PROCEDURE MEASURING FREQUENCY OF SINUSOIDAL SIGNALS AND DEVICE FOR ITS REALIZATION Russian patent published in 2002 - IPC

FIELD: communication, information and measurement equipment. SUBSTANCE: procedure measuring frequency of sinusoidal signals includes generation of present phase of signal as argument of complex number, generation of difference ψ_k of adjacent present phases of signal, formation of double component vector a(k) of condition which components are set by recurrent expressions. Frequency of each measurement step is determined in correspondence with formula. Device for realization of procedure has two networks comprising multiplier, low-pass filter and analog-to-digital converter connected in series, permanent storage, phase inverter, two subtracters, three storage elements, counter, clock generator and two arithmetic units. EFFECT: possibility of obtainment of present evaluation of frequency of signal in real time. 3 cl, 2 dwg