Digital signal processing method and system, electric power system signal processing system and electric power control system
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United States of America Patent
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Oct 19, 1993
Grant Date -
N/A
app pub date -
Jan 11, 1991
filing date -
Jan 16, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Analog signals are sampled and converted into digital data which is then filtered by a digital filter. The filtered digital data is then subjected to an arithmetic operation. The blocking band of the digital filter is set to a frequency band which is above the pass band of the analog signal components. Frequency of sampling, as well as the frequency of noise caused by the sampling, is elevated, so that the noise frequency falls within the blocking band of the digital filter.
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