PERMITTANCE PRECISION MEASUREMENT DEVICE Russian patent published in 2004 - IPC

Abstract RU 2239200 C2

FIELD: electric measurement technology; permittance measurements.

SUBSTANCE: proposed device has detector and adjustable-gain noninverting amplifier; in addition device is provided with input band filter and additional filter; input of mentioned band filter is designed for connection to first electrode of permittance under measurement and its output, to input of noninverting amplifier; one output of the latter is connected to detector and other one is designed for connection to second electrode of permittance under measurement; detector output is connected to additional filter one of whose outputs is connected to control input of noninverting amplifier and other one functions as information output.

EFFECT: enhanced sensitivity of measurement circuit.

2 cl, 1 dwg

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RU 2 239 200 C2

Authors

Rakhovskij V.I.

Dagaev V.Ju.

Dates

2004-10-27—Published

2001-03-26—Filed