DEVICE FOR EXAMINING LIVING TISSUES OF BIOLOGICAL OBJECT USING IMPEDOMETRY METHOD Russian patent published in 1998 - IPC

FIELD: medical engineering. SUBSTANCE: device has generator, transformer, transducer having measuring inductance coil and capacitor having one lead connected to one of leads of the measuring inductance coil and to potential input lead of recorder, the other lead is connected to low potential input lead of the recorder. The generator is of impulse type. Additional pulse shaper and power amplifier are connected in series and linked to generator output. Power amplifier output is connected to input winding of the transformer. Capacitor is set between potential lead of the input winding of the transformer and potential input lead of the recorder. The second lead of the measuring inductance coil is connected to low potential lead of the output winding of the transformer and low potential input lead of the recorder. The recorder has buffer amplifier and two parallel channels connected in series. The first one has broad band-width amplifier having $$$ gain factor connected in series to the first comparator which outlet is connected to the first inlet of switchboard. The second channel has the second comparator which outlet is connected to the second inlet of switchboard comparator which outlet is connected to the first inlet of counter the second inlet of which is connected to output generator and its outlet is connected to indication circuit having decoder and indication unit connected in series. Three versions of arrangement and making measuring inductance coil windings are suggested. EFFECT: wide range of functional applications. 4 cl, 2 dwg