FIELD: radio engineering. SUBSTANCE: device has the first and the second frequency mixer phase shift circuit, heterodyne, the first and the second intermediate frequency filter. analog-to-digital converter, the first and the second voltage comparator units, XOR-gate, divider counter per 2n, N-position cumulating adder, digital comparator unit and m-position register. EFFECT: high accuracy and performance with exact algorithm implemented on hardware base without nonlinear operations used. 2 dwg
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