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Method and apparatus for reducing microprocessor speed requirements in data acquisition applications
Method and apparatus for reducing microprocessor speed requirements in data acquisition applications
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机译:在数据采集应用中降低微处理器速度要求的方法和装置
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摘要
A method and apparatus for improving microprocessor data acquisition. Noise in analog signals is removed by a low pass filter with a variable cutoff frequency controlled to cut off all frequencies above a frequency range of interest. The filtered signal is sampled by an analog-to-digital converter at a sampling rate which is variable and controlled to sample at a rate that is at least two times the low pass filter cutoff frequency thereby reducing the rate at which data is passed to a microprocessor and reducing the need for speed in the microprocessor's processing.
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