Title :
A Simple Fast Frequency Detector for a Constant Amplitude Sinusoid
Author :
Mahmood, Mahir K. ; Allos, Janan E. ; Abdul-Karim, Majid A.H.
Abstract :
The frequency of a constant-amplitude sinusoidal signal is measured within a small fraction of a cycle. This is accomplished by carrying out computations on two successive samples of the input signal. System delay expressed in a fraction of a cycle is given by two times the ratio of the input-to-sampling frequencies. An inverse sine function is computed using digital hardware, giving a digital output representing the frequency.
Keywords :
Counting circuits; Delay systems; Detectors; Frequency measurement; Hardware; Power system transients; Sampling methods; Time measurement; Timing; Velocity measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1984.4315233
