FIELD: instrumentation engineering and measurement technology. SUBSTANCE: device used for resistance and reactance measurements has two circuits set up of two series- connected resistors R1, R2 and R3, R4; power supplies; and amplifier. Equilibrium conditions of measuring bridge are described by expression R1/R2 + 1 = KR3/R4, where R1, R2, R3, R4 are resistors; K is gain factor. EFFECT: provision for eliminating common-mode signal at bridge output. 2 cl, 2 dwg
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