Resolver digital converter
A resolver, digital converter technology, applied in the direction of converting sensor output, instruments, measuring devices, etc., can solve the problems of low detection accuracy, inability to offset error amplitude error, etc., to achieve the effect of improving reproducibility and fast processing
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[0034] Hereinafter, an embodiment of the resolver-to-digital converter of the present invention will be described with reference to the drawings.
[0035] The resolver-to-digital converter 10 of this embodiment converts, for example, a detection signal output from a resolver 1 of a 1-phase excitation-2-phase output type or the like into a digital angle signal. The resolver-to-digital converter 10 for example figure 1 As shown, it is configured to include: an excitation signal input circuit 11, a resolver sine value signal (SIN) input circuit 12, a resolver cosine value signal (COS) input circuit 13, an analog-to-digital (A / D) conversion circuit (analog-digital Converter) 14, band-pass filter for excitation signal (band-pass processing unit) 15, sign determination circuit 16, first and second band-pass filter for detection signal (band-pass processing unit, correction unit) 17, 18. First and second maximum and minimum detection circuits 19, 20, first and second multiplication ...
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