FIELD: measurement technology. SUBSTANCE: measurement is performed at one point of time axis. Device has pulse former 1, second division unit 2, differentiation unit 3, first and second selection and storage units 4, 5, respectively, first division unit 6, first and second comparators 7 and 8, trigonometric converter 9, reference-voltage source 10, amplifier 11 which controlled transmission factor, and adder 12 with respective connections. EFFECT: higher measurement speed for phase shifts of harmonic signals within the range of -П +П, simplified construction. 1 dwg
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