FIELD: electric engineering, in particular, automatic equipment of power supply systems. SUBSTANCE: method involves generation of additional signal by means of phase shift of source signal in arbitrary direction without alternation of its amplitude, generation of first and second additional signals as half sum and half difference of source and additional signals, simultaneous measurement of instantaneous values of additional signals in sampled time moments, and running analog-to-digital conversion of sequence of digital samples of instantaneous values of first and second additional signals. Digital samples of each additional signal are detected for two measurement moments and are used for detection of digital samples of instantaneous values of output signal and generation of sequence of said digital samples. Phase-shifted analog signal is generated by means of digital-to-analog conversion of said sequence of digital samples. EFFECT: frequency-independent phase shift. 4 dwg
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