FIELD: electric measurements. SUBSTANCE: instrument D C converter includes magnetic circuit enveloping current lead with measured current. Magnetic circuit has narrow gap where Hall generator is positioned. Magnetic circuit carries winding of negative feedback. Current terminals of Hall generator are connected to source of current of rectangular form. Power amplifier of converter incorporates alternating voltage amplifier, rectifier and direct current amplifier connected in series. Constant voltage gain factor of above-mentioned alternating voltage amplifier is equal to zero. Constant voltage gain factor of above-mentioned current amplifier is equal to one. Bias voltage of mentioned amplifier does not affect operation of converter. EFFECT: decreased additive error. 1 dwg
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