| 摘要 |
FIELD: measurement technology; high-accuracy measurement of phase shift in harmonic signals at infralow frequencies. SUBSTANCE: device has first and second input buses of device, first and second retrieval-storage units, control pulse shaper, phase relation determining unit, unit for square root extraction from sum of squares of two quantities, adder, first analog switch, division unit, trigonometric converter, second analog switch, comparison unit, converting unit, and output bus of device with relevant connections. EFFECT: improved measurement accuracy at phase shifts approaching zero or multiple of π/2,, low measurement error at infralow frequencies of signals incorporating DC components with amplitudes of signals being measured liable to vary within wide dynamic range. 5 dwg |
