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A microprocessor-controlled implementation of a fast and simultaneous amplitude and frequency detector for sinusoidal signals is introduced. The method computes the amplitude and frequency from three successive samples of the input signal. A special feature is that the samples are taken within a fraction of the period of the signal being measured, thereby minimizing the measurement time. Automatic selection of the sampling interval is based on the input frequency range.
Instrumentation and Measurement, IEEE Transactions on (Volume:34 , Issue: 3 )
Date of Publication: Sept. 1985