchro output signals on to said multiplexer output, for providing time multiplexed modulated synchro output signals on said multiplexer output,
- demodulator means responsive to said time multiplexed modulated synchro output signals for demodulating said time multiplexed modulated synchro output signals, thereby providing demodulated time multiplexed synchro output signals,
- demultiplexer means having a plurality of demultiplexer outputs and responsive to said demodulated time multiplexed synchro output signals for time demultiplexing said time multiplexed synchro output signals onto said plurality of demultiplexer outputs, and
- means for synchronizing said multiplexer means and said demultiplexer means with respect to each other to provide said plurality of d.c. signals on said plurality of demultiplexer outputs, respectively.
Dependencies are inferred from the claim text.